Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.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.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource") translateModel(BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001755/0.001755, 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 0.001997/0.001997, allocations: 192.9 kB / 16.25 MB, free: 6.621 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.459/1.459, allocations: 222.9 MB / 239.9 MB, free: 4.539 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002633/0.002633, allocations: 282.6 kB / 290.4 MB, free: 2.148 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 1.115/1.115, allocations: 178.6 MB / 0.507 GB, free: 4.754 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.004138/0.004138, allocations: 98.53 kB / 0.6059 GB, free: 25.06 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1859/0.1901, allocations: 89.15 MB / 0.693 GB, free: 4.707 MB / 494.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource): time 0.004286/0.1944, allocations: 2.671 MB / 0.6956 GB, free: 2.031 MB / 494.1 MB Notification: Performance of NFInst.instExpressions: time 0.002614/0.197, allocations: 1.564 MB / 0.6971 GB, free: 472 kB / 494.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 9.343e-05/0.1972, allocations: 3.938 kB / 0.6971 GB, free: 468 kB / 494.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0006507/0.1978, allocations: 156.9 kB / 0.6973 GB, free: 312 kB / 494.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0003846/0.1982, allocations: 147.5 kB / 0.6974 GB, free: 164 kB / 494.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0004386/0.1987, allocations: 167.7 kB / 0.6976 GB, free: 15.99 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.0002829/0.199, allocations: 223.2 kB / 0.6978 GB, free: 15.78 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0003224/0.1993, allocations: 143.2 kB / 0.6979 GB, free: 15.64 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001427/0.1994, allocations: 83.75 kB / 0.698 GB, free: 15.56 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002207/0.1997, allocations: 107.6 kB / 0.6981 GB, free: 15.45 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 2.433e-05/0.1997, allocations: 12 kB / 0.6981 GB, free: 15.44 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003409/0.2, allocations: 215.6 kB / 0.6983 GB, free: 15.23 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 7.836e-05/0.2001, allocations: 59.88 kB / 0.6984 GB, free: 15.17 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.0001001/0.2002, allocations: 87.53 kB / 0.6985 GB, free: 15.09 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.0004249/0.2007, allocations: 311.1 kB / 0.6988 GB, free: 14.78 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 4.088e-06/0.2007, allocations: 4 kB / 0.6988 GB, free: 14.78 MB / 0.4981 GB Notification: Performance of FrontEnd: time 1.142e-06/0.2007, allocations: 0 / 0.6988 GB, free: 14.78 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 6.361e-06/0.2007, allocations: 3.938 kB / 0.6988 GB, free: 14.77 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: 39 * Number of variables: 39 Notification: Performance of Generate backend data structure: time 0.000796/0.2015, allocations: 479.2 kB / 0.6992 GB, free: 14.26 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 3.789e-05/0.2016, allocations: 8.031 kB / 0.6992 GB, free: 14.25 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0008172/0.2024, allocations: 84.64 kB / 0.6993 GB, free: 14.17 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002754/0.2027, allocations: 232 kB / 0.6995 GB, free: 13.9 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.527e-05/0.2027, allocations: 12.66 kB / 0.6995 GB, free: 13.89 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.401e-05/0.2027, allocations: 16.36 kB / 0.6996 GB, free: 13.88 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005299/0.2033, allocations: 291.6 kB / 0.6998 GB, free: 13.56 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.614e-05/0.2033, allocations: 3.938 kB / 0.6998 GB, free: 13.55 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.94e-05/0.2033, allocations: 8 kB / 0.6999 GB, free: 13.55 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.143e-05/0.2034, allocations: 12.23 kB / 0.6999 GB, free: 13.53 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004538/0.2039, allocations: 224.4 kB / 0.7001 GB, free: 13.31 MB / 0.4981 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0022/0.2061, allocations: 1.599 MB / 0.7016 GB, free: 