Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.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: translateModel(IBPSA.Fluid.Movers.Validation.PowerExact,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact") translateModel(IBPSA.Fluid.Movers.Validation.PowerExact,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00128/0.00128, allocations: 111.3 kB / 17.04 MB, free: 6.078 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001237/0.001237, allocations: 195 kB / 17.98 MB, free: 5.16 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.258/1.258, allocations: 222.9 MB / 241.7 MB, free: 15.16 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.6898/0.6898, allocations: 115.1 MB / 406.9 MB, free: 6.359 MB / 318.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001223/0.001223, allocations: 63.89 kB / 494.8 MB, free: 15.91 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3374/0.3386, allocations: 76.14 MB / 0.5576 GB, free: 36.72 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Movers.Validation.PowerExact): time 0.06571/0.4044, allocations: 75.94 MB / 0.6317 GB, free: 8.449 MB / 478.1 MB Notification: Performance of NFInst.instExpressions: time 0.03724/0.4417, allocations: 26.05 MB / 0.6572 GB, free: 14.33 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004799/0.4465, allocations: 115.4 kB / 0.6573 GB, free: 14.21 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.01725/0.4638, allocations: 10.36 MB / 0.6674 GB, free: 3.84 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.0115/0.4753, allocations: 4.225 MB / 0.6715 GB, free: 15.6 MB / 0.5137 GB Notification: Performance of NFTyping.typeClassSections: time 0.00775/0.4831, allocations: 3.205 MB / 0.6747 GB, free: 12.41 MB / 0.5137 GB Notification: Performance of NFFlatten.flatten: time 0.0328/0.5159, allocations: 23.55 MB / 0.6977 GB, free: 4.832 MB / 0.5294 GB Notification: Performance of NFFlatten.resolveConnections: time 0.005165/0.5211, allocations: 3.181 MB / 0.7008 GB, free: 1.59 MB / 0.5294 GB Notification: Performance of NFEvalConstants.evaluate: time 0.007711/0.5288, allocations: 3.603 MB / 0.7043 GB, free: 13.98 MB / 0.545 GB Notification: Performance of NFSimplifyModel.simplify: time 0.005004/0.5338, allocations: 3.079 MB / 0.7073 GB, free: 10.89 MB / 0.545 GB Notification: Performance of NFPackage.collectConstants: time 0.001388/0.5352, allocations: 456 kB / 0.7077 GB, free: 10.44 MB / 0.545 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005885/0.5411, allocations: 2.706 MB / 0.7104 GB, free: 7.734 MB / 0.545 GB Notification: Performance of NFScalarize.scalarize: time 0.002188/0.5434, allocations: 2.115 MB / 0.7124 GB, free: 5.613 MB / 0.545 GB Notification: Performance of NFVerifyModel.verify: time 0.004515/0.5479, allocations: 3.052 MB / 0.7154 GB, free: 2.547 MB / 0.545 GB Notification: Performance of NFConvertDAE.convert: time 0.01225/0.5602, allocations: 9.281 MB / 0.7245 GB, free: 9.238 MB / 0.5606 GB Notification: Performance of FrontEnd - DAE generated: time 8.145e-06/0.5602, allocations: 4 kB / 0.7245 GB, free: 9.234 MB / 0.5606 GB Notification: Performance of FrontEnd: time 1.654e-06/0.5602, allocations: 0 / 0.7245 GB, free: 9.234 MB / 0.5606 GB Notification: Performance of Transformations before backend: time 0.0001784/0.5604, allocations: 0 / 0.7245 GB, free: 9.234 MB / 0.5606 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 450 * Number of variables: 450 Notification: Performance of Generate backend data structure: time 0.01627/0.5767, allocations: 7.24 MB / 0.7316 GB, free: 1.891 MB / 0.5606 GB Notification: Performance of prepare preOptimizeDAE: time 4.172e-05/0.5767, allocations: 15.91 kB / 0.7316 GB, free: 1.875 MB / 0.5606 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.009453/0.5862, allocations: 1.574 MB / 0.7331 GB, free: 300 kB / 0.5606 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.01716/0.6034, allocations: 9.303 MB / 0.7422 GB, free: 6.922 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002851/0.6037, allocations: 235.9 kB / 0.7424 GB, free: 6.68 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0006607/0.6044, allocations: 211.8 kB / 0.7426 GB, free: 6.473 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.005638/0.61, allocations: 3.252 MB / 0.7458 GB, free: 3.137 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.874e-05/0.6101, allocations: 0 / 0.7458 GB, free: 3.137 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002052/0.6103, allocations: 76 kB / 0.7459 GB, free: 3.062 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.941e-05/0.6104, allocations: 48 kB / 0.7459 GB, free: 3.016 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005372/0.6157, allocations: 2.488 MB / 0.7483 GB, free: 0.5234 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 