Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.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/IDEAS 3.0.0-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-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: translateModel(IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector") translateModel(IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001096/0.001096, allocations: 103.4 kB / 15.33 MB, free: 0.5078 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001115/0.001115, allocations: 197.5 kB / 16.26 MB, free: 6.625 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.323/1.323, allocations: 222.9 MB / 239.9 MB, free: 4.508 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.9347/0.9347, allocations: 135.1 MB / 425.2 MB, free: 11.9 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001175/0.001175, allocations: 63.81 kB / 0.5049 GB, free: 5.621 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1323/0.1335, allocations: 80.93 MB / 0.5839 GB, free: 4.859 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector): time 0.2878/0.4214, allocations: 41.6 MB / 0.6245 GB, free: 31.05 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.009036/0.4304, allocations: 8.801 MB / 0.6331 GB, free: 24.82 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001035/0.4315, allocations: 34.38 kB / 0.6332 GB, free: 24.81 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.00117/0.4327, allocations: 0.5032 MB / 0.6336 GB, free: 24.52 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.00216/0.4349, allocations: 1.177 MB / 0.6348 GB, free: 23.82 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.002093/0.437, allocations: 1.081 MB / 0.6358 GB, free: 23.23 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.001967/0.439, allocations: 2.704 MB / 0.6385 GB, free: 21.88 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0008582/0.4398, allocations: 0.9229 MB / 0.6394 GB, free: 21.42 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00158/0.4414, allocations: 1.048 MB / 0.6404 GB, free: 20.89 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.000598/0.442, allocations: 0.7661 MB / 0.6412 GB, free: 20.52 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0001208/0.4422, allocations: 120.5 kB / 0.6413 GB, free: 20.52 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001522/0.4437, allocations: 1.196 MB / 0.6424 GB, free: 20.12 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.0002134/0.4439, allocations: 327.2 kB / 0.6428 GB, free: 19.94 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.0004121/0.4443, allocations: 0.6381 MB / 0.6434 GB, free: 19.52 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.001849/0.4462, allocations: 2.337 MB / 0.6457 GB, free: 18.69 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 4.028e-06/0.4462, allocations: 0 / 0.6457 GB, free: 18.69 MB / 0.4981 GB Notification: Performance of FrontEnd: time 2.124e-06/0.4462, allocations: 0 / 0.6457 GB, free: 18.69 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 1.473e-05/0.4462, allocations: 0 / 0.6457 GB, free: 18.69 MB / 0.4981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 157 * Number of variables: 157 Notification: Performance of Generate backend data structure: time 0.001973/0.4482, allocations: 1.734 MB / 0.6474 GB, free: 17.39 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 3.341e-05/0.4483, allocations: 12.55 kB / 0.6474 GB, free: 17.39 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002639/0.4485, allocations: 129.4 kB / 0.6475 GB, free: 17.33 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001279/0.4498, allocations: 1.07 MB / 0.6485 GB, free: 16.64 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.403e-05/0.4499, allocations: 52.34 kB / 0.6486 GB, free: 16.61 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 9.456e-05/0.45, allocations: 67.25 kB / 0.6487 GB, free: 16.59 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0011/0.4511, allocations: 0.8037 MB / 0.6494 GB, free: 16.24 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.059e-05/0.4511, allocations: 2.625 kB / 0.6494 GB, free: 16.24 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.01e-05/0.4512, allocations: 25.25 kB / 0.6495 GB, free: 16.22 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.175e-05/0.4512, allocations: 15.94 kB / 0.6495 GB, free: 16.22 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000939/0.4521, allocations: 0.6151 MB / 0.6501 GB, free: 15.99 MB / 0.4981 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 0.003039/0.4552, allocations: 3.208 MB / 0.6532 GB, free: 13.83 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007811/0.456, allocations: 461.7 kB / 0.6537 