Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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: translateModel(ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume") translateModel(ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.008137/0.008137, allocations: 99.34 kB / 15.73 MB, free: 6.008 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001923/0.001923, allocations: 194.3 kB / 16.67 MB, free: 5.938 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.737/1.737, allocations: 205.1 MB / 222.5 MB, free: 4.492 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo): time 0.439/0.439, allocations: 37.99 MB / 307.9 MB, free: 10.14 MB / 254.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: ModelicaTest requested package Modelica of version 3.2.1. Modelica 3.2.3 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001802/0.001803, allocations: 71.91 kB / 433 MB, free: 5.406 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4429/0.4447, allocations: 56.46 MB / 489.5 MB, free: 19.99 MB / 382.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume): time 0.7402/1.185, allocations: 209.9 MB / 0.683 GB, free: 1.234 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.02247/1.207, allocations: 13.64 MB / 0.6963 GB, free: 0.9805 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002105/1.21, allocations: 36.56 kB / 0.6963 GB, free: 0.9805 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.00201/1.212, allocations: 484.6 kB / 0.6968 GB, free: 0.9727 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.01156/1.223, allocations: 3.151 MB / 0.6999 GB, free: 0.8398 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.01135/1.235, allocations: 3.361 MB / 0.7032 GB, free: 0.7305 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.005768/1.24, allocations: 3.233 MB / 0.7063 GB, free: 0.6836 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001327/1.242, allocations: 0.7959 MB / 0.7071 GB, free: 0.6094 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002516/1.244, allocations: 1.255 MB / 0.7083 GB, free: 0.5078 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001838/1.246, allocations: 1.303 MB / 0.7096 GB, free: 268 kB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0002271/1.246, allocations: 114.4 kB / 0.7097 GB, free: 268 kB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.008532/1.255, allocations: 3.38 MB / 0.713 GB, free: 14.93 MB / 0.5137 GB Notification: Performance of NFScalarize.scalarize: time 0.0007062/1.256, allocations: 430.7 kB / 0.7134 GB, free: 14.64 MB / 0.5137 GB Notification: Performance of NFVerifyModel.verify: time 0.001255/1.257, allocations: 0.6439 MB / 0.714 GB, free: 14.24 MB / 0.5137 GB Notification: Performance of NFConvertDAE.convert: time 0.01172/1.269, allocations: 3.742 MB / 0.7177 GB, free: 12.16 MB / 0.5137 GB Notification: Performance of FrontEnd - DAE generated: time 6.492e-06/1.269, allocations: 0 / 0.7177 GB, free: 12.16 MB / 0.5137 GB Notification: Performance of FrontEnd: time 2.004e-06/1.269, allocations: 0.625 kB / 0.7177 GB, free: 12.16 MB / 0.5137 GB Notification: Performance of Transformations before backend: time 1.73e-05/1.269, allocations: 0 / 0.7177 GB, free: 12.16 MB / 0.5137 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 192 * Number of variables: 192 Notification: Performance of Generate backend data structure: time 0.004561/1.273, allocations: 2.03 MB / 0.7197 GB, free: 10.71 MB / 0.5137 GB Notification: Performance of prepare preOptimizeDAE: time 4.945e-05/1.273, allocations: 13.89 kB / 0.7197 GB, free: 10.7 MB / 0.5137 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001207/1.275, allocations: 229 kB / 0.7199 GB, free: 10.59 MB / 0.5137 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001514/1.276, allocations: 0.8445 MB / 0.7207 GB, free: 9.98 MB / 0.5137 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.505e-05/1.276, allocations: 62.3 kB / 0.7208 GB, free: 9.957 MB / 0.5137 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001373/1.276, allocations: 71.92 kB / 0.7209 GB, free: 9.938 MB / 0.5137 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002036/1.278, allocations: 1.241 MB / 0.7221 GB, free: 9.18 MB / 0.5137 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.417e-05/1.278, allocations: 2.531 kB / 0.7221 GB, free: 9.18 MB / 0.5137 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001079/1.278, allocations: 29.16 kB / 0.7221 GB, free: 9.164 MB / 0.5137 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001168/1.279, allocations: 90.25 kB / 0.7222 GB, free: 9.137 MB / 0.5137 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002007/1.281, allocations: 1.204 MB / 0.7234 GB, free: 8.551 MB / 0.5137 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 0.007353/1.288, allocations: 4.895 MB / 0.7281 GB, free: 4.031 