Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.0007682/0.0007682, allocations: 80.44 kB / 19.17 MB, free: 0.7422 MB / 13.93 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.0007525/0.0007525, allocations: 165.9 kB / 22.46 MB, free: 2.105 MB / 18.57 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 0.8892/0.8892, allocations: 177.1 MB / 202.8 MB, free: 5.754 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 master/package.mo): time 0.002215/0.002215, allocations: 233.9 kB / 259.4 MB, free: 13.04 MB / 250.7 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/package.mo): time 0.6903/0.6903, allocations: 138.4 MB / 454.3 MB, free: 30.03 MB / 410.7 MB " [Timeout remaining time 179] Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 master/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: "" <> buildModelFMU(BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate,fileNamePrefix="BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate,fileNamePrefix="BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.813e-06/1.813e-06, allocations: 0 / 0.6463 GB, free: 1.855 MB / 0.5573 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.764e-05/1.946e-05, allocations: 5.094 kB / 0.6463 GB, free: 1.852 MB / 0.5573 GB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate): time 0.3793/0.3793, allocations: 168.3 MB / 0.8107 GB, free: 2.727 MB / 0.6355 GB Notification: Performance of NFInst.instExpressions: time 0.007136/0.3865, allocations: 5.448 MB / 0.816 GB, free: 13.27 MB / 0.6511 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001201/0.3877, allocations: 51.56 kB / 0.8161 GB, free: 13.22 MB / 0.6511 GB Notification: Performance of NFTyping.typeComponents: time 0.001204/0.3889, allocations: 0.5589 MB / 0.8166 GB, free: 12.66 MB / 0.6511 GB Notification: Performance of NFTyping.typeBindings: time 0.00314/0.392, allocations: 1.737 MB / 0.8183 GB, free: 10.91 MB / 0.6511 GB Notification: Performance of NFTyping.typeClassSections: time 0.002234/0.3942, allocations: 1.268 MB / 0.8195 GB, free: 9.652 MB / 0.6511 GB Notification: Performance of NFFlatten.flatten: time 0.002678/0.3969, allocations: 2.646 MB / 0.8221 GB, free: 6.996 MB / 0.6511 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0008762/0.3978, allocations: 0.6865 MB / 0.8228 GB, free: 6.305 MB / 0.6511 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001836/0.3996, allocations: 1.406 MB / 0.8242 GB, free: 4.895 MB / 0.6511 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001423/0.4011, allocations: 0.7581 MB / 0.8249 GB, free: 4.145 MB / 0.6511 GB Notification: Performance of NFPackage.collectConstants: time 0.0001423/0.4012, allocations: 96 kB / 0.825 GB, free: 4.051 MB / 0.6511 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001854/0.403, allocations: 1.297 MB / 0.8263 GB, free: 2.75 MB / 0.6511 GB Notification: Performance of NFScalarize.scalarize: time 0.0003462/0.4034, allocations: 446.6 kB / 0.8267 GB, free: 2.312 MB / 0.6511 GB Notification: Performance of NFVerifyModel.verify: time 0.0004966/0.4039, allocations: 423.1 kB / 0.8271 GB, free: 1.898 MB / 0.6511 GB Notification: Performance of NFConvertDAE.convert: time 0.002372/0.4063, allocations: 2.072 MB / 0.8291 GB, free: 15.82 MB / 0.6667 GB Notification: Performance of FrontEnd - DAE generated: time 5.57e-06/0.4063, allocations: 0 / 0.8291 GB, free: 15.82 MB / 0.6667 GB Notification: Performance of FrontEnd: time 1.994e-06/0.4063, allocations: 0 / 0.8291 GB, free: 15.82 MB / 0.6667 GB Notification: Performance of Transformations before backend: time 1.188e-05/0.4063, allocations: 0 / 0.8291 GB, free: 15.82 MB / 0.6667 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 187 * Number of variables: 187 Notification: Performance of Generate backend data structure: time 0.001543/0.4078, allocations: 1.387 MB / 0.8305 GB, free: 14.4 MB / 0.6667 GB Notification: Performance of prepare preOptimizeDAE: time 4.294e-05/0.4079, allocations: 12.75 kB / 0.8305 GB, free: 14.39 MB / 0.6667 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001086/0.408, allocations: 122.6 kB / 0.8306 GB, free: 14.26 MB / 0.6667 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001386/0.4094, allocations: 422.9 kB / 0.831 GB, free: 13.84 MB / 0.6667 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001026/0.4104, allocations: 0.7311 MB / 0.8317 GB, free: 13.09 MB / 0.6667 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.013e-05/0.4104, allocations: 58 kB / 0.8318 GB, free: 13.03 MB / 0.6667 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.255e-05/0.4105, allocations: 75.98 kB / 0.8319 GB, free: 12.95 MB / 0.6667 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001332/0.4118, allocations: 1.355 MB / 