0.272/0.8878, allocations: 13.53 MB / 0.7616 GB, free: 155 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.005763/0.8936, allocations: 1.967 MB / 0.7635 GB, free: 154.4 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.002279/0.8959, allocations: 1.063 MB / 0.7645 GB, free: 154.1 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 evalFunc (simulation): time 0.01025/0.9062, allocations: 5.598 MB / 0.77 GB, free: 150.8 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.089e-05/0.9062, allocations: 52.06 kB / 0.77 GB, free: 150.7 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=89): time 2.906e-06/0.9062, allocations: 0 / 0.77 GB, free: 150.7 MB / 0.5762 GB Notification: Performance of matching and sorting (n=97): time 0.02966/0.9359, allocations: 8.107 MB / 0.7779 GB, free: 147.8 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.886e-05/0.936, allocations: 62.72 kB / 0.778 GB, free: 147.8 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01367/0.9496, allocations: 7.362 MB / 0.7852 GB, free: 144.4 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.0004187/0.9501, allocations: 61.23 kB / 0.7853 GB, free: 144.3 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.002099/0.9522, allocations: 2.216 MB / 0.7874 GB, free: 142.4 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0006216/0.9528, allocations: 361.1 kB / 0.7878 GB, free: 142.1 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001486/0.9543, allocations: 0.7593 MB / 0.7885 GB, free: 141.7 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 4.434e-05/0.9544, allocations: 309.9 kB / 0.7888 GB, free: 141.4 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00333/0.9577, allocations: 2.773 MB / 0.7915 GB, free: 140.1 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003822/0.9616, allocations: 3.718 MB / 0.7951 GB, free: 137.6 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.007015/0.9686, allocations: 6.086 MB / 0.8011 GB, free: 133.3 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.28e-05/0.9686, allocations: 8 kB / 0.8011 GB, free: 133.3 MB / 0.5762 GB Notification: Performance of matching and sorting (n=427) (initialization): time 0.01556/0.9842, allocations: 8.04 MB / 0.8089 GB, free: 125.3 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 3.215e-05/0.9843, allocations: 15.75 kB / 0.809 GB, free: 125.3 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.171e-05/0.9843, allocations: 24 kB / 0.809 GB, free: 125.2 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002026/0.9864, allocations: 1.573 MB / 0.8105 GB, free: 123.7 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00291/0.9893, allocations: 0.6277 MB / 0.8111 GB, free: 123.1 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0077/0.997, allocations: 10.28 MB / 0.8212 GB, free: 112.2 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004105/1.001, allocations: 215 kB / 0.8214 GB, free: 112.1 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003853/1.002, allocations: 171.9 kB / 0.8215 GB, free: 111.9 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.004671/1.006, allocations: 3.504 MB / 0.825 GB, free: 108.4 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.00329/1.01, allocations: 3.247 MB / 0.8281 GB, free: 104.8 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.005557/1.015, allocations: 5.161 MB / 0.8332 GB, free: 99.28 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.132e-05/1.015, allocations: 10.11 kB / 0.8332 GB, free: 99.27 MB / 0.5762 GB Notification: Performance of matching and sorting (n=427) (initialization_lambda0): time 0.01418/1.029, allocations: 6.958 MB / 0.84 GB, free: 92.25 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.783e-05/1.029, allocations: 13.53 kB / 0.84 GB, free: 92.23 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.074e-05/1.029, allocations: 24 kB / 0.84 GB, free: 92.21 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002024/1.031, allocations: 1.226 MB / 0.8412 GB, free: 90.97 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002271/1.034, allocations: 0.5964 MB / 0.8418 GB, free: 90.38 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0119/1.046, allocations: 12.82 MB / 0.8543 GB, free: 76.91 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004641/1.05, allocations: 224.6 kB / 0.8545 GB, free: 76.69 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005048/1.051, allocations: 160 kB / 0.8547 GB, free: 76.53 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 (292): * Single equations (assignments): 277 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 3 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 3 * Torn equation systems: 6 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 3 systems {1, 1, 