Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.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/BuildSysPro 3.6.0/package.mo", uses=false) Using package BuildSysPro with version 3.5.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/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(BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density") translateModel(BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.006375/0.006375, allocations: 99.75 kB / 15.73 MB, free: 6.039 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001242/0.001242, allocations: 191.9 kB / 16.67 MB, free: 5.949 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.352/1.352, allocations: 222.9 MB / 240.4 MB, free: 15.1 MB / 206.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/Building/BuildingEnvelope/HeatTransfer/package.mo:2:1-40:17:writable] Warning: Soil_case_nappe was referenced in the package.order file, but was not found in package.mo, Soil_case_nappe/package.mo or Soil_case_nappe.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/package.mo): time 0.8539/0.8539, allocations: 143 MB / 433.6 MB, free: 11.98 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001151/0.001151, allocations: 68.2 kB / 0.5955 GB, free: 12.26 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1658/0.167, allocations: 82.03 MB / 0.6756 GB, free: 10.32 MB / 0.5137 GB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density): time 0.6681/0.8351, allocations: 185.1 MB / 0.8564 GB, free: 4.145 MB / 0.6231 GB Notification: Performance of NFInst.instExpressions: time 0.0112/0.8463, allocations: 6.994 MB / 0.8633 GB, free: 13.62 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001122/0.8475, allocations: 27.88 kB / 0.8633 GB, free: 13.59 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.001207/0.8487, allocations: 397.5 kB / 0.8637 GB, free: 13.2 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.003706/0.8525, allocations: 1.447 MB / 0.8651 GB, free: 11.75 MB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.0031/0.8556, allocations: 1.171 MB / 0.8662 GB, free: 10.58 MB / 0.6387 GB Notification: Performance of NFFlatten.flatten: time 0.002439/0.858, allocations: 1.933 MB / 0.8681 GB, free: 8.645 MB / 0.6387 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0009535/0.859, allocations: 0.6648 MB / 0.8688 GB, free: 7.969 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001504/0.8605, allocations: 0.8211 MB / 0.8696 GB, free: 7.145 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001189/0.8617, allocations: 0.6036 MB / 0.8702 GB, free: 6.547 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.000109/0.8618, allocations: 68 kB / 0.8702 GB, free: 6.48 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003725/0.8656, allocations: 1.929 MB / 0.8721 GB, free: 4.547 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.0004582/0.866, allocations: 295.2 kB / 0.8724 GB, free: 4.258 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.0004526/0.8665, allocations: 438 kB / 0.8728 GB, free: 3.828 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.002893/0.8694, allocations: 1.818 MB / 0.8746 GB, free: 2.004 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 4.479e-06/0.8694, allocations: 0 / 0.8746 GB, free: 2.004 MB / 0.6387 GB Notification: Performance of FrontEnd: time 1.834e-06/0.8694, allocations: 0 / 0.8746 GB, free: 2.004 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 1.036e-05/0.8694, allocations: 0 / 0.8746 GB, free: 2.004 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 131 * Number of variables: 131 Notification: Performance of Generate backend data structure: time 0.001793/0.8712, allocations: 1.2 MB / 0.8757 GB, free: 0.7539 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 4.121e-05/0.8713, allocations: 8.031 kB / 0.8758 GB, free: 0.7461 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001848/0.8731, allocations: 271.2 kB / 0.876 GB, free: 492 kB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009524/0.8741, allocations: 0.6227 MB / 0.8766 GB, free: 15.81 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.528e-05/0.8742, allocations: 37.31 kB / 0.8767 GB, free: 15.77 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 9.867e-05/0.8743, allocations: 63.95 kB / 0.8767 GB, free: 15.71 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001047/0.8753, allocations: 0.6284 MB / 0.8773 GB, free: 15.07 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.104e-05/0.8754, allocations: 7.938 kB / 0.8773 GB, free: 15.06 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.487e-05/0.8754, allocations: 27.94 kB / 0.8774 GB, free: 15.03 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.982e-05/0.8755, allocations: 17.31 kB / 0.8774 GB, free: 15.02 