Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.5.0/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+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/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/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 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package BuildSysPro with version 3.4.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.5.0/package.mo) Running command: translateModel(BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector") translateModel(BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.5.0/package.mo): time 0.7023/0.7023, allocations: 128.7 MB / 144.5 MB, free: 1.359 MB / 106.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001186/0.001186, allocations: 188.4 kB / 174.2 MB, free: 5.945 MB / 138.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.351/1.351, allocations: 205 MB / 408.9 MB, free: 9.746 MB / 298.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0009435/0.0009434, allocations: 99.45 kB / 485.1 MB, free: 13.6 MB / 378.7 MB Notification: Performance of FrontEnd - loaded program: time 0.001077/0.001078, allocations: 59.3 kB / 0.558 GB, free: 97.4 MB / 442.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1155/0.1166, allocations: 75.47 MB / 0.6317 GB, free: 33.06 MB / 442.7 MB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector): time 0.03062/0.1473, allocations: 44.21 MB / 0.6749 GB, free: 4.684 MB / 458.7 MB Notification: Performance of NFInst.instExpressions: time 0.011/0.1583, allocations: 8.935 MB / 0.6836 GB, free: 11.73 MB / 474.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0009951/0.1593, allocations: 35.81 kB / 0.6836 GB, free: 11.7 MB / 474.7 MB Notification: Performance of NFTyping.typeComponents: time 0.001254/0.1606, allocations: 0.4935 MB / 0.6841 GB, free: 11.2 MB / 474.7 MB Notification: Performance of NFTyping.typeBindings: time 0.002389/0.1631, allocations: 1.194 MB / 0.6853 GB, free: 10 MB / 474.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.002096/0.1652, allocations: 0.9868 MB / 0.6862 GB, free: 9.02 MB / 474.7 MB Notification: Performance of NFFlatten.flatten: time 0.002875/0.1681, allocations: 3.476 MB / 0.6896 GB, free: 5.535 MB / 474.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0008966/0.169, allocations: 0.7694 MB / 0.6904 GB, free: 4.746 MB / 474.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.001371/0.1704, allocations: 0.9333 MB / 0.6913 GB, free: 3.809 MB / 474.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0007574/0.1711, allocations: 0.7622 MB / 0.692 GB, free: 3.043 MB / 474.7 MB Notification: Performance of NFPackage.collectConstants: time 0.0001011/0.1712, allocations: 52 kB / 0.6921 GB, free: 2.992 MB / 474.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.001615/0.1729, allocations: 1.014 MB / 0.6931 GB, free: 1.977 MB / 474.7 MB Notification: Performance of NFScalarize.scalarize: time 0.0002204/0.1731, allocations: 270.9 kB / 0.6933 GB, free: 1.711 MB / 474.7 MB Notification: Performance of NFVerifyModel.verify: time 0.000498/0.1736, allocations: 0.5829 MB / 0.6939 GB, free: 1.125 MB / 474.7 MB Notification: Performance of NFConvertDAE.convert: time 0.002082/0.1757, allocations: 2.38 MB / 0.6962 GB, free: 14.74 MB / 490.7 MB Notification: Performance of FrontEnd - DAE generated: time 5.099e-06/0.1757, allocations: 0 / 0.6962 GB, free: 14.74 MB / 490.7 MB Notification: Performance of FrontEnd: time 1.282e-06/0.1757, allocations: 0 / 0.6962 GB, free: 14.74 MB / 490.7 MB Notification: Performance of Transformations before backend: time 1.254e-05/0.1757, allocations: 0 / 0.6962 GB, free: 14.74 MB / 490.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 165 * Number of variables: 165 Notification: Performance of Generate backend data structure: time 0.002421/0.1782, allocations: 1.748 MB / 0.6979 GB, free: 12.89 MB / 490.7 MB Notification: Performance of prepare preOptimizeDAE: time 3.701e-05/0.1782, allocations: 8.031 kB / 0.6979 GB, free: 12.88 MB / 490.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003143/0.1785, allocations: 139.4 kB / 0.6981 GB, free: 12.75 MB / 490.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001494/0.18, allocations: 1.062 MB / 0.6991 GB, free: 11.64 MB / 490.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.198e-05/0.1801, allocations: 57.25 kB / 0.6992 GB, free: 11.59 MB / 490.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 9.266e-05/0.1802, allocations: 72 kB / 0.6992 GB, free: 11.52 MB / 490.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001418/0.1816, allocations: 0.8716 MB / 0.7001 GB, free: 10.61 MB / 490.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.948e-05/0.1816, allocations: 4 kB / 0.7001 GB, free: 10.61 MB / 490.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.746e-05/0.1817, allocations: 32 kB / 0.7001 GB, free: 10.58 MB / 490.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.435e-05/0.1817, allocations: 16 kB / 0.7001 GB, free: 10.56 MB / 490.