1} * Without analytic Jacobian (size): 0 systems 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): 6 systems {(1,2), (1,2), (1,1), (1,2), (1,1), (1,4)} Notification: Performance of prepare postOptimizeDAE: time 0.0009634/1.052, allocations: 343.2 kB / 0.855 GB, free: 76.19 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001708/1.054, allocations: 477.6 kB / 0.8555 GB, free: 75.71 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01137/1.065, allocations: 3.691 MB / 0.8591 GB, free: 72.01 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.022e-05/1.065, allocations: 12 kB / 0.8591 GB, free: 72 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.29e-06/1.065, allocations: 0 / 0.8591 GB, free: 72 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.009149/1.074, allocations: 3.246 MB / 0.8622 GB, free: 68.66 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01812/1.092, allocations: 7.067 MB / 0.8692 GB, free: 61.53 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.756e-06/1.092, allocations: 0 / 0.8692 GB, free: 61.53 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001629/1.094, allocations: 359.7 kB / 0.8695 GB, free: 61.18 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001349/1.095, allocations: 0.8748 MB / 0.8703 GB, free: 60.3 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001639/1.095, allocations: 51.89 kB / 0.8704 GB, free: 60.25 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003962/1.099, allocations: 5.093 MB / 0.8754 GB, free: 55 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.727e-06/1.099, allocations: 0 / 0.8754 GB, free: 55 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01286/1.112, allocations: 5.006 MB / 0.8803 GB, free: 49.96 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002856/1.115, allocations: 0.8616 MB / 0.8811 GB, free: 49.07 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001404/1.117, allocations: 32 kB / 0.8811 GB, free: 49.04 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003075/1.12, allocations: 147.8 kB / 0.8813 GB, free: 48.9 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001677/1.12, allocations: 84.83 kB / 0.8814 GB, free: 48.82 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001561/1.12, allocations: 67.94 kB / 0.8814 GB, free: 48.75 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.006697/1.127, allocations: 5.147 MB / 0.8864 GB, free: 43.61 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.91e-07/1.127, allocations: 0 / 0.8864 GB, free: 43.61 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.006093/1.133, allocations: 2.03 MB / 0.8884 GB, free: 41.64 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 3 (pump_y.vol.dynBal.U,pump_dp.vol.dynBal.U,pump_m_flow.vol.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 (110): * Single equations (assignments): 96 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 8 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 3 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 3 systems {1, 1, 1} * Without analytic Jacobian (size): 0 systems 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): 3 systems {(1,1), (1,1), (1,5)} Notification: Performance of Backend phase and start with SimCode phase: time 0.00185/1.135, allocations: 0.8843 MB / 0.8893 GB, free: 40.86 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.01384/1.149, allocations: 8.433 MB / 0.8975 GB, free: 32.34 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 6.532e-06/1.149, allocations: 4 kB / 0.8975 GB, free: 32.34 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.003001/1.152, allocations: 1.302 MB / 0.8988 GB, free: 31.04 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01041/1.162, allocations: 2.806 MB / 0.9015 GB, free: 28.35 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02082/1.183, allocations: 8.788 MB / 0.9101 GB, free: 19.54 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00316/1.186, allocations: 2.95 MB / 0.913 GB, free: 16.56 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.00752/1.194, allocations: 1.341 MB / 0.9143 GB, free: 15.21 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001733/1.195, allocations: 383.2 kB / 0.9147 GB, free: 14.84 MB / 0.5762 GB Notification: Performance of SimCode: time 1.323e-06/1.195, allocations: 0 / 0.9147 GB, free: 14.84 MB / 0.5762 GB Notification: Performance of Templates: time 0.385/1.58, allocations: 120.4 MB / 1.032 GB, free: 198.6 MB / 0.6387 GB make -j1 -f IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.makefile (rm -f IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.sim & ./IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact -abortSlowSimulation -alarm=480 -s cvode -lv LOG_STATS > IBPSA_latest_IBPSA.Fluid.Movers.Validation.PowerExact.pipe 2>&1)