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001259/1.289, allocations: 0.7501 MB / 0.7289 GB, free: 3.277 MB / 0.5137 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006072/1.29, allocations: 378.4 kB / 0.7292 GB, free: 2.906 MB / 0.5137 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001353/1.291, allocations: 1.303 MB / 0.7305 GB, free: 1.391 MB / 0.5137 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.606e-05/1.291, allocations: 40.09 kB / 0.7305 GB, free: 1.344 MB / 0.5137 GB Notification: Performance of pre-optimization done (n=68): time 2.294e-06/1.291, allocations: 0 / 0.7305 GB, free: 1.344 MB / 0.5137 GB Notification: Performance of matching and sorting (n=73): time 0.007627/1.299, allocations: 2.812 MB / 0.7333 GB, free: 14.48 MB / 0.5294 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001029/1.299, allocations: 223.2 kB / 0.7335 GB, free: 14.21 MB / 0.5294 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001166/1.3, allocations: 0.9399 MB / 0.7344 GB, free: 13.25 MB / 0.5294 GB Notification: Performance of collectPreVariables (initialization): time 7.132e-05/1.3, allocations: 44.23 kB / 0.7345 GB, free: 13.2 MB / 0.5294 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003532/1.301, allocations: 487.5 kB / 0.7349 GB, free: 12.73 MB / 0.5294 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002302/1.301, allocations: 274.9 kB / 0.7352 GB, free: 12.46 MB / 0.5294 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003559/1.301, allocations: 230.5 kB / 0.7354 GB, free: 12.23 MB / 0.5294 GB Notification: Performance of setup shared object (initialization): time 0.0001629/1.301, allocations: 342.9 kB / 0.7357 GB, free: 11.89 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007856/1.302, allocations: 438 kB / 0.7362 GB, free: 11.46 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009811/1.303, allocations: 0.6868 MB / 0.7368 GB, free: 10.67 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001654/1.305, allocations: 1.089 MB / 0.7379 GB, free: 9.52 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.377e-06/1.305, allocations: 0 / 0.7379 GB, free: 9.52 MB / 0.5294 GB Notification: Performance of matching and sorting (n=120) (initialization): time 0.002515/1.307, allocations: 1.478 MB / 0.7393 GB, free: 8.07 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 2.491e-05/1.307, allocations: 8 kB / 0.7393 GB, free: 8.062 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.002e-05/1.307, allocations: 8.719 kB / 0.7394 GB, free: 8.055 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.003367/1.311, allocations: 0.7346 MB / 0.7401 GB, free: 7.32 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006475/1.311, allocations: 178.1 kB / 0.7402 GB, free: 7.156 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002018/1.314, allocations: 1.287 MB / 0.7415 GB, free: 5.848 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001173/1.315, allocations: 43.97 kB / 0.7415 GB, free: 5.805 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001828/1.315, allocations: 91.97 kB / 0.7416 GB, free: 5.715 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001186/1.316, allocations: 0.6112 MB / 0.7422 GB, free: 5.098 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001047/1.317, allocations: 0.657 MB / 0.7429 GB, free: 4.328 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001806/1.319, allocations: 1.023 MB / 0.7439 GB, free: 3.234 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 8.496e-06/1.319, allocations: 4 kB / 0.7439 GB, free: 3.23 MB / 0.5294 GB Notification: Performance of matching and sorting (n=120) (initialization_lambda0): time 0.002681/1.322, allocations: 1.338 MB / 0.7452 GB, free: 1.922 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 2.17e-05/1.322, allocations: 15.58 kB / 0.7452 GB, free: 1.91 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.311e-05/1.322, allocations: 8 kB / 0.7452 GB, free: 1.902 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001472/1.323, allocations: 356.7 kB / 0.7455 GB, free: 1.551 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006802/1.324, allocations: 204.8 kB / 0.7457 GB, free: 1.363 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001113/1.325, allocations: 0.9865 MB / 0.7467 GB, free: 364 kB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009519/1.326, allocations: 56.03 kB / 0.7468 GB, free: 308 kB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001586/1.326, allocations: 87.98 kB / 0.7468 GB, free: 220 kB / 0.5294 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 28 * 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 (91): * Single equations (assignments): 90 * 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 {(2,28)} Notification: Performance of prepare postOptimizeDAE: time 0.0004615/1.327, allocations: 245 kB / 0.7471 