Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/package.mo): time 0.8559/0.8559, allocations: 153.8 MB / 172.7 MB, free: 4.859 MB / 142.1 MB " [Timeout remaining time 179] Using package ThermoSysPro with version 4.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/package.mo) Running command: translateModel(ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve") translateModel(ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2500,variableFilter="",fileNamePrefix="ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve") [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 0.0005539/0.0005539, allocations: 15.98 kB / 250.3 MB, free: 3.914 MB / 206.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1533/0.1539, allocations: 33.35 MB / 283.6 MB, free: 2.059 MB / 222.1 MB Notification: Automatically loaded package Complex 4.1.0 due to uses annotation from Modelica. Notification: Automatically loaded package ModelicaServices 4.1.0 due to uses annotation from Modelica. Notification: Automatically loaded package Modelica 4.1.0 due to usage. Notification: Performance of NFInst.instantiate(ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve): time 1.859/2.013, allocations: 307.8 MB / 0.5775 GB, free: 17.35 MB / 478.1 MB Notification: Performance of NFInst.instExpressions: time 0.2074/2.221, allocations: 165.1 MB / 0.7388 GB, free: 15.77 MB / 0.6075 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0003932/2.221, allocations: 11.94 kB / 0.7388 GB, free: 15.75 MB / 0.6075 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Fluid/BoundaryConditions/SourceP.mo:59:3-60:65:writable] Warning: Connector C is not balanced: The number of potential variables (9) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Fluid/BoundaryConditions/SinkP.mo:47:3-48:67:writable] Warning: Connector C is not balanced: The number of potential variables (9) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Fluid/PressureLosses/DynamicCheckValve.mo:56:3-57:67:writable] Warning: Connector C1 is not balanced: The number of potential variables (9) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Fluid/PressureLosses/DynamicCheckValve.mo:58:3-59:65:writable] Warning: Connector C2 is not balanced: The number of potential variables (9) is not equal to the number of flow variables (0). Notification: Performance of NFTyping.typeComponents: time 0.0002914/2.221, allocations: 59.44 kB / 0.7388 GB, free: 15.7 MB / 0.6075 GB Notification: Performance of NFTyping.typeBindings: time 0.0005968/2.222, allocations: 154.8 kB / 0.739 GB, free: 15.54 MB / 0.6075 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteam/IF97_packages.mo:783:9-783:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteam/IF97_packages.mo:850:9-850:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteam/IF97_packages.mo:1088:9-1088:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteamSimple/prop4_Ph.mo:69:3-69:60:writable] Warning: dh1satp was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteamSimple/prop4_Ph.mo:69:3-69:60:writable] Warning: dh2satp was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteamSimple/prop4_Ph_der.mo:167:3-170:49:writable] Warning: du1satp_der was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/WaterSteamSimple/prop4_Ph_der.mo:167:3-170:49:writable] Warning: du2satp_der was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro master/Properties/Fluid/derDensity_derP_derh.mo:63:5-63:84:writable] Warning: T was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. Notification: Performance of NFTyping.typeClassSections: time 0.03333/2.255, allocations: 11.64 MB / 0.7504 GB, free: 3.898 MB / 0.6075 GB Notification: Performance of NFFlatten.flatten: time 0.0008255/2.256, allocations: 0.491 MB / 0.7508 GB, free: 3.406 MB / 0.6075 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0003592/2.256, allocations: 214.7 kB / 0.7511 GB, free: 3.195 MB / 0.6075 GB Notification: Performance of NFEvalConstants.evaluate: time 0.000401/2.257, allocations: 219.2 kB / 0.7513 GB, free: 2.98 MB / 0.6075 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0003389/2.257, allocations: 202.9 kB / 0.7515 GB, free: 2.781 MB / 0.6075 GB Notification: Performance of NFPackage.collectConstants: time 8.027e-05/2.257, allocations: 40 kB / 0.7515 GB, free: 2.742 MB / 0.6075 GB Notification: Performance of NFFlatten.collectFunctions: time 0.03691/2.294, allocations: 18.62 MB / 0.7697 GB, free: 104 kB / 0.6231 GB Notification: Performance of NFScalarize.scalarize: time 0.0002221/2.294, allocations: 111.7 kB / 0.7698 GB, free: 15.99 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.0002738/2.295, allocations: 198.9 kB / 0.77 GB, free: 15.8 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.02213/2.317, allocations: 9.887 MB / 0.7796 GB, free: 5.883 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 6.853e-06/2.317, allocations: 0 / 0.7796 GB, free: 5.883 MB / 0.6387 GB Notification: Performance of FrontEnd: time 1.974e-06/2.317, allocations: 0 / 0.7796 GB, free: 5.883 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 1.59e-05/2.317, allocations: 0 / 0.7796 GB, free: 5.883 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 95 * Number of variables: 95 Notification: Performance of Generate backend data structure: time 