GB, free: 13.65 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004478/0.4564, allocations: 308.1 kB / 0.6539 GB, free: 13.54 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0006499/0.4571, allocations: 0.7726 MB / 0.6547 GB, free: 12.68 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.459e-05/0.4571, allocations: 42.56 kB / 0.6547 GB, free: 12.64 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=38): time 2.294e-06/0.4571, allocations: 0 / 0.6547 GB, free: 12.64 MB / 0.4981 GB Notification: Performance of matching and sorting (n=38): time 0.001569/0.4587, allocations: 0.993 MB / 0.6557 GB, free: 12.19 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.874e-05/0.4588, allocations: 143.2 kB / 0.6558 GB, free: 12.03 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001268/0.46, allocations: 1.075 MB / 0.6569 GB, free: 11.58 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 4.47e-05/0.4601, allocations: 38.73 kB / 0.6569 GB, free: 11.54 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002847/0.4604, allocations: 469.8 kB / 0.6574 GB, free: 11.17 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 8.965e-05/0.4605, allocations: 128.7 kB / 0.6575 GB, free: 11.07 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001783/0.4607, allocations: 114.8 kB / 0.6576 GB, free: 11.02 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 5.424e-05/0.4607, allocations: 329.8 kB / 0.6579 GB, free: 10.7 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005179/0.4613, allocations: 351.7 kB / 0.6583 GB, free: 10.57 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005641/0.4618, allocations: 455.1 kB / 0.6587 GB, free: 10.35 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001063/0.4629, allocations: 0.9729 MB / 0.6596 GB, free: 9.719 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.758e-06/0.4629, allocations: 1.031 kB / 0.6596 GB, free: 9.719 MB / 0.4981 GB Notification: Performance of matching and sorting (n=62) (initialization): time 0.001511/0.4644, allocations: 1.103 MB / 0.6607 GB, free: 9.16 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 7.593e-05/0.4645, allocations: 185.5 kB / 0.6609 GB, free: 8.965 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.554e-06/0.4645, allocations: 1.797 kB / 0.6609 GB, free: 8.965 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.748e-05/0.4646, allocations: 4.406 kB / 0.6609 GB, free: 8.965 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003607/0.4649, allocations: 89.45 kB / 0.661 GB, free: 8.957 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.085e-05/0.4649, allocations: 4.953 kB / 0.661 GB, free: 8.957 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006252/0.4656, allocations: 106.6 kB / 0.6611 GB, free: 8.91 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.164e-05/0.4657, allocations: 28.45 kB / 0.6611 GB, free: 8.902 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007843/0.4664, allocations: 0.5948 MB / 0.6617 GB, free: 8.605 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005619/0.467, allocations: 447 kB / 0.6621 GB, free: 8.383 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001026/0.468, allocations: 0.9679 MB / 0.6631 GB, free: 7.758 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.206e-06/0.4681, allocations: 9.188 kB / 0.6631 GB, free: 7.75 MB / 0.4981 GB Notification: Performance of matching and sorting (n=62) (initialization_lambda0): time 0.001411/0.4695, allocations: 1.101 MB / 0.6642 GB, free: 7.184 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 6.57e-05/0.4696, allocations: 186.5 kB / 0.6643 GB, free: 6.988 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.085e-06/0.4696, allocations: 1.125 kB / 0.6643 GB, free: 6.988 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.821e-06/0.4696, allocations: 4.281 kB / 0.6643 GB, free: 6.988 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003443/0.4699, allocations: 88.44 kB / 0.6644 GB, free: 6.98 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 8.105e-06/0.4699, allocations: 5.375 kB / 0.6644 GB, free: 6.98 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006062/0.4706, allocations: 81.08 kB / 0.6645 GB, free: 6.953 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.41e-05/0.4706, allocations: 23.91 kB / 0.6645 GB, free: 6.949 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 (con.mod.airFlo_mod.i,con.mod.watFlo_mod.i,con.mod.temDif_mod.i) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (53): * Single equations (assignments): 47 * Array equations: 0 * Algorithm blocks: 6 * 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 0.0001834/0.4708, allocations: 303.6 kB / 0.6648 GB, free: 6.648 