GB, free: 15.98 MB / 0.545 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002901/1.327, allocations: 119.2 kB / 0.7472 GB, free: 15.87 MB / 0.545 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002882/1.33, allocations: 1.372 MB / 0.7485 GB, free: 14.49 MB / 0.545 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.159e-05/1.33, allocations: 8 kB / 0.7485 GB, free: 14.48 MB / 0.545 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 9.608e-06/1.33, allocations: 0 / 0.7485 GB, free: 14.48 MB / 0.545 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.233e-05/1.33, allocations: 3.984 kB / 0.7485 GB, free: 14.48 MB / 0.545 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003689/1.334, allocations: 2.156 MB / 0.7506 GB, free: 12.27 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.414e-06/1.334, allocations: 3.984 kB / 0.7506 GB, free: 12.27 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007271/1.334, allocations: 179.6 kB / 0.7508 GB, free: 12.1 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (simulation): time 9.475e-05/1.334, allocations: 24.84 kB / 0.7508 GB, free: 12.07 MB / 0.545 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.195e-05/1.335, allocations: 28.17 kB / 0.7509 GB, free: 12.05 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001028/1.336, allocations: 1.386 MB / 0.7522 GB, free: 10.53 MB / 0.545 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 8.156e-06/1.336, allocations: 10.5 kB / 0.7522 GB, free: 10.52 MB / 0.545 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002723/1.338, allocations: 1.617 MB / 0.7538 GB, free: 8.863 MB / 0.545 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004086/1.339, allocations: 180.4 kB / 0.754 GB, free: 8.668 MB / 0.545 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002508/1.339, allocations: 19.92 kB / 0.754 GB, free: 8.648 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006973/1.34, allocations: 35.97 kB / 0.754 GB, free: 8.613 MB / 0.545 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001485/1.34, allocations: 67.09 kB / 0.7541 GB, free: 8.551 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001233/1.34, allocations: 67.97 kB / 0.7542 GB, free: 8.484 MB / 0.545 GB Notification: Performance of sorting global known variables: time 0.0009728/1.341, allocations: 0.6655 MB / 0.7548 GB, free: 7.809 MB / 0.545 GB Notification: Performance of sort global known variables: time 1.31e-07/1.341, allocations: 0 / 0.7548 GB, free: 7.809 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.003584/1.345, allocations: 1.075 MB / 0.7559 GB, free: 6.73 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 2 (junction.medium.p,junction.medium.T) * 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 (74): * Single equations (assignments): 73 * 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): 1 system {(1,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.003607/1.348, allocations: 0.9983 MB / 0.7568 GB, free: 5.797 MB / 0.545 GB Notification: Performance of simCode: created initialization part: time 0.00361/1.352, allocations: 1.642 MB / 0.7584 GB, free: 4.211 MB / 0.545 GB Notification: Performance of simCode: created event and clocks part: time 8.606e-06/1.352, allocations: 4 kB / 0.7584 GB, free: 4.207 MB / 0.545 GB Notification: Performance of simCode: created simulation system equations: time 0.001054/1.353, allocations: 0.5702 MB / 0.759 GB, free: 3.637 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003003/1.356, allocations: 0.5724 MB / 0.7596 GB, free: 3.066 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004237/1.36, allocations: 2.038 MB / 0.7616 GB, free: 0.9961 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008658/1.361, allocations: 1.082 MB / 0.7626 GB, free: 15.88 MB / 0.5606 GB Notification: Performance of simCode: alias equations: time 0.002133/1.363, allocations: 0.5892 MB / 0.7632 GB, free: 15.29 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005461/1.364, allocations: 163.3 kB / 0.7633 GB, free: 15.14 MB / 0.5606 GB Notification: Performance of SimCode: time 8.51e-07/1.364, allocations: 4 kB / 0.7633 GB, free: 15.14 MB / 0.5606 GB Notification: Performance of Templates: time 0.06563/1.429, allocations: 38.63 MB / 0.8011 GB, free: 8.57 MB / 0.5919 GB make -j1 -f ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.makefile (rm -f ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.pipe ; mkfifo ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.pipe ; head -c 1048576 < ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.pipe >> ../files/ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.sim & ./ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume -abortSlowSimulation -alarm=480 -lv LOG_STATS > ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Fittings.TestJunctionVolume.pipe 2>&1)