Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.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/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-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(BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface") translateModel(BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001323/0.001323, allocations: 115.3 kB / 15.34 MB, free: 0.5156 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001523/0.001523, allocations: 191.8 kB / 16.25 MB, free: 6.629 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.298/1.298, allocations: 222.9 MB / 239.9 MB, free: 4.578 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002159/0.002159, allocations: 279 kB / 290.4 MB, free: 2.184 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.9412/0.9412, allocations: 169.2 MB / 0.4978 GB, free: 14.1 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001593/0.001593, allocations: 95.61 kB / 0.5947 GB, free: 28.18 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1519/0.1535, allocations: 86.99 MB / 0.6796 GB, free: 1.09 MB / 478.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface): time 0.003615/0.1572, allocations: 2.338 MB / 0.6819 GB, free: 14.75 MB / 494.1 MB Notification: Performance of NFInst.instExpressions: time 0.005567/0.1628, allocations: 3.773 MB / 0.6856 GB, free: 10.96 MB / 494.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002356/0.163, allocations: 4 kB / 0.6856 GB, free: 10.96 MB / 494.1 MB Notification: Performance of NFTyping.typeComponents: time 0.005175/0.1683, allocations: 3.066 MB / 0.6886 GB, free: 7.891 MB / 494.1 MB Notification: Performance of NFTyping.typeBindings: time 0.000773/0.169, allocations: 366.8 kB / 0.6889 GB, free: 7.531 MB / 494.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.001125/0.1702, allocations: 478.1 kB / 0.6894 GB, free: 7.066 MB / 494.1 MB [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/NFFrontEnd/NFCeval.mo:1089:9-1089:67:writable] Error: Internal error NFCeval.evalBinaryMul failed to evaluate ‘{0.0, 1.0}[pressure.n] * 0.0‘ Notification: Performance of NFFlatten.flatten: time 0.004013/0.1742, allocations: 3.288 MB / 0.6926 GB, free: 3.773 MB / 494.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0001168/0.1743, allocations: 48.72 kB / 0.6927 GB, free: 3.727 MB / 494.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.000246/0.1746, allocations: 207.3 kB / 0.6929 GB, free: 3.523 MB / 494.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0002737/0.1749, allocations: 235.1 kB / 0.6931 GB, free: 3.293 MB / 494.1 MB Notification: Performance of NFPackage.collectConstants: time 3.354e-05/0.1749, allocations: 16 kB / 0.6931 GB, free: 3.277 MB / 494.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.001072/0.176, allocations: 0.7525 MB / 0.6938 GB, free: 2.523 MB / 494.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001829/0.1762, allocations: 207.4 kB / 0.694 GB, free: 2.32 MB / 494.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0001949/0.1764, allocations: 242.5 kB / 0.6943 GB, free: 2.082 MB / 494.1 MB Notification: Performance of NFConvertDAE.convert: time 0.00112/0.1775, allocations: 1.024 MB / 0.6953 GB, free: 1.055 MB / 494.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.897e-06/0.1775, allocations: 4 kB / 0.6953 GB, free: 1.051 MB / 494.1 MB Notification: Performance of FrontEnd: time 1.462e-06/0.1775, allocations: 0 / 0.6953 GB, free: 1.051 MB / 494.1 MB Notification: Performance of Transformations before backend: time 7.834e-06/0.1776, allocations: 0 / 0.6953 GB, free: 1.051 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: 21 * Number of variables: 21 Notification: Performance of Generate backend data structure: time 0.00127/0.1788, allocations: 0.8867 MB / 0.6961 GB, free: 116 kB / 494.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.945e-05/0.1789, allocations: 8.031 kB / 0.6961 GB, free: 108 kB / 494.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001249/0.1801, allocations: 212 kB / 0.6963 GB, free: 15.9 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001737/0.1819, allocations: 0.9521 MB / 0.6973 GB, free: 14.91 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.389e-05/0.1819, allocations: 8 kB / 0.6973 GB, free: 14.9 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 3.346e-05/0.182, allocations: 12 kB / 0.6973 GB, free: 14.89 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005598/0.1825, allocations: 267.6 kB / 0.6975 GB, free: 14.62 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 8.937e-06/0.1826, allocations: 0 / 0.6975 GB, free: 14.62 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.239e-05/0.1826, allocations: 0 / 0.6975 GB, free: 14.62 