0.8332 GB, free: 11.49 MB / 0.6667 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.854e-05/0.4119, allocations: 0 / 0.8332 GB, free: 11.49 MB / 0.6667 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.789e-05/0.4119, allocations: 35.94 kB / 0.8332 GB, free: 11.45 MB / 0.6667 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.172e-05/0.412, allocations: 33.98 kB / 0.8332 GB, free: 11.42 MB / 0.6667 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001145/0.4131, allocations: 0.8626 MB / 0.8341 GB, free: 10.55 MB / 0.6667 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.003573/0.4167, allocations: 2.787 MB / 0.8368 GB, free: 7.703 MB / 0.6667 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0009109/0.4176, allocations: 0.578 MB / 0.8374 GB, free: 7.117 MB / 0.6667 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004079/0.418, allocations: 322.6 kB / 0.8377 GB, free: 6.801 MB / 0.6667 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001082/0.4181, allocations: 24.25 kB / 0.8377 GB, free: 6.777 MB / 0.6667 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.364e-05/0.4181, allocations: 39.22 kB / 0.8377 GB, free: 6.73 MB / 0.6667 GB Notification: Performance of pre-optimization done (n=39): time 2.925e-06/0.4181, allocations: 0 / 0.8377 GB, free: 6.73 MB / 0.6667 GB Notification: Performance of matching and sorting (n=41): time 0.004368/0.4225, allocations: 2.253 MB / 0.8399 GB, free: 4.441 MB / 0.6667 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.617e-05/0.4225, allocations: 55.41 kB / 0.84 GB, free: 4.375 MB / 0.6667 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008313/0.4234, allocations: 0.8018 MB / 0.8408 GB, free: 3.566 MB / 0.6667 GB Notification: Performance of collectPreVariables (initialization): time 5.445e-05/0.4234, allocations: 33.7 kB / 0.8408 GB, free: 3.527 MB / 0.6667 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002267/0.4237, allocations: 464.4 kB / 0.8413 GB, free: 3.07 MB / 0.6667 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001025/0.4238, allocations: 146.7 kB / 0.8414 GB, free: 2.926 MB / 0.6667 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.00013/0.4239, allocations: 102.3 kB / 0.8415 GB, free: 2.82 MB / 0.6667 GB Notification: Performance of setup shared object (initialization): time 7.786e-05/0.424, allocations: 330 kB / 0.8418 GB, free: 2.492 MB / 0.6667 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004278/0.4244, allocations: 301.1 kB / 0.8421 GB, free: 2.195 MB / 0.6667 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004859/0.4249, allocations: 464.5 kB / 0.8425 GB, free: 1.691 MB / 0.6667 GB Warning: It was not possible to determine if the initialization problem is consistent, because of not evaluable parameters/start values during compile time: volDyn.dynBal.medium.p = volDyn.dynBal.p_start (bou.p = volDyn.dynBal.p_start) Notification: Performance of analyzeInitialSystem (initialization): time 0.002895/0.4278, allocations: 1.81 MB / 0.8443 GB, free: 15.85 MB / 0.6823 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.258e-06/0.4278, allocations: 0 / 0.8443 GB, free: 15.85 MB / 0.6823 GB Notification: Performance of matching and sorting (n=63) (initialization): time 0.001716/0.4295, allocations: 1.04 MB / 0.8453 GB, free: 14.8 MB / 0.6823 GB Notification: Performance of prepare postOptimizeDAE: time 2.069e-05/0.4295, allocations: 5.875 kB / 0.8453 GB, free: 14.8 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.055e-05/0.4295, allocations: 4 kB / 0.8453 GB, free: 14.8 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0003682/0.4299, allocations: 197.6 kB / 0.8455 GB, free: 14.61 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003591/0.4302, allocations: 139.8 kB / 0.8457 GB, free: 14.47 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002326/0.4326, allocations: 2.101 MB / 0.8477 GB, free: 12.26 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005432/0.4331, allocations: 51.88 kB / 0.8478 GB, free: 12.21 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.774e-05/0.4332, allocations: 20 kB / 0.8478 GB, free: 12.19 MB / 0.6823 GB Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization system: volDyn.dynBal.medium.p = volDyn.dynBal.p_start. Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 12 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (59): * Single equations (assignments): 58 * 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 {(1,4)} Notification: Performance of prepare postOptimizeDAE: time 0.0003521/0.4335, allocations: 277.6 kB / 0.848 GB, free: 11.91 MB / 0.6823 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001223/0.4336, allocations: 91.44 kB / 0.8481 GB, free: 11.82 MB / 0.6823 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001172/0.4337, allocations: 103.3 kB / 0.8482 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.397e-06/0.4338, allocations: 4 kB / 0.8482 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.845e-06/0.4338, allocations: 0 / 0.8482 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00142/0.4352, allocations: 0.8912 MB / 0.8491 GB, free: 10.78 MB / 0.6823 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00286/0.438, allocations: 1.937 MB / 0.851 GB, free: 8.75 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.937e-06/0.438, allocations: 4 kB / 0.851 GB, free: 8.746 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003147/0.4384, allocations: 132.2 kB / 0.8511 GB, free: 8.617 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.000307/0.4387, allocations: 184.7 kB / 0.8513 GB, free: 8.434 MB / 0.6823 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.877e-05/0.4387, allocations: 19.92 kB / 0.8513 GB, free: 8.414 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001929/0.4406, allocations: 2.06 MB / 0.8533 GB, free: 6.246 MB / 0.6823 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.705e-06/0.4406, allocations: 4 kB / 0.8533 GB, free: 6.242 MB / 0.6823 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002097/0.4427, allocations: 1.414 MB / 0.8547 GB, free: 4.77 MB / 0.6823 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003407/0.4431, allocations: 167.3 kB / 0.8549 GB, free: 4.605 MB / 0.6823 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.547e-05/0.4431, allocations: 15.88 kB / 0.8549 GB, free: 4.59 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004202/0.4435, allocations: 62.59 kB / 0.8549 GB, free: 4.531 MB / 0.6823 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.56e-05/0.4436, allocations: 39.88 kB / 0.855 GB, free: 4.492 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.668e-05/0.4437, allocations: 29.39 kB / 0.855 GB, free: 4.465 MB / 0.6823 GB Notification: Performance of sorting global known variables: time 0.0005041/0.4442, allocations: 0.5614 MB / 0.8556 GB, free: 3.91 MB / 0.6823 GB Notification: Performance of sort global known variables: time 7e-08/0.4442, allocations: 4 kB / 0.8556 GB, free: 3.906 MB / 0.6823 GB Notification: Performance of remove unused functions: time 0.0006494/0.4448, allocations: 275.9 kB / 0.8558 GB, free: 3.637 MB / 0.6823 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 14 * Number of states: 2 (volDyn.dynBal.medium.Xi[1],volDyn.dynBal.U) * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (37): * Single equations (assignments): 36 * 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 {(1,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002421/0.4472, allocations: 2.043 MB / 0.8578 GB, free: 1.523 MB / 0.6823 GB Notification: Performance of simCode: created initialization part: time 0.001184/0.4484, allocations: 0.7824 MB / 0.8586 GB, free: 0.7266 MB / 0.6823 GB Notification: Performance of simCode: created event and clocks part: time 5.45e-06/0.4484, allocations: 4 kB / 0.8586 GB, free: 0.7227 MB / 0.6823 GB Notification: Performance of simCode: created simulation system equations: time 0.0005028/0.4489, allocations: 444.7 kB / 0.859 GB, free: 284 kB / 0.6823 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001443/0.4504, allocations: 0.5584 MB / 0.8596 GB, free: 15.77 MB / 0.698 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.009259/0.4596, allocations: 7.623 MB / 0.867 GB, free: 7.855 MB / 0.698 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003167/0.46, allocations: 458.5 kB / 0.8674 GB, free: 7.383 MB / 0.698 GB Notification: Performance of simCode: alias equations: time 0.0005808/0.4605, allocations: 199.2 kB / 0.8676 GB, free: 7.184 MB / 0.698 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003227/0.4609, allocations: 316.4 kB / 0.8679 GB, free: 6.875 MB / 0.698 GB Notification: Performance of SimCode: time 1.263e-06/0.4609, allocations: 0 / 0.8679 GB, free: 6.875 MB / 0.698 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04096/0.5018, allocations: 30.35 MB / 0.8976 GB, free: 9.266 MB / 0.7292 GB Notification: Performance of buildModelFMU: Generate platform static: time 8.153/8.654, allocations: 5.281 kB / 0.8976 GB, free: 9.262 MB / 0.7292 GB " [Timeout remaining time 651] (rm -f BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate_fmu --startTime=0 --stopTime=10 --stepSize=0.004 --timeout=50 --tolerance=1e-06 BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.fmu > BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 11.260939639993012] Failed to read output from testmodel.py, exit status != 0: 8.757571840658784 8.765886209 8.357583832 Calling exit ...