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001211/0.183, allocations: 0.657 MB / 0.7008 GB, free: 9.906 MB / 490.7 MB 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 0.003596/0.1866, allocations: 3.563 MB / 0.7043 GB, free: 6.152 MB / 490.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0009385/0.1875, allocations: 468.2 kB / 0.7047 GB, free: 5.688 MB / 490.7 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.000399/0.1879, allocations: 293 kB / 0.705 GB, free: 5.398 MB / 490.7 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0006229/0.1886, allocations: 0.6012 MB / 0.7056 GB, free: 4.668 MB / 490.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.319e-05/0.1886, allocations: 38.56 kB / 0.7056 GB, free: 4.621 MB / 490.7 MB Notification: Performance of pre-optimization done (n=34): time 2.274e-06/0.1886, allocations: 0 / 0.7056 GB, free: 4.621 MB / 490.7 MB Notification: Performance of matching and sorting (n=34): time 0.001928/0.1905, allocations: 1.015 MB / 0.7066 GB, free: 3.582 MB / 490.7 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.119e-05/0.1906, allocations: 140.4 kB / 0.7067 GB, free: 3.414 MB / 490.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001243/0.1919, allocations: 1.108 MB / 0.7078 GB, free: 2.289 MB / 490.7 MB Notification: Performance of collectPreVariables (initialization): time 4.292e-05/0.1919, allocations: 37.7 kB / 0.7079 GB, free: 2.246 MB / 490.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.0003584/0.1923, allocations: 0.4885 MB / 0.7083 GB, free: 1.75 MB / 490.7 MB Notification: Performance of collectInitialBindings (initialization): time 9.896e-05/0.1924, allocations: 114.3 kB / 0.7084 GB, free: 1.637 MB / 490.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001821/0.1926, allocations: 122.1 kB / 0.7086 GB, free: 1.512 MB / 490.7 MB Notification: Performance of setup shared object (initialization): time 9.944e-05/0.1927, allocations: 330 kB / 0.7089 GB, free: 1.184 MB / 490.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005045/0.1932, allocations: 358.9 kB / 0.7092 GB, free: 0.832 MB / 490.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006016/0.1938, allocations: 488.4 kB / 0.7097 GB, free: 308 kB / 490.7 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001106/0.1949, allocations: 1.009 MB / 0.7107 GB, free: 15.2 MB / 0.4948 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.069e-06/0.195, allocations: 4.062 kB / 0.7107 GB, free: 15.19 MB / 0.4948 GB Notification: Performance of matching and sorting (n=66) (initialization): time 0.001435/0.1964, allocations: 1.137 MB / 0.7118 GB, free: 14.01 MB / 0.4948 GB Notification: Performance of prepare postOptimizeDAE: time 9.561e-05/0.1965, allocations: 192.3 kB / 0.712 GB, free: 13.79 MB / 0.4948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.355e-06/0.1965, allocations: 3.938 kB / 0.712 GB, free: 13.79 MB / 0.4948 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.813e-05/0.1965, allocations: 16.31 kB / 0.712 GB, free: 13.77 MB / 0.4948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003775/0.1969, allocations: 95.89 kB / 0.7121 GB, free: 13.68 MB / 0.4948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.089e-05/0.1969, allocations: 7.984 kB / 0.7121 GB, free: 13.67 MB / 0.4948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000634/0.1976, allocations: 119.1 kB / 0.7122 GB, free: 13.55 MB / 0.4948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.495e-05/0.1976, allocations: 24 kB / 0.7122 GB, free: 13.53 MB / 0.4948 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007395/0.1984, allocations: 0.5986 MB / 0.7128 GB, free: 12.93 MB / 0.4948 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005908/0.199, allocations: 480.4 kB / 0.7133 GB, free: 12.4 MB / 0.4948 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001035/0.2, allocations: 0.9999 MB / 0.7142 GB, free: 11.31 MB / 0.4948 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.014e-06/0.2001, allocations: 0 / 0.7142 GB, free: 11.31 MB / 0.4948 GB Notification: Performance of matching and sorting (n=66) (initialization_lambda0): time 0.001368/0.2014, allocations: 1.115 MB / 0.7153 GB, free: 10.14 MB / 0.4948 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001102/0.2016, allocations: 186.2 kB / 0.7155 GB, free: 9.926 MB / 0.4948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.831e-06/0.2016, allocations: 4 kB / 0.7155 GB, free: 9.922 MB / 0.4948 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.114e-05/0.2016, allocations: 7.938 kB / 0.7155 GB, free: 9.914 MB / 0.4948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003342/0.2019, allocations: 99.83 kB / 0.7156 GB, free: 9.816 MB / 0.4948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.412e-06/0.2019, allocations: 4 kB / 0.7156 GB, free: 9.812 MB / 0.4948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005697/0.2025, allocations: 87.72 kB / 0.7157 GB, free: 9.727 