Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo", uses=false) Using package IBPSA with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: "" <> buildModelFMU(IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Movers_Validation_PumpCurveDerivatives",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Movers_Validation_PumpCurveDerivatives",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001012/0.001012, allocations: 101.7 kB / 16.27 MB, free: 5.984 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001026/0.001026, allocations: 188.4 kB / 17.19 MB, free: 5.613 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.259/1.259, allocations: 222.9 MB / 240.9 MB, free: 15.2 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.6965/0.6965, allocations: 122.9 MB / 413.9 MB, free: 15.91 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001293/0.001293, allocations: 59.91 kB / 0.4912 GB, free: 7.355 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3036/0.3049, allocations: 77.92 MB / 0.5673 GB, free: 32.7 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives): time 0.06335/0.3683, allocations: 79.34 MB / 0.6448 GB, free: 11.29 MB / 494.1 MB Notification: Performance of NFInst.instExpressions: time 0.03753/0.4059, allocations: 28.39 MB / 0.6725 GB, free: 14.82 MB / 0.5137 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004028/0.4099, allocations: 119.4 kB / 0.6726 GB, free: 14.71 MB / 0.5137 GB Notification: Performance of NFTyping.typeComponents: time 0.01752/0.4275, allocations: 11.47 MB / 0.6838 GB, free: 3.219 MB / 0.5137 GB Notification: Performance of NFTyping.typeBindings: time 0.009196/0.4367, allocations: 3.766 MB / 0.6875 GB, free: 15.44 MB / 0.5294 GB Notification: Performance of NFTyping.typeClassSections: time 0.006974/0.4437, allocations: 3.075 MB / 0.6905 GB, free: 12.38 MB / 0.5294 GB Notification: Performance of NFFlatten.flatten: time 0.02717/0.4709, allocations: 20.14 MB / 0.7101 GB, free: 8.23 MB / 0.545 GB Notification: Performance of NFFlatten.resolveConnections: time 0.005411/0.4763, allocations: 2.723 MB / 0.7128 GB, free: 5.445 MB / 0.545 GB Notification: Performance of NFEvalConstants.evaluate: time 0.007416/0.4837, allocations: 3.079 MB / 0.7158 GB, free: 2.367 MB / 0.545 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004306/0.4881, allocations: 2.524 MB / 0.7183 GB, free: 15.83 MB / 0.5606 GB Notification: Performance of NFPackage.collectConstants: time 0.001444/0.4895, allocations: 360 kB / 0.7186 GB, free: 15.48 MB / 0.5606 GB Notification: Performance of NFFlatten.collectFunctions: time 0.006505/0.4961, allocations: 2.933 MB / 0.7215 GB, free: 12.54 MB / 0.5606 GB Notification: Performance of NFScalarize.scalarize: time 0.002088/0.4982, allocations: 1.792 MB / 0.7232 GB, free: 10.75 MB / 0.5606 GB Notification: Performance of NFVerifyModel.verify: time 0.004207/0.5024, allocations: 2.674 MB / 0.7258 GB, free: 8.059 MB / 0.5606 GB Notification: Performance of NFConvertDAE.convert: time 0.01125/0.5137, allocations: 8.358 MB / 0.734 GB, free: 15.68 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 5.811e-06/0.5137, allocations: 0 / 0.734 GB, free: 15.68 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.363e-06/0.5137, allocations: 0 / 0.734 GB, free: 15.68 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 0.0002121/0.5139, allocations: 0 / 0.734 GB, free: 15.68 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 405 * Number of variables: 405 Notification: Performance of Generate backend data structure: time 0.01182/0.5258, allocations: 5.928 MB / 0.7398 GB, free: 9.648 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.766e-05/0.5258, allocations: 8.625 kB / 0.7398 GB, free: 9.641 MB / 0.5762 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003261/0.5261, allocations: 232.2 kB / 0.74 GB, free: 9.402 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.008318/0.5345, allocations: 1.547 MB / 0.7415 GB, free: 7.848 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.2304/0.7649, allocations: 8.299 MB / 0.7496 GB, free: 158.5 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000537/0.7654, allocations: 207.4 kB / 0.7498 GB, free: 158.5 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0005613/0.766, allocations: 189.6 kB / 0.75 GB, free: 158.5 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.005218/0.7712, allocations: 2.621 MB / 0.7526 GB, free: 157.6 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.278e-05/0.7713, allocations: 7.938 kB / 0.7526 GB, free: 157.6 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001827/0.7715, allocations: 71.22 kB / 0.7526 GB, free: 157.6 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.697e-05/0.7715, allocations: 40.44 kB / 0.7527 GB, free: 157.6 