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.222e-06/0.1826, allocations: 4 kB / 0.6975 GB, free: 14.62 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006457/0.1833, allocations: 243.8 kB / 0.6978 GB, free: 14.38 MB / 0.4981 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0012/0.1845, allocations: 0.8355 MB / 0.6986 GB, free: 13.49 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006881/0.1852, allocations: 302.6 kB / 0.6989 GB, free: 13.19 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003193/0.1855, allocations: 132.7 kB / 0.699 GB, free: 13.05 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 2.882e-05/0.1855, allocations: 0 / 0.699 GB, free: 13.05 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.591e-05/0.1856, allocations: 38.5 kB / 0.699 GB, free: 13.01 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=10): time 1.042e-06/0.1856, allocations: 0 / 0.699 GB, free: 13.01 MB / 0.4981 GB Notification: Performance of matching and sorting (n=10): time 0.001156/0.1867, allocations: 448.6 kB / 0.6995 GB, free: 12.56 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.467e-05/0.1868, allocations: 55.41 kB / 0.6995 GB, free: 12.5 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006922/0.1875, allocations: 0.7381 MB / 0.7003 GB, free: 11.75 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 3.056e-05/0.1875, allocations: 29.7 kB / 0.7003 GB, free: 11.71 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001603/0.1877, allocations: 228.7 kB / 0.7005 GB, free: 11.48 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 4.246e-05/0.1877, allocations: 39.55 kB / 0.7005 GB, free: 11.44 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001859/0.1879, allocations: 154 kB / 0.7007 GB, free: 11.29 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 0.000135/0.1881, allocations: 370.8 kB / 0.701 GB, free: 10.91 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006304/0.1887, allocations: 446.9 kB / 0.7015 GB, free: 10.47 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007283/0.1894, allocations: 0.5239 MB / 0.702 GB, free: 9.922 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001285/0.1907, allocations: 0.8702 MB / 0.7028 GB, free: 9.031 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.941e-06/0.1907, allocations: 4 kB / 0.7028 GB, free: 9.027 MB / 0.4981 GB Notification: Performance of matching and sorting (n=85) (initialization): time 0.001632/0.1924, allocations: 1.08 MB / 0.7039 GB, free: 7.938 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 2.004e-05/0.1924, allocations: 7.984 kB / 0.7039 GB, free: 7.93 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.488e-06/0.1924, allocations: 3.984 kB / 0.7039 GB, free: 7.926 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.728e-05/0.1924, allocations: 4 kB / 0.7039 GB, free: 7.922 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004657/0.1929, allocations: 111.9 kB / 0.704 GB, free: 7.812 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.27e-05/0.1929, allocations: 7.938 kB / 0.704 GB, free: 7.805 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004154/0.1934, allocations: 71.34 kB / 0.7041 GB, free: 7.734 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.711e-05/0.1934, allocations: 31.98 kB / 0.7041 GB, free: 7.703 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007711/0.1942, allocations: 0.5449 MB / 0.7046 GB, free: 7.152 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0006509/0.1949, allocations: 464.5 kB / 0.7051 GB, free: 6.668 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001115/0.196, allocations: 0.7315 MB / 0.7058 GB, free: 5.918 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.248e-06/0.196, allocations: 0 / 0.7058 GB, free: 5.918 MB / 0.4981 GB Notification: Performance of matching and sorting (n=85) (initialization_lambda0): time 0.001419/0.1974, allocations: 0.9261 MB / 0.7067 GB, free: 4.984 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 1.258e-05/0.1975, allocations: 5.406 kB / 0.7067 GB, free: 4.98 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.831e-06/0.1975, allocations: 4.375 kB / 0.7067 GB, free: 4.977 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.72e-06/0.1975, allocations: 4 kB / 0.7067 GB, free: 4.973 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004214/0.1979, allocations: 115.9 kB / 0.7068 GB, free: 4.859 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 8.035e-06/0.1979, allocations: 4 kB / 0.7068 GB, free: 4.855 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004181/0.1983, allocations: 55.59 kB / 0.7069 GB, free: 4.801 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.706e-05/0.1984, allocations: 27.98 kB / 0.7069 GB, free: 4.773 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: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (52): * Single