Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.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/ThermoPower 3.1.0-master/package.mo", uses=false) Using package ThermoPower with version 3.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/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(ThermoPower.Test.WaterComponents.TestSplitRev,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev") translateModel(ThermoPower.Test.WaterComponents.TestSplitRev,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001696/0.001696, allocations: 108.9 kB / 17.06 MB, free: 6.137 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002087/0.002087, allocations: 192 kB / 18 MB, free: 5.219 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.417/1.417, allocations: 205.1 MB / 223.9 MB, free: 12.25 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/package.mo): time 0.2686/0.2686, allocations: 48.86 MB / 320.1 MB, free: 11.02 MB / 270.1 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: Performance of FrontEnd - loaded program: time 0.001404/0.001404, allocations: 71.91 kB / 450.5 MB, free: 8.562 MB / 334.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1009/0.1023, allocations: 59.16 MB / 0.4978 GB, free: 13.27 MB / 398.1 MB Notification: Performance of NFInst.instantiate(ThermoPower.Test.WaterComponents.TestSplitRev): time 0.3217/0.424, allocations: 109.9 MB / 0.6051 GB, free: 9.621 MB / 462.1 MB Notification: Performance of NFInst.instExpressions: time 0.01461/0.4387, allocations: 11.7 MB / 0.6165 GB, free: 116 kB / 462.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008132/0.4396, allocations: 25.25 kB / 0.6165 GB, free: 104 kB / 462.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001568/0.4412, allocations: 0.5788 MB / 0.6171 GB, free: 15.59 MB / 478.1 MB Notification: Performance of NFTyping.typeBindings: time 0.001104/0.4423, allocations: 0.6736 MB / 0.6177 GB, free: 15.02 MB / 478.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.01493/0.4573, allocations: 5.721 MB / 0.6233 GB, free: 9.434 MB / 478.1 MB Notification: Performance of NFFlatten.flatten: time 0.002502/0.4598, allocations: 1.872 MB / 0.6252 GB, free: 7.555 MB / 478.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001016/0.4608, allocations: 0.6981 MB / 0.6258 GB, free: 6.844 MB / 478.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0009664/0.4618, allocations: 0.7161 MB / 0.6265 GB, free: 6.125 MB / 478.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0007634/0.4626, allocations: 0.7079 MB / 0.6272 GB, free: 5.414 MB / 478.1 MB Notification: Performance of NFPackage.collectConstants: time 0.000105/0.4627, allocations: 80 kB / 0.6273 GB, free: 5.336 MB / 478.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.01163/0.4743, allocations: 6.443 MB / 0.6336 GB, free: 14.89 MB / 494.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0002451/0.4746, allocations: 187.3 kB / 0.6338 GB, free: 14.7 MB / 494.1 MB Notification: Performance of NFVerifyModel.verify: time 0.000673/0.4753, allocations: 493.7 kB / 0.6342 GB, free: 14.22 MB / 494.1 MB Notification: Performance of NFConvertDAE.convert: time 0.009009/0.4843, allocations: 4.436 MB / 0.6386 GB, free: 9.773 MB / 494.1 MB Notification: Performance of FrontEnd - DAE generated: time 8.666e-06/0.4844, allocations: 3.984 kB / 0.6386 GB, free: 9.77 MB / 494.1 MB Notification: Performance of FrontEnd: time 1.814e-06/0.4844, allocations: 0 / 0.6386 GB, free: 9.77 MB / 494.1 MB Notification: Performance of Transformations before backend: time 5.043e-05/0.4844, allocations: 0 / 0.6386 GB, free: 9.77 MB / 494.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 174 * Number of variables: 174 Notification: Performance of Generate backend data structure: time 0.005345/0.4898, allocations: 1.855 MB / 0.6404 GB, free: 7.84 MB / 494.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.589e-05/0.4898, allocations: 11.89 kB / 0.6404 GB, free: 7.828 MB / 494.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004046/0.4902, allocations: 124.3 kB / 0.6405 GB, free: 7.707 MB / 494.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008048/0.4911, allocations: 0.5345 MB / 0.641 GB, free: 7.133 MB / 494.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.954e-05/0.4911, allocations: 58.36 kB / 0.6411 GB, free: 7.074 MB / 494.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001039/0.4912, allocations: 64.56 kB / 0.6412 GB, free: 7.012 MB / 494.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002438/0.4937, allocations: 0.9756 MB / 0.6421 GB, free: 5.98 MB / 494.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.107e-05/0.4937, allocations: 11.94 kB / 0.6421 GB, free: 5.969 MB / 494.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.818e-05/0.4938, allocations: 28 kB / 0.6422 GB, free: 5.941 MB / 494.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.854e-05/0.4938, allocations: 16.69 kB / 0.6422 GB, free: 5.926 MB / 494.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002595/0.4964, allocations: 0.7894 MB / 0.6429 GB, free: 5.137 MB / 494.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.005147/0.5016, allocations: 4.679 MB / 0.6475 GB, free: 4 kB / 494.