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.006257/0.7778, allocations: 2.032 MB / 0.7547 GB, free: 157 MB / 0.5762 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 0.01779/0.7956, allocations: 12.19 MB / 0.7666 GB, free: 149.6 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.004738/0.8004, allocations: 1.744 MB / 0.7683 GB, free: 149.1 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001927/0.8023, allocations: 0.8152 MB / 0.7691 GB, free: 148.7 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.005365/0.8077, allocations: 4.227 MB / 0.7732 GB, free: 145.3 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.362e-05/0.8077, allocations: 45.78 kB / 0.7732 GB, free: 145.2 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=82): time 2.836e-06/0.8077, allocations: 0 / 0.7732 GB, free: 145.2 MB / 0.5762 GB Notification: Performance of matching and sorting (n=82): time 0.008014/0.8158, allocations: 2.829 MB / 0.776 GB, free: 143.9 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.625e-05/0.8158, allocations: 59.84 kB / 0.7761 GB, free: 143.8 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.008972/0.8248, allocations: 7.058 MB / 0.783 GB, free: 140.3 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.0003905/0.8252, allocations: 53.64 kB / 0.783 GB, free: 140.2 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.001227/0.8264, allocations: 2.028 MB / 0.785 GB, free: 138.5 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002904/0.8267, allocations: 317.8 kB / 0.7853 GB, free: 138.2 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0008428/0.8276, allocations: 0.7542 MB / 0.786 GB, free: 137.8 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 3.163e-05/0.8276, allocations: 305.1 kB / 0.7863 GB, free: 137.5 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003164/0.8308, allocations: 2.188 MB / 0.7885 GB, free: 136.5 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003426/0.8342, allocations: 3.085 MB / 0.7915 GB, free: 134.4 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.005924/0.8402, allocations: 4.893 MB / 0.7962 GB, free: 130 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.439e-05/0.8402, allocations: 8 kB / 0.7963 GB, free: 130 MB / 0.5762 GB Notification: Performance of matching and sorting (n=432) (initialization): time 0.008441/0.8487, allocations: 5.957 MB / 0.8021 GB, free: 124.1 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.758e-05/0.8487, allocations: 12 kB / 0.8021 GB, free: 124.1 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.517e-05/0.8487, allocations: 27.94 kB / 0.8021 GB, free: 124.1 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.000702/0.8494, allocations: 416.6 kB / 0.8025 GB, free: 123.7 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00218/0.8516, allocations: 0.6195 MB / 0.8031 GB, free: 123.1 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0006308/0.8523, allocations: 0.8957 MB / 0.804 GB, free: 122.1 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003344/0.8556, allocations: 424.8 kB / 0.8044 GB, free: 121.7 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000293/0.8559, allocations: 167.9 kB / 0.8046 GB, free: 121.6 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.004037/0.86, allocations: 3.019 MB / 0.8075 GB, free: 118.6 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002967/0.863, allocations: 2.869 MB / 0.8103 GB, free: 115.4 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.005204/0.8682, allocations: 4.449 MB / 0.8146 GB, free: 110.6 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.071e-05/0.8682, allocations: 4 kB / 0.8147 GB, free: 110.6 MB / 0.5762 GB Notification: Performance of matching and sorting (n=432) (initialization_lambda0): time 0.007911/0.8761, allocations: 5.529 MB / 0.8201 GB, free: 105.1 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.91e-05/0.8762, allocations: 19.94 kB / 0.8201 GB, free: 105.1 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.977e-05/0.8762, allocations: 23.94 kB / 0.8201 GB, free: 105 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0008762/0.8771, allocations: 457.3 kB / 0.8205 GB, free: 104.6 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002015/0.8791, allocations: 0.6045 MB / 0.8211 GB, free: 104 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006062/0.8852, allocations: 6.115 MB / 0.8271 GB, free: 97.67 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003401/0.8886, allocations: 335.2 kB / 0.8274 GB, free: 97.34 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002214/0.8888, allocations: 155.9 kB / 0.8276 GB, free: 97.18 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 98 * 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 (305): * Single equations (assignments): 295 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 6 * 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 0.0004744/0.8893, allocations: 342.3 kB / 0.8279 GB, free: 96.84 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005706/0.8899, allocations: 438.1 kB / 0.8283 GB, free: 96.41 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00547/0.8954, allocations: 2.501 MB / 0.8307 GB, free: 93.92 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.51e-05/0.8954, allocations: 11.98 kB / 0.8308 GB, free: 93.91 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.788e-06/0.8954, allocations: 0 / 0.8308 GB, free: 93.91 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.161e-05/0.8954, allocations: 7.984 kB / 0.8308 GB, free: 93.9 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.008381/0.9038, allocations: 5.292 MB / 0.8359 GB, free: 88.55 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.452e-06/0.9038, allocations: 3.984 kB / 0.8359 GB, free: 88.55 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001396/0.9052, allocations: 267.8 kB / 0.8362 GB, free: 88.29 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003193/0.9056, allocations: 168.7 kB / 0.8364 GB, free: 88.12 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.745e-05/0.9057, allocations: 39.95 kB / 0.8364 GB, free: 88.08 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000482/0.9062, allocations: 0.7982 MB / 0.8372 GB, free: 87.26 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.583e-06/0.9062, allocations: 0 / 0.8372 GB, free: 87.26 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007414/0.9136, allocations: 3.455 MB / 0.8405 GB, free: 83.77 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001754/0.9154, allocations: 0.7838 MB / 0.8413 GB, free: 82.96 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0006989/0.9161, allocations: 20 kB / 0.8413 GB, free: 82.94 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002058/0.9182, allocations: 147.8 kB / 0.8415 GB, free: 82.79 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001322/0.9183, allocations: 69.7 kB / 0.8415 GB, free: 82.72 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001066/0.9184, allocations: 55.94 kB / 0.8416 GB, free: 82.67 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.004927/0.9234, allocations: 4.931 MB / 0.8464 GB, free: 77.77 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.7e-07/0.9234, allocations: 0 / 0.8464 GB, free: 77.77 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.004498/0.9279, allocations: 2.078 MB / 0.8484 GB, free: 75.75 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 3 (ddp_dm_flow.x,ddp_dy.x,dm_flow_dy.x) * 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 (96): * Single equations (assignments): 87 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 8 * 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 {(1,5)} Notification: Performance of Backend phase and start with SimCode phase: time 0.008262/0.9361, allocations: 4.739 MB / 0.8531 GB, free: 71.1 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.009547/0.9457, allocations: 6.287 MB / 0.8592 GB, free: 64.82 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 6.162e-06/0.9457, allocations: 4 kB / 0.8592 GB, free: 64.82 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.002067/0.9478, allocations: 0.888 MB / 0.8601 GB, free: 63.94 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.008696/0.9565, allocations: 2.378 MB / 0.8624 GB, free: 61.68 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.06317/1.02, allocations: 52.87 MB / 0.914 GB, free: 5.441 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001812/1.022, allocations: 2.667 MB / 0.9166 GB, free: 2.742 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.004825/1.026, allocations: 1.215 MB / 0.9178 GB, free: 1.52 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.00283/1.029, allocations: 1.993 MB / 0.9198 GB, free: 15.54 MB / 0.5919 GB Notification: Performance of SimCode: time 1.643e-06/1.029, allocations: 0 / 0.9198 GB, free: 15.54 MB / 0.5919 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.4365/1.466, allocations: 137.6 MB / 1.054 GB, free: 182.2 MB / 0.6544 GB Notification: Performance of buildModelFMU: Generate platform static: time 14.35/15.82, allocations: 5.547 kB / 1.054 GB, free: 182.2 MB / 0.6544 GB (rm -f IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives.sim & python3 -m fmpy simulate --output-file IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives_res.csv --start-time 0 --stop-time 1 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.0004 IBPSA_latest_IBPSA_Fluid_Movers_Validation_PumpCurveDerivatives.fmu > IBPSA_latest_IBPSA.Fluid.Movers.Validation.PumpCurveDerivatives.pipe 2>&1)