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001569/0.471, allocations: 102.9 kB / 0.6649 GB, free: 6.594 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001513/0.4725, allocations: 0.9084 MB / 0.6658 GB, free: 6.164 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.29e-05/0.4725, allocations: 13.59 kB / 0.6658 GB, free: 6.156 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.641e-06/0.4725, allocations: 0.6094 kB / 0.6658 GB, free: 6.156 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001093/0.4736, allocations: 0.977 MB / 0.6668 GB, free: 5.496 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002952/0.4766, allocations: 2.111 MB / 0.6688 GB, free: 4.285 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.979e-06/0.4766, allocations: 2.406 kB / 0.6688 GB, free: 4.285 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002926/0.4769, allocations: 61.84 kB / 0.6689 GB, free: 4.281 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.865e-06/0.4769, allocations: 8.812 kB / 0.6689 GB, free: 4.277 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.118e-05/0.477, allocations: 19.92 kB / 0.6689 GB, free: 4.27 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.763e-06/0.477, allocations: 7.844 kB / 0.6689 GB, free: 4.266 MB / 0.4981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.048e-06/0.477, allocations: 2.578 kB / 0.6689 GB, free: 4.266 MB / 0.4981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001742/0.4787, allocations: 1.395 MB / 0.6703 GB, free: 3.516 MB / 0.4981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003362/0.4791, allocations: 281.7 kB / 0.6706 GB, free: 3.297 MB / 0.4981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001326/0.4792, allocations: 13.67 kB / 0.6706 GB, free: 3.293 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005538/0.4798, allocations: 56.64 kB / 0.6706 GB, free: 3.277 MB / 0.4981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001315/0.4799, allocations: 50.81 kB / 0.6707 GB, free: 3.262 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.961e-05/0.48, allocations: 20.98 kB / 0.6707 GB, free: 3.258 MB / 0.4981 GB Notification: Performance of sorting global known variables: time 0.0009773/0.481, allocations: 0.7721 MB / 0.6715 GB, free: 2.922 MB / 0.4981 GB Notification: Performance of sort global known variables: time 2.71e-07/0.481, allocations: 4 kB / 0.6715 GB, free: 2.918 MB / 0.4981 GB Notification: Performance of remove unused functions: time 0.001348/0.4823, allocations: 0.513 MB / 0.672 GB, free: 2.828 MB / 0.4981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 10 * Number of states: 2 (con.hex.vol.dynBal.U,senTem.T) * Number of discrete variables: 3 (con.mod.temDif_mod.i,con.mod.watFlo_mod.i,con.mod.airFlo_mod.i) * Number of discrete states: 3 (con.mod.airFlo_mod.i,con.mod.watFlo_mod.i,con.mod.temDif_mod.i) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (38): * Single equations (assignments): 31 * Array equations: 0 * Algorithm blocks: 3 * Record equations: 4 * When equations: 0 * 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 0.000777/0.4831, allocations: 393.5 kB / 0.6723 GB, free: 2.645 MB / 0.4981 GB Notification: Performance of simCode: created initialization part: time 0.002168/0.4853, allocations: 1.97 MB / 0.6743 GB, free: 1.406 MB / 0.4981 GB Notification: Performance of simCode: created event and clocks part: time 3.045e-06/0.4853, allocations: 1.562 kB / 0.6743 GB, free: 1.406 MB / 0.4981 GB Notification: Performance of simCode: created simulation system equations: time 0.0006222/0.4859, allocations: 0.545 MB / 0.6748 GB, free: 1.078 MB / 0.4981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002213/0.4882, allocations: 0.5476 MB / 0.6753 GB, free: 0.9258 MB / 0.4981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002609/0.4908, allocations: 2.224 MB / 0.6775 GB, free: 15.53 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006837/0.4915, allocations: 1.075 MB / 0.6786 GB, free: 14.77 MB / 0.5137 GB Notification: Performance of simCode: alias equations: time 0.0007264/0.4922, allocations: 202.5 kB / 0.6787 GB, free: 14.74 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001711/0.4924, allocations: 78.83 kB / 0.6788 GB, free: 14.73 MB / 0.5137 GB Notification: Performance of SimCode: time 3.71e-07/0.4924, allocations: 0 / 0.6788 GB, free: 14.73 MB / 0.5137 GB Notification: Performance of Templates: time 0.03703/0.5294, allocations: 23.97 MB / 0.7022 GB, free: 3.234 MB / 0.5137 GB make -j1 -f IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.makefile (rm -f IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.sim & ./IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe 2>&1)