11.58 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0004241/0.2065, allocations: 315.3 kB / 0.7019 GB, free: 11.21 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001142/0.2066, allocations: 69.67 kB / 0.702 GB, free: 11.14 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 1.596e-05/0.2066, allocations: 160 / 0.702 GB, free: 11.14 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.975e-05/0.2067, allocations: 38.48 kB / 0.702 GB, free: 11.09 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=9): time 1.032e-06/0.2067, allocations: 0 / 0.702 GB, free: 11.09 MB / 0.4981 GB Notification: Performance of matching and sorting (n=10): time 0.0005788/0.2073, allocations: 248.6 kB / 0.7023 GB, free: 10.84 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.37e-05/0.2073, allocations: 81.14 kB / 0.7024 GB, free: 10.75 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002757/0.2076, allocations: 207.4 kB / 0.7026 GB, free: 10.53 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 2.487e-05/0.2077, allocations: 29.7 kB / 0.7026 GB, free: 10.5 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001215/0.2078, allocations: 151.6 kB / 0.7027 GB, free: 10.34 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 4.066e-05/0.2078, allocations: 43.44 kB / 0.7028 GB, free: 10.3 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 9.092e-05/0.2079, allocations: 49.69 kB / 0.7028 GB, free: 10.25 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 0.0001588/0.2081, allocations: 326.8 kB / 0.7031 GB, free: 9.918 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000173/0.2083, allocations: 80.81 kB / 0.7032 GB, free: 9.836 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000243/0.2085, allocations: 161 kB / 0.7034 GB, free: 9.641 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0003624/0.2089, allocations: 234.9 kB / 0.7036 GB, free: 9.371 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.573e-06/0.2089, allocations: 0 / 0.7036 GB, free: 9.371 MB / 0.4981 GB Notification: Performance of matching and sorting (n=25) (initialization): time 0.0005364/0.2094, allocations: 281 kB / 0.7039 GB, free: 9.09 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 2.205e-05/0.2095, allocations: 9.875 kB / 0.7039 GB, free: 9.082 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.182e-06/0.2095, allocations: 48 / 0.7039 GB, free: 9.082 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.291e-05/0.2095, allocations: 16.3 kB / 0.7039 GB, free: 9.066 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002794/0.2098, allocations: 51.91 kB / 0.7039 GB, free: 9.016 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.072e-05/0.2098, allocations: 4 kB / 0.7039 GB, free: 9.012 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000271/0.2101, allocations: 23.97 kB / 0.704 GB, free: 8.988 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.517e-05/0.2101, allocations: 12 kB / 0.704 GB, free: 8.977 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0002375/0.2104, allocations: 168 kB / 0.7041 GB, free: 8.809 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0002132/0.2106, allocations: 163.9 kB / 0.7043 GB, free: 8.609 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0003229/0.2109, allocations: 223.8 kB / 0.7045 GB, free: 8.348 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.563e-06/0.2109, allocations: 3.938 kB / 0.7045 GB, free: 8.344 MB / 0.4981 GB Notification: Performance of matching and sorting (n=25) (initialization_lambda0): time 0.0004696/0.2114, allocations: 257.1 kB / 0.7047 GB, free: 8.086 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 1.003e-05/0.2114, allocations: 8 kB / 0.7048 GB, free: 8.078 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.529e-06/0.2114, allocations: 4 kB / 0.7048 GB, free: 8.074 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.07e-06/0.2115, allocations: 4 kB / 0.7048 GB, free: 8.07 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00021/0.2117, allocations: 47.91 kB / 0.7048 GB, free: 8.023 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.598e-06/0.2117, allocations: 11.92 kB / 0.7048 GB, free: 8.012 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002305/0.2119, allocations: 24.33 kB / 0.7048 GB, free: 7.988 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.801e-05/0.212, allocations: 8 kB / 0.7048 GB, free: 7.98 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 13 * 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 (25): * Single equations (assignments): 25 * 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 