0.005347/2.322, allocations: 1.924 MB / 0.7815 GB, free: 3.91 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 4.47e-05/2.322, allocations: 8.031 kB / 0.7815 GB, free: 3.902 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002621/2.323, allocations: 75.61 kB / 0.7816 GB, free: 3.828 MB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0005691/2.323, allocations: 288.8 kB / 0.7819 GB, free: 3.523 MB / 0.6387 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.649e-05/2.323, allocations: 84.41 kB / 0.7819 GB, free: 3.43 MB / 0.6387 GB Notification: Performance of preOpt expandDerOperator (simulation): time 6.296e-05/2.323, allocations: 36 kB / 0.782 GB, free: 3.395 MB / 0.6387 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007526/2.324, allocations: 420.7 kB / 0.7824 GB, free: 2.953 MB / 0.6387 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.832e-05/2.324, allocations: 0 / 0.7824 GB, free: 2.953 MB / 0.6387 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.844e-05/2.324, allocations: 19.98 kB / 0.7824 GB, free: 2.934 MB / 0.6387 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.094e-05/2.324, allocations: 8 kB / 0.7824 GB, free: 2.926 MB / 0.6387 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005887/2.325, allocations: 278.4 kB / 0.7827 GB, free: 2.656 MB / 0.6387 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001822/2.326, allocations: 1.217 MB / 0.7839 GB, free: 1.391 MB / 0.6387 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006285/2.327, allocations: 213.5 kB / 0.7841 GB, free: 1.176 MB / 0.6387 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001663/2.327, allocations: 72.83 kB / 0.7841 GB, free: 1.102 MB / 0.6387 GB Notification: Performance of preOpt evalFunc (simulation): time 0.4143/2.742, allocations: 69.09 MB / 0.8516 GB, free: 301.7 MB / 0.6856 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0003064/2.742, allocations: 138.7 kB / 0.8517 GB, free: 301.7 MB / 0.6856 GB Notification: Performance of pre-optimization done (n=21): time 2.124e-06/2.742, allocations: 0 / 0.8517 GB, free: 301.7 MB / 0.6856 GB Notification: Performance of matching and sorting (n=21): time 0.00092/2.743, allocations: 334.8 kB / 0.8521 GB, free: 301.6 MB / 0.6856 GB Notification: Performance of inlineWhenForInitialization (initialization): time 1.96e-05/2.743, allocations: 54.38 kB / 0.8521 GB, free: 301.6 MB / 0.6856 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003187/2.743, allocations: 360.1 kB / 0.8525 GB, free: 301.5 MB / 0.6856 GB Notification: Performance of collectPreVariables (initialization): time 1.725e-05/2.743, allocations: 25.7 kB / 0.8525 GB, free: 301.4 MB / 0.6856 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001062/2.743, allocations: 252.2 kB / 0.8527 GB, free: 301.3 MB / 0.6856 GB Notification: Performance of collectInitialBindings (initialization): time 4.13e-05/2.743, allocations: 81.11 kB / 0.8528 GB, free: 301.3 MB / 0.6856 GB Notification: Performance of simplifyInitialFunctions (initialization): time 9.609e-05/2.743, allocations: 82.84 kB / 0.8529 GB, free: 301.2 MB / 0.6856 GB Notification: Performance of setup shared object (initialization): time 5.673e-05/2.743, allocations: 342.7 kB / 0.8532 GB, free: 300.9 MB / 0.6856 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001661/2.744, allocations: 81.55 kB / 0.8533 GB, free: 300.9 MB / 0.6856 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001929/2.744, allocations: 174.7 kB / 0.8534 GB, free: 300.8 MB / 0.6856 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0003219/2.744, allocations: 259 kB / 0.8537 GB, free: 300.7 MB / 0.6856 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.446e-06/2.744, allocations: 3.75 kB / 0.8537 GB, free: 300.7 MB / 0.6856 GB Notification: Performance of matching and sorting (n=39) (initialization): time 0.0007138/2.745, allocations: 390.2 kB / 0.8541 GB, free: 300.6 MB / 0.6856 GB Notification: Performance of prepare postOptimizeDAE: time 1.476e-05/2.745, allocations: 3.781 kB / 0.8541 GB, free: 300.6 MB / 0.6856 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.344e-06/2.745, allocations: 7.844 kB / 0.8541 GB, free: 300.6 MB / 0.6856 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009251/2.746, allocations: 164.6 kB / 0.8542 GB, free: 300.6 MB / 0.6856 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001785/2.746, allocations: 55.69 kB / 0.8543 GB, free: 300.6 MB / 0.6856 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00174/2.748, allocations: 2.252 MB / 0.8565 GB, free: 298.7 MB / 0.6856 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002322/2.748, allocations: 41.89 kB / 0.8565 GB, free: 298.7 MB / 0.6856 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.403e-05/2.748, allocations: 19.81 kB / 0.8565 GB, free: 298.7 MB / 0.6856 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * Number of states: 0 () * Number of discrete variables: 9 (sourceP1.C.ftype,puitsP1.fluid,checkValve.fluid,checkValve.libre,$whenCondition1,$whenCondition2,sourceP1.fluid1,sourceP1.C.diff_on_2,checkValve.C2.diff_on_1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (33): * Single equations (assignments): 31 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 2 systems {(1,2), (1,4)} Notification: Performance of prepare postOptimizeDAE: time 0.0001439/2.748, allocations: 171.8 kB / 0.8567 GB, free: 298.5 MB / 0.6856 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.261e-05/2.748, allocations: 34.61 kB / 0.8567 GB, free: 298.5 MB / 0.6856 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006229/2.749, allocations: 320.1 kB / 0.857 GB, free: 298.4 MB / 0.6856 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.496e-06/2.749, allocations: 7.438 kB / 0.8571 GB, free: 298.4 MB / 0.6856 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.784e-06/2.749, allocations: 0.6562 kB / 0.8571 GB, free: 298.4 MB / 0.6856 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.168e-06/2.749, allocations: 3.75 kB / 0.8571 GB, free: 298.4 MB / 0.6856 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0002354/2.749, allocations: 278.9 kB / 0.8573 GB, free: 298.3 MB / 0.6856 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.533e-06/2.749, allocations: 0.6562 kB / 0.8573 GB, free: 298.3 MB / 0.6856 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002478/2.749, allocations: 49.97 kB / 0.8574 GB, free: 298.3 MB / 0.6856 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003981/2.75, allocations: 87.41 kB / 0.8575 GB, free: 298.3 MB / 0.6856 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.709e-05/2.75, allocations: 0 / 0.8575 GB, free: 298.3 MB / 0.6856 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0002868/2.75, allocations: 0.5733 MB / 0.858 GB, free: 297.8 MB / 0.6856 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.152e-06/2.75, allocations: 0 / 0.858 GB, free: 297.8 MB / 0.6856 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006404/2.751, allocations: 377.9 kB / 0.8584 GB, free: 297.7 MB / 0.6856 GB Notification: Performance of postOpt removeConstants (simulation): time 0.000119/2.751, allocations: 63.53 kB / 0.8584 GB, free: 297.6 MB / 0.6856 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.767e-05/2.751, allocations: 11.38 kB / 0.8584 GB, free: 297.6 MB / 0.6856 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001551/2.751, allocations: 15.34 kB / 0.8585 GB, free: 297.6 MB / 0.6856 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.372e-05/2.751, allocations: 28.31 kB / 0.8585 GB, free: 297.6 MB / 0.6856 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.787e-05/2.751, allocations: 4.844 kB / 0.8585 GB, free: 297.6 MB / 0.6856 GB Notification: Performance of sorting global known variables: time 0.000188/2.751, allocations: 243.6 kB / 0.8587 GB, free: 297.5 MB / 0.6856 GB Notification: Performance of sort global known variables: time 9.1e-08/2.751, allocations: 4.062 kB / 0.8587 GB, free: 297.5 MB / 0.6856 GB Notification: Performance of remove unused functions: time 0.002827/2.754, allocations: 1.496 MB / 0.8602 GB, free: 297.5 MB / 0.6856 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 2 (checkValve.omega,checkValve.theta) * Number of discrete variables: 3 ($whenCondition2,$whenCondition1,checkValve.libre) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (20): * Single equations (assignments): 19 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.004601/2.759, allocations: 2.218 MB / 0.8624 GB, free: 296.6 MB / 0.6856 GB Notification: Performance of simCode: created initialization part: time 0.0006685/2.759, allocations: 352.6 kB / 0.8627 GB, free: 296.3 MB / 0.6856 GB Notification: Performance of simCode: created event and clocks part: time 2.234e-06/2.759, allocations: 0 / 0.8627 GB, free: 296.3 MB / 0.6856 GB Notification: Performance of simCode: created simulation system equations: time 0.0002417/2.76, allocations: 108.7 kB / 0.8628 GB, free: 296.2 MB / 0.6856 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003924/2.76, allocations: 72.98 kB / 0.8629 GB, free: 296.2 MB / 0.6856 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0012/2.761, allocations: 0.8309 MB / 0.8637 GB, free: 295.4 MB / 0.6856 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001469/2.761, allocations: 216.2 kB / 0.8639 GB, free: 295.1 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.0001466/2.761, allocations: 38.97 kB / 0.8639 GB, free: 295.1 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 6.207e-05/2.761, allocations: 35.06 kB / 0.864 GB, free: 295.1 MB / 0.6856 GB Notification: Performance of SimCode: time 4.2e-07/2.761, allocations: 0 / 0.864 GB, free: 295.1 MB / 0.6856 GB Notification: Performance of Templates: time 0.04611/2.808, allocations: 47.67 MB / 0.9105 GB, free: 248.1 MB / 0.6856 GB " [Timeout remaining time 657] make -j1 -f ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.makefile [Timeout 660] (rm -f ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.pipe ; mkfifo ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.pipe ; head -c 1048576 < ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.pipe >> ../files/ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.sim & ./ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve -abortSlowSimulation -alarm=480 -lv LOG_STATS > ThermoSysPro_ThermoSysPro.Fluid.Examples.Book.SimpleExamples.PressureLoss.TestDynamicCheckValve.pipe 2>&1) [Timeout 480] [Calling sys.exit(0), Time elapsed: 14.40730362571776] Failed to read output from testmodel.py, exit status != 0: 2.9360306318849325 2.944625977 0.625513751 Calling exit ...