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0009408/0.8764, allocations: 0.5165 MB / 0.8779 GB, free: 14.5 MB / 0.6544 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 0.002949/0.8794, allocations: 2.461 MB / 0.8803 GB, free: 11.83 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006821/0.8801, allocations: 367.5 kB / 0.8806 GB, free: 11.46 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000402/0.8805, allocations: 234.2 kB / 0.8809 GB, free: 11.23 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005813/0.8811, allocations: 299.6 kB / 0.8811 GB, free: 10.88 MB / 0.6544 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.57e-05/0.8811, allocations: 42.89 kB / 0.8812 GB, free: 10.83 MB / 0.6544 GB Notification: Performance of pre-optimization done (n=39): time 2.364e-06/0.8811, allocations: 0 / 0.8812 GB, free: 10.83 MB / 0.6544 GB Notification: Performance of matching and sorting (n=39): time 0.001391/0.8825, allocations: 0.615 MB / 0.8818 GB, free: 10.21 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.852e-05/0.8826, allocations: 55.41 kB / 0.8818 GB, free: 10.14 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005664/0.8832, allocations: 0.5029 MB / 0.8823 GB, free: 9.629 MB / 0.6544 GB Notification: Performance of collectPreVariables (initialization): time 4.073e-05/0.8832, allocations: 37.7 kB / 0.8824 GB, free: 9.586 MB / 0.6544 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002348/0.8834, allocations: 329 kB / 0.8827 GB, free: 9.262 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001252/0.8836, allocations: 146.7 kB / 0.8828 GB, free: 9.117 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.00016/0.8837, allocations: 94.08 kB / 0.8829 GB, free: 9.02 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 0.0001499/0.8839, allocations: 366.7 kB / 0.8833 GB, free: 8.652 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003351/0.8842, allocations: 178.4 kB / 0.8834 GB, free: 8.477 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004041/0.8847, allocations: 283.4 kB / 0.8837 GB, free: 8.156 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0007075/0.8854, allocations: 456.2 kB / 0.8841 GB, free: 7.68 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.206e-06/0.8854, allocations: 0 / 0.8841 GB, free: 7.68 MB / 0.6544 GB Notification: Performance of matching and sorting (n=53) (initialization): time 0.0008918/0.8863, allocations: 0.5243 MB / 0.8847 GB, free: 7.148 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 1.871e-05/0.8863, allocations: 4.281 kB / 0.8847 GB, free: 7.145 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.799e-06/0.8863, allocations: 11.94 kB / 0.8847 GB, free: 7.133 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.161e-05/0.8864, allocations: 4 kB / 0.8847 GB, free: 7.129 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007072/0.8871, allocations: 131.8 kB / 0.8848 GB, free: 7 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.000405/0.8875, allocations: 0.5899 MB / 0.8854 GB, free: 6.387 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005453/0.888, allocations: 59.73 kB / 0.8854 GB, free: 6.328 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.709e-05/0.8881, allocations: 20 kB / 0.8854 GB, free: 6.309 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0005927/0.8887, allocations: 345.7 kB / 0.8858 GB, free: 5.969 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000408/0.8891, allocations: 291.3 kB / 0.8861 GB, free: 5.648 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0007074/0.8898, allocations: 448.4 kB / 0.8865 GB, free: 5.18 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.975e-06/0.8898, allocations: 0.7031 kB / 0.8865 GB, free: 5.18 MB / 0.6544 GB Notification: Performance of matching and sorting (n=53) (initialization_lambda0): time 0.0008928/0.8907, allocations: 0.532 MB / 0.887 GB, free: 4.641 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 1.266e-05/0.8908, allocations: 6.969 kB / 0.887 GB, free: 4.637 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.208e-06/0.8908, allocations: 4 kB / 0.887 GB, free: 4.633 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.278e-05/0.8908, allocations: 11.88 kB / 0.887 GB, free: 4.625 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004821/0.8913, allocations: 116.1 kB / 0.8871 GB, free: 4.512 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.832e-06/0.8913, allocations: 8 kB / 0.8871 GB, free: 4.504 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004956/0.8918, allocations: 39.81 kB / 0.8872 GB, free: 4.465 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.811e-05/0.8919, allocations: 20 kB / 0.8872 GB, free: 4.445 MB / 0.6544 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 10 * 