equations (assignments): 50 * Array equations: 1 * Algorithm blocks: 0 * Record equations: 1 * 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 0.0001704/0.1986, allocations: 208.7 kB / 0.7071 GB, free: 4.562 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 7.782e-05/0.1987, allocations: 51.25 kB / 0.7072 GB, free: 4.512 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0009601/0.1996, allocations: 358.6 kB / 0.7075 GB, free: 4.148 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.779e-06/0.1996, allocations: 4 kB / 0.7075 GB, free: 4.145 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.372e-06/0.1997, allocations: 0 / 0.7075 GB, free: 4.145 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.837e-06/0.1997, allocations: 4 kB / 0.7075 GB, free: 4.141 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0004664/0.2001, allocations: 413.1 kB / 0.7079 GB, free: 3.688 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.833e-06/0.2001, allocations: 0 / 0.7079 GB, free: 3.688 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002576/0.2004, allocations: 43.89 kB / 0.7079 GB, free: 3.645 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 3.126e-06/0.2004, allocations: 0 / 0.7079 GB, free: 3.645 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.057e-05/0.2004, allocations: 8 kB / 0.708 GB, free: 3.637 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.583e-06/0.2005, allocations: 0 / 0.708 GB, free: 3.637 MB / 0.4981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.065e-06/0.2005, allocations: 7.984 kB / 0.708 GB, free: 3.629 MB / 0.4981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0007533/0.2012, allocations: 414.7 kB / 0.7084 GB, free: 3.207 MB / 0.4981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001619/0.2014, allocations: 144.3 kB / 0.7085 GB, free: 3.047 MB / 0.4981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.922e-05/0.2015, allocations: 11.98 kB / 0.7085 GB, free: 3.035 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002854/0.2018, allocations: 19.98 kB / 0.7085 GB, free: 3.016 MB / 0.4981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 4.072e-05/0.2018, allocations: 7.984 kB / 0.7085 GB, free: 3.008 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.129e-05/0.2018, allocations: 12 kB / 0.7085 GB, free: 2.996 MB / 0.4981 GB Notification: Performance of sorting global known variables: time 0.0005446/0.2024, allocations: 0.4912 MB / 0.709 GB, free: 2.508 MB / 0.4981 GB Notification: Performance of sort global known variables: time 1.1e-07/0.2024, allocations: 0 / 0.709 GB, free: 2.508 MB / 0.4981 GB Notification: Performance of remove unused functions: time 0.0008767/0.2033, allocations: 311.9 kB / 0.7093 GB, free: 2.203 MB / 0.4981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * 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 simulation (11): * Single equations (assignments): 11 * Array equations: 0 * Algorithm blocks: 0 * 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 Backend phase and start with SimCode phase: time 0.000813/0.2041, allocations: 382.7 kB / 0.7097 GB, free: 1.816 MB / 0.4981 GB Notification: Performance of simCode: created initialization part: time 0.001941/0.206, allocations: 1.151 MB / 0.7108 GB, free: 0.668 MB / 0.4981 GB Notification: Performance of simCode: created event and clocks part: time 2.695e-06/0.2061, allocations: 0 / 0.7108 GB, free: 0.668 MB / 0.4981 GB Notification: Performance of simCode: created simulation system equations: time 0.0003471/0.2064, allocations: 132.3 kB / 0.7109 GB, free: 0.5391 MB / 0.4981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0008196/0.2072, allocations: 198.8 kB / 0.7111 GB, free: 360 kB / 0.4981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001538/0.2088, allocations: 1.064 MB / 0.7122 GB, free: 15.26 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004684/0.2093, allocations: 0.8971 MB / 0.713 GB, free: 14.33 MB / 0.5137 GB Notification: Performance of simCode: alias equations: time 0.0006651/0.2099, allocations: 192.2 kB / 0.7132 GB, free: 14.14 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000188/0.2101, allocations: 51.39 kB / 0.7133 GB, free: 14.09 MB / 0.5137 GB Notification: Performance of SimCode: time 3.31e-07/0.2101, allocations: 0 / 0.7133 GB, free: 14.09 MB / 0.5137 GB Notification: Performance of Templates: time 0.01904/0.2292, allocations: 12.25 MB / 0.7252 GB, free: 2.004 MB / 0.5137 GB make -j1 -f BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.makefile (rm -f BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.sim & ./BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.Movers.BaseClasses.Validation.FlowMachineInterface.pipe 2>&1)