MB / 0.4948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.458e-05/0.2026, allocations: 27.98 kB / 0.7157 GB, free: 9.699 MB / 0.4948 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 13 * 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 (57): * Single equations (assignments): 51 * 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 0.0001938/0.2028, allocations: 309.2 kB / 0.716 GB, free: 9.371 MB / 0.4948 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001375/0.2029, allocations: 98.78 kB / 0.7161 GB, free: 9.273 MB / 0.4948 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00129/0.2042, allocations: 0.8612 MB / 0.7169 GB, free: 8.391 MB / 0.4948 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.546e-06/0.2042, allocations: 4 kB / 0.717 GB, free: 8.387 MB / 0.4948 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.121e-06/0.2042, allocations: 4 kB / 0.717 GB, free: 8.383 MB / 0.4948 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001071/0.2053, allocations: 0.9329 MB / 0.7179 GB, free: 7.363 MB / 0.4948 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002689/0.208, allocations: 2.019 MB / 0.7198 GB, free: 5.23 MB / 0.4948 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.199e-06/0.208, allocations: 0 / 0.7198 GB, free: 5.23 MB / 0.4948 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002764/0.2083, allocations: 64.06 kB / 0.7199 GB, free: 5.168 MB / 0.4948 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.38e-06/0.2083, allocations: 8 kB / 0.7199 GB, free: 5.16 MB / 0.4948 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.671e-05/0.2084, allocations: 15.98 kB / 0.7199 GB, free: 5.145 MB / 0.4948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.038e-06/0.2084, allocations: 4 kB / 0.7199 GB, free: 5.141 MB / 0.4948 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.482e-06/0.2084, allocations: 12 kB / 0.7199 GB, free: 5.129 MB / 0.4948 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01049/0.2189, allocations: 7.317 MB / 0.7271 GB, free: 13.56 MB / 0.5105 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003429/0.2193, allocations: 283.5 kB / 0.7274 GB, free: 13.27 MB / 0.5105 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001088/0.2194, allocations: 11.98 kB / 0.7274 GB, free: 13.25 MB / 0.5105 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004924/0.2199, allocations: 48.02 kB / 0.7274 GB, free: 13.21 MB / 0.5105 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001195/0.22, allocations: 47.89 kB / 0.7275 GB, free: 13.16 MB / 0.5105 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.921e-05/0.2201, allocations: 15.94 kB / 0.7275 GB, free: 13.14 MB / 0.5105 GB Notification: Performance of sorting global known variables: time 0.000921/0.221, allocations: 0.8049 MB / 0.7283 GB, free: 12.33 MB / 0.5105 GB Notification: Performance of sort global known variables: time 1.5e-07/0.221, allocations: 0 / 0.7283 GB, free: 12.33 MB / 0.5105 GB Notification: Performance of remove unused functions: time 0.001906/0.2229, allocations: 0.8116 MB / 0.7291 GB, free: 11.52 MB / 0.5105 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * 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 (32): * Single equations (assignments): 27 * Array equations: 0 * Algorithm blocks: 3 * Record equations: 2 * 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 0.0007507/0.2237, allocations: 408.4 kB / 0.7294 GB, free: 11.12 MB / 0.5105 GB Notification: Performance of simCode: created initialization part: time 0.002075/0.2257, allocations: 1.951 MB / 0.7313 GB, free: 9.023 MB / 0.5105 GB Notification: Performance of simCode: created event and clocks part: time 2.906e-06/0.2258, allocations: 0 / 0.7313 GB, free: 9.023 MB / 0.5105 GB Notification: Performance of simCode: created simulation system equations: time 0.0005945/0.2264, allocations: 0.5057 MB / 0.7318 GB, free: 8.48 MB / 0.5105 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002188/0.2286, allocations: 0.5228 MB / 0.7324 GB, free: 7.961 MB / 0.5105 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002782/0.2314, allocations: 2.677 MB / 0.735 GB, free: 5.18 MB / 0.5105 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005464/0.2319, allocations: 1.076 MB / 0.736 GB, free: 4.074 MB / 0.5105 GB Notification: Performance of simCode: alias equations: time 0.0006512/0.2326, allocations: 210.6 kB / 0.7362 GB, free: 3.879 MB / 0.5105 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001786/0.2328, allocations: 83.41 kB / 0.7363 GB, free: 3.797 MB / 0.5105 GB Notification: Performance of SimCode: time 2.4e-07/0.2328, allocations: 0 / 0.7363 GB, free: 3.797 MB / 0.5105 GB Notification: Performance of Templates: time 0.248/0.4808, allocations: 26.15 MB / 0.7618 GB, free: 96.14 MB / 0.5105 GB make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.makefile (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatExchangers.ActiveBeams.BaseClasses.Examples.Convector.pipe 2>&1)