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 (53): * Single equations (assignments): 52 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * 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): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0001953/0.8921, allocations: 214.3 kB / 0.8874 GB, free: 4.23 MB / 0.6544 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000109/0.8922, allocations: 59.62 kB / 0.8875 GB, free: 4.172 MB / 0.6544 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0009396/0.8931, allocations: 494.4 kB / 0.8879 GB, free: 3.676 MB / 0.6544 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.881e-06/0.8931, allocations: 4 kB / 0.8879 GB, free: 3.672 MB / 0.6544 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.821e-06/0.8931, allocations: 0 / 0.8879 GB, free: 3.672 MB / 0.6544 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0007978/0.8939, allocations: 0.7081 MB / 0.8886 GB, free: 2.879 MB / 0.6544 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001987/0.8959, allocations: 1.281 MB / 0.8899 GB, free: 1.52 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.709e-06/0.896, allocations: 0 / 0.8899 GB, free: 1.52 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006535/0.8966, allocations: 133.5 kB / 0.89 GB, free: 1.391 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (simulation): time 4.639e-06/0.8966, allocations: 3.938 kB / 0.89 GB, free: 1.387 MB / 0.6544 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.515e-05/0.8967, allocations: 16 kB / 0.89 GB, free: 1.371 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0003659/0.897, allocations: 0.5899 MB / 0.8906 GB, free: 0.7578 MB / 0.6544 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.064e-06/0.8971, allocations: 0 / 0.8906 GB, free: 0.7578 MB / 0.6544 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001213/0.8983, allocations: 0.8023 MB / 0.8914 GB, free: 15.92 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002334/0.8985, allocations: 188.7 kB / 0.8916 GB, free: 15.71 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.642e-05/0.8986, allocations: 11.94 kB / 0.8916 GB, free: 15.7 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004024/0.899, allocations: 19.98 kB / 0.8916 GB, free: 15.68 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.831e-05/0.8991, allocations: 31.89 kB / 0.8916 GB, free: 15.65 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.009e-05/0.8991, allocations: 12 kB / 0.8916 GB, free: 15.64 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.0004117/0.8996, allocations: 354.8 kB / 0.892 GB, free: 15.3 MB / 0.67 GB Notification: Performance of sort global known variables: time 2e-07/0.8996, allocations: 4 kB / 0.892 GB, free: 15.29 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.0009886/0.9006, allocations: 367.3 kB / 0.8923 GB, free: 14.93 MB / 0.67 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 4 (vol.dynBal.medium.Xi[1],vol.dynBal.U,vol.dynBal.m,senDenFlo.d) * 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 (39): * Single equations (assignments): 38 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * 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): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0004937/0.9011, allocations: 206.4 kB / 0.8925 GB, free: 14.73 MB / 0.67 GB Notification: Performance of simCode: created initialization part: time 0.001442/0.9025, allocations: 0.6721 MB / 0.8932 GB, free: 14.06 MB / 0.67 GB Notification: Performance of simCode: created event and clocks part: time 4.148e-06/0.9025, allocations: 0 / 0.8932 GB, free: 14.06 MB / 0.67 GB Notification: Performance of simCode: created simulation system equations: time 0.0004279/0.903, allocations: 223.9 kB / 0.8934 GB, free: 13.84 MB / 0.67 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001636/0.9046, allocations: 361 kB / 0.8937 GB, free: 13.5 MB / 0.67 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002203/0.9068, allocations: 1.396 MB / 0.8951 GB, free: 12.06 MB / 0.67 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005342/0.9074, allocations: 0.9495 MB / 0.896 GB, free: 11.08 MB / 0.67 GB Notification: Performance of simCode: alias equations: time 0.0006312/0.908, allocations: 204.9 kB / 0.8962 GB, free: 10.88 MB / 0.67 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001351/0.9082, allocations: 47.44 kB / 0.8963 GB, free: 10.83 MB / 0.67 GB Notification: Performance of SimCode: time 2.224e-06/0.9082, allocations: 4 kB / 0.8963 GB, free: 10.83 MB / 0.67 GB Notification: Performance of Templates: time 0.02265/0.9308, allocations: 12.53 MB / 0.9085 GB, free: 14.48 MB / 0.6856 GB make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.makefile (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.Sensors.Examples.Density.pipe 2>&1)