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.002425/0.504, allocations: 0.7114 MB / 0.6482 GB, free: 15.27 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0009274/0.505, allocations: 294.3 kB / 0.6485 GB, free: 14.98 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0635/0.5685, allocations: 32.13 MB / 0.6799 GB, free: 11.03 MB / 0.5294 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001879/0.5704, allocations: 0.5118 MB / 0.6804 GB, free: 10.5 MB / 0.5294 GB Notification: Performance of pre-optimization done (n=42): time 4.308e-06/0.5704, allocations: 0 / 0.6804 GB, free: 10.5 MB / 0.5294 GB Notification: Performance of matching and sorting (n=42): time 0.003896/0.5743, allocations: 1.07 MB / 0.6814 GB, free: 9.422 MB / 0.5294 GB Notification: Performance of inlineWhenForInitialization (initialization): time 8.24e-05/0.5744, allocations: 89.11 kB / 0.6815 GB, free: 9.316 MB / 0.5294 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007419/0.5752, allocations: 0.5666 MB / 0.682 GB, free: 8.742 MB / 0.5294 GB Notification: Performance of collectPreVariables (initialization): time 5.804e-05/0.5753, allocations: 41.7 kB / 0.6821 GB, free: 8.695 MB / 0.5294 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002855/0.5756, allocations: 364.4 kB / 0.6824 GB, free: 8.332 MB / 0.5294 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001537/0.5757, allocations: 138 kB / 0.6826 GB, free: 8.195 MB / 0.5294 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001682/0.5759, allocations: 98.23 kB / 0.6827 GB, free: 8.094 MB / 0.5294 GB Notification: Performance of setup shared object (initialization): time 0.0001789/0.5761, allocations: 382.7 kB / 0.683 GB, free: 7.711 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009247/0.577, allocations: 266.8 kB / 0.6833 GB, free: 7.445 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009494/0.578, allocations: 363.7 kB / 0.6836 GB, free: 7.059 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0018/0.5798, allocations: 0.6805 MB / 0.6843 GB, free: 6.316 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.939e-06/0.5798, allocations: 4 kB / 0.6843 GB, free: 6.312 MB / 0.5294 GB Notification: Performance of matching and sorting (n=60) (initialization): time 0.002319/0.5821, allocations: 0.8394 MB / 0.6851 GB, free: 5.441 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 8.974e-05/0.5822, allocations: 123 kB / 0.6852 GB, free: 5.297 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.456e-05/0.5823, allocations: 11.98 kB / 0.6852 GB, free: 5.285 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.9e-05/0.5823, allocations: 4 kB / 0.6852 GB, free: 5.281 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006543/0.5829, allocations: 135.8 kB / 0.6854 GB, free: 5.148 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.253e-05/0.583, allocations: 7.938 kB / 0.6854 GB, free: 5.141 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006992/0.5837, allocations: 115.3 kB / 0.6855 GB, free: 5.027 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.278e-05/0.5837, allocations: 27.97 kB / 0.6855 GB, free: 5 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0009971/0.5847, allocations: 381 kB / 0.6859 GB, free: 4.621 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008859/0.5856, allocations: 345.4 kB / 0.6862 GB, free: 4.242 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001621/0.5873, allocations: 0.6515 MB / 0.6869 GB, free: 3.523 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.544e-06/0.5873, allocations: 0 / 0.6869 GB, free: 3.523 MB / 0.5294 GB Notification: Performance of matching and sorting (n=60) (initialization_lambda0): time 0.002008/0.5893, allocations: 0.8151 MB / 0.6876 GB, free: 2.676 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 5.792e-05/0.5894, allocations: 118.8 kB / 0.6878 GB, free: 2.535 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.317e-06/0.5894, allocations: 4 kB / 0.6878 GB, free: 2.531 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.354e-06/0.5894, allocations: 8 kB / 0.6878 GB, free: 2.523 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005488/0.5899, allocations: 132.2 kB / 0.6879 GB, free: 2.395 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.006e-05/0.59, allocations: 11.92 kB / 0.6879 GB, free: 2.383 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005873/0.5906, allocations: 103.4 kB / 0.688 GB, free: 2.281 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.373e-05/0.5906, allocations: 28 kB / 0.688 GB, free: 2.254 MB / 0.5294 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 12 * Number of states: 0 () * Number of discrete variables: 26 (Sine4.count,$PRE.Sine4.count,Sine4.T_start,$PRE.Sine4.T_start,Sine3.count,$PRE.Sine3.count,Sine3.T_start,$PRE.Sine3.T_start,$whenCondition3,$whenCondition4,Sine2.count,$PRE.Sine2.count,Sine2.T_start,$PRE.Sine2.T_start,Sine1.count,$PRE.Sine1.count,Sine1.T_start,$PRE.Sine1.T_start,$whenCondition1,$whenCondition2,T3.fluidState.phase,T2.fluidState.phase,T1.fluidState.phase,T6.fluidState.phase,T5.fluidState.phase,T4.fluidState.