prepare postOptimizeDAE: time 0.0001336/0.2121, allocations: 200.1 kB / 0.705 GB, free: 7.777 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 5.88e-05/0.2122, allocations: 15.81 kB / 0.7051 GB, free: 7.762 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002698/0.2124, allocations: 139 kB / 0.7052 GB, free: 7.617 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.19e-06/0.2124, allocations: 7.875 kB / 0.7052 GB, free: 7.609 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.332e-06/0.2125, allocations: 4 kB / 0.7052 GB, free: 7.605 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.56e-06/0.2125, allocations: 7.984 kB / 0.7052 GB, free: 7.598 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001023/0.2135, allocations: 0.7198 MB / 0.7059 GB, free: 6.793 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.545e-06/0.2135, allocations: 0 / 0.7059 GB, free: 6.793 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001088/0.2136, allocations: 27.97 kB / 0.7059 GB, free: 6.766 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.159e-06/0.2136, allocations: 4.125 kB / 0.7059 GB, free: 6.762 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.989e-05/0.2137, allocations: 8 kB / 0.7059 GB, free: 6.754 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.372e-06/0.2137, allocations: 7.938 kB / 0.706 GB, free: 6.746 MB / 0.4981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.887e-06/0.2137, allocations: 0 / 0.706 GB, free: 6.746 MB / 0.4981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0003746/0.2141, allocations: 386.3 kB / 0.7063 GB, free: 6.324 MB / 0.4981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001022/0.2142, allocations: 105 kB / 0.7064 GB, free: 6.203 MB / 0.4981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.637e-05/0.2142, allocations: 7.938 kB / 0.7064 GB, free: 6.195 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002167/0.2144, allocations: 11.98 kB / 0.7064 GB, free: 6.184 MB / 0.4981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.03e-05/0.2145, allocations: 15.88 kB / 0.7065 GB, free: 6.168 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.086e-05/0.2145, allocations: 7.984 kB / 0.7065 GB, free: 6.16 MB / 0.4981 GB Notification: Performance of sorting global known variables: time 0.0001961/0.2147, allocations: 160.8 kB / 0.7066 GB, free: 6.004 MB / 0.4981 GB Notification: Performance of sort global known variables: time 1.31e-07/0.2147, allocations: 0 / 0.7066 GB, free: 6.004 MB / 0.4981 GB Notification: Performance of remove unused functions: time 0.0005313/0.2152, allocations: 72 kB / 0.7067 GB, free: 5.934 MB / 0.4981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * 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 0.0001585/0.2154, allocations: 107.2 kB / 0.7068 GB, free: 5.82 MB / 0.4981 GB Notification: Performance of simCode: created initialization part: time 0.0005719/0.216, allocations: 287.9 kB / 0.7071 GB, free: 5.539 MB / 0.4981 GB Notification: Performance of simCode: created event and clocks part: time 2.725e-06/0.216, allocations: 0 / 0.7071 GB, free: 5.539 MB / 0.4981 GB Notification: Performance of simCode: created simulation system equations: time 0.0001004/0.2161, allocations: 65.2 kB / 0.7071 GB, free: 5.477 MB / 0.4981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004884/0.2166, allocations: 32.31 kB / 0.7072 GB, free: 5.449 MB / 0.4981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0007806/0.2174, allocations: 478.6 kB / 0.7076 GB, free: 4.93 MB / 0.4981 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006441/0.2181, allocations: 0.7363 MB / 0.7083 GB, free: 4.168 MB / 0.4981 GB Notification: Performance of simCode: alias equations: time 0.0002629/0.2183, allocations: 81.39 kB / 0.7084 GB, free: 4.086 MB / 0.4981 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 5.942e-05/0.2184, allocations: 27.36 kB / 0.7084 GB, free: 4.062 MB / 0.4981 GB Notification: Performance of SimCode: time 2.8e-07/0.2184, allocations: 0 / 0.7084 GB, free: 4.062 MB / 0.4981 GB Notification: Performance of Templates: time 0.005513/0.2239, allocations: 1.887 MB / 0.7103 GB, free: 2.211 MB / 0.4981 GB make -j1 -f BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.makefile (rm -f BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.pipe ; mkfifo BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.pipe >> ../files/BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.sim & ./BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Electrical.AC.ThreePhasesBalanced.Sources.Examples.FixedVoltageSource.pipe 2>&1)