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (56): * Single equations (assignments): 52 * Array equations: 0 * Algorithm blocks: 4 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0002015/0.5908, allocations: 218.2 kB / 0.6882 GB, free: 2.035 MB / 0.5294 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001036/0.5909, allocations: 71.19 kB / 0.6883 GB, free: 1.965 MB / 0.5294 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00297/0.5939, allocations: 1.828 MB / 0.6901 GB, free: 124 kB / 0.5294 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.276e-05/0.5939, allocations: 23.95 kB / 0.6901 GB, free: 100 kB / 0.5294 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.242e-06/0.5939, allocations: 0 / 0.6901 GB, free: 100 kB / 0.5294 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.24e-06/0.594, allocations: 3.938 kB / 0.6901 GB, free: 96 kB / 0.5294 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002605/0.5966, allocations: 1.987 MB / 0.6921 GB, free: 14.05 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.332e-06/0.5966, allocations: 7.875 kB / 0.6921 GB, free: 14.04 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005366/0.5971, allocations: 111.8 kB / 0.6922 GB, free: 13.93 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.023e-06/0.5971, allocations: 4 kB / 0.6922 GB, free: 13.93 MB / 0.545 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.752e-05/0.5972, allocations: 16.03 kB / 0.6922 GB, free: 13.91 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.478e-06/0.5972, allocations: 0 / 0.6922 GB, free: 13.91 MB / 0.545 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.492e-06/0.5972, allocations: 3.938 kB / 0.6922 GB, free: 13.91 MB / 0.545 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002267/0.5995, allocations: 1.188 MB / 0.6934 GB, free: 12.7 MB / 0.545 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002366/0.5997, allocations: 219.5 kB / 0.6936 GB, free: 12.46 MB / 0.545 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 8.946e-05/0.5998, allocations: 12 kB / 0.6936 GB, free: 12.45 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006079/0.6004, allocations: 75.89 kB / 0.6937 GB, free: 12.38 MB / 0.545 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002038/0.6007, allocations: 79.89 kB / 0.6937 GB, free: 12.3 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.492e-05/0.6007, allocations: 16 kB / 0.6937 GB, free: 12.28 MB / 0.545 GB Notification: Performance of sorting global known variables: time 0.0004024/0.6011, allocations: 403.1 kB / 0.6941 GB, free: 11.89 MB / 0.545 GB Notification: Performance of sort global known variables: time 1.3e-07/0.6011, allocations: 0 / 0.6941 GB, free: 11.89 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.00252/0.6036, allocations: 1.12 MB / 0.6952 GB, free: 10.77 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 0 () * Number of discrete variables: 24 ($cse4.phase,$cse4.region,$cse5.phase,$cse5.region,$cse6.phase,$cse6.region,$whenCondition2,$whenCondition1,Sine1.T_start,Sine1.count,Sine2.T_start,Sine2.count,$cse1.phase,$cse1.region,$cse2.phase,$cse2.region,$cse3.phase,$cse3.region,$whenCondition4,$whenCondition3,Sine3.T_start,Sine3.count,Sine4.T_start,Sine4.count) * Number of discrete states: 4 (Sine3.count,Sine4.count,Sine2.count,Sine1.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (48): * Single equations (assignments): 34 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * When equations: 8 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.003056/0.6067, allocations: 0.9812 MB / 0.6962 GB, free: 9.785 MB / 0.545 GB Notification: Performance of simCode: created initialization part: time 0.00331/0.61, allocations: 1.538 MB / 0.6977 GB, free: 8.148 MB / 0.545 GB Notification: Performance of simCode: created event and clocks part: time 3.807e-06/0.61, allocations: 4 kB / 0.6977 GB, free: 8.145 MB / 0.545 GB Notification: Performance of simCode: created simulation system equations: time 0.0012/0.6113, allocations: 0.5672 MB / 0.6982 GB, free: 7.574 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001745/0.613, allocations: 364 kB / 0.6986 GB, free: 7.219 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002538/0.6156, allocations: 1.701 MB / 0.7002 GB, free: 5.48 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004919/0.6161, allocations: 1.011 MB / 0.7012 GB, free: 4.445 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.0006593/0.6167, allocations: 388.5 kB / 0.7016 GB, free: 4.062 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001963/0.6169, allocations: 59.42 kB / 0.7017 GB, free: 4.004 MB / 0.545 GB Notification: Performance of SimCode: time 7.62e-07/0.6169, allocations: 4 kB / 0.7017 GB, free: 4 MB / 0.545 GB Notification: Performance of Templates: time 0.05325/0.6702, allocations: 42.22 MB / 0.7429 GB, free: 9.711 MB / 0.5919 GB make -j1 -f ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.makefile (rm -f ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.pipe ; mkfifo ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.pipe ; head -c 1048576 < ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.pipe >> ../files/ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.sim & ./ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev -abortSlowSimulation -alarm=480 -lv LOG_STATS > ThermoPower_ThermoPower.Test.WaterComponents.TestSplitRev.pipe 2>&1)