Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization.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: "" <> buildModelFMU(IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Actuators_Valves_Validation_ThreeWayValveParameterization",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Actuators_Valves_Validation_ThreeWayValveParameterization",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001151/0.001151, allocations: 100.8 kB / 16.27 MB, free: 5.93 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001163/0.001163, allocations: 189.6 kB / 17.2 MB, free: 5.574 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.206/1.206, allocations: 222.9 MB / 240.9 MB, free: 15.27 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.6752/0.6752, allocations: 122.9 MB / 413.9 MB, free: 15.84 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.00115/0.00115, allocations: 59.91 kB / 0.4912 GB, free: 7.328 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2713/0.2725, allocations: 77.92 MB / 0.5673 GB, free: 32.94 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization): time 0.1171/0.3896, allocations: 154.4 MB / 0.718 GB, free: 188 kB / 0.545 GB Notification: Performance of NFInst.instExpressions: time 0.03377/0.4234, allocations: 30.41 MB / 0.7477 GB, free: 1.703 MB / 0.5762 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003137/0.4266, allocations: 139.1 kB / 0.7478 GB, free: 1.566 MB / 0.5762 GB Notification: Performance of NFTyping.typeComponents: time 0.001979/0.4287, allocations: 1.032 MB / 0.7489 GB, free: 0.5273 MB / 0.5762 GB Notification: Performance of NFTyping.typeBindings: time 0.2373/0.666, allocations: 3.163 MB / 0.7519 GB, free: 37.73 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.004626/0.6706, allocations: 2.466 MB / 0.7544 GB, free: 37.71 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.00534/0.676, allocations: 5.371 MB / 0.7596 GB, free: 37.71 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002381/0.6784, allocations: 2.237 MB / 0.7618 GB, free: 37.47 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003963/0.6823, allocations: 2.69 MB / 0.7644 GB, free: 37.46 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001941/0.6843, allocations: 1.96 MB / 0.7663 GB, free: 37.32 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0002854/0.6846, allocations: 213.9 kB / 0.7665 GB, free: 37.32 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001858/0.6864, allocations: 1.092 MB / 0.7676 GB, free: 37.32 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0003761/0.6868, allocations: 0.5571 MB / 0.7681 GB, free: 37.23 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.001004/0.6878, allocations: 1.267 MB / 0.7694 GB, free: 36.86 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.002568/0.6904, allocations: 3.29 MB / 0.7726 GB, free: 36.44 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 3.146e-06/0.6904, allocations: 0 / 0.7726 GB, free: 36.44 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.162e-06/0.6904, allocations: 0 / 0.7726 GB, free: 36.44 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 2.411e-05/0.6905, allocations: 1.062 kB / 0.7726 GB, free: 36.44 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 297 * Number of variables: 297 Notification: Performance of Generate backend data structure: time 0.003587/0.694, allocations: 2.789 MB / 0.7753 GB, free: 35.11 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.092e-05/0.6941, allocations: 9.5 kB / 0.7753 GB, free: 35.11 MB / 0.5762 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001619/0.6943, allocations: 174.9 kB / 0.7755 GB, free: 35.06 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003081/0.6946, allocations: 262.5 kB / 0.7757 GB, free: 34.93 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001518/0.6961, allocations: 1.443 MB / 0.7771 GB, free: 34.41 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.019e-05/0.6962, allocations: 101.9 kB / 0.7772 GB, free: 34.41 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001561/0.6963, allocations: 137.6 kB / 0.7774 GB, free: 34.41 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001548/0.6979, allocations: 1.165 MB / 0.7785 GB, free: 34.33 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.089e-05/0.6979, allocations: 0 / 0.7785 GB, free: 34.33 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.624e-05/0.698, allocations: 51.59 kB / 0.7786 GB, free: 34.32 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.551e-05/0.698, allocations: 27.75 kB / 0.7786 GB, free: 34.32 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001432/0.6995, allocations: 1.009 MB / 0.7796 GB, free: 34.31 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 0.006817/0.7063, allocations: 6.373 MB / 0.7858 GB, free: 31.61 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007287/0.707, allocations: 0.5764 MB / 0.7864 GB, free: 31.58 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004527/0.7075, allocations: 382.9 kB / 0.7867 GB, free: 31.57 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002365/0.7077, allocations: 0.5045 MB / 0.7872 GB, free: 31.01 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 1.631e-05/0.7078, allocations: 40.31 kB / 0.7873 GB, free: 30.97 MB / 0.5762 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0009154/0.7087, allocations: 230.1 kB / 0.7875 GB, free: 30.92 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=58): time 1.934e-06/0.7087, allocations: 0 / 0.7875 GB, free: 30.92 MB / 0.5762 GB Notification: Performance of matching and sorting (n=58): time 0.001668/0.7104, allocations: 1.166 MB / 0.7886 GB, free: 30.76 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.198e-05/0.7104, allocations: 59.41 kB / 0.7887 GB, free: 30.7 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001676/0.7121, allocations: 1.9 MB / 0.7905 GB, free: 30.46 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 7.1e-05/0.7122, allocations: 44.05 kB / 0.7906 GB, free: 30.43 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004738/0.7126, allocations: 0.9113 MB / 0.7915 GB, free: 30.16 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001187/0.7128, allocations: 210.5 kB / 0.7917 GB, free: 30.04 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003382/0.7131, allocations: 293.5 kB / 0.7919 GB, free: 30.01 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 5.447e-05/0.7132, allocations: 350 kB / 0.7923 GB, free: 29.7 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006337/0.7138, allocations: 456.9 kB / 0.7927 GB, free: 29.69 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007808/0.7146, allocations: 0.6808 MB / 0.7934 GB, free: 29.48 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001226/0.7158, allocations: 0.9759 MB / 0.7943 GB, free: 29.34 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.318e-06/0.7158, allocations: 3.938 kB / 0.7943 GB, free: 29.34 MB / 0.5762 GB Notification: Performance of matching and sorting (n=144) (initialization): time 0.001876/0.7177, allocations: 1.407 MB / 0.7957 GB, free: 29.18 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.393e-05/0.7177, allocations: 5 kB / 0.7957 GB, free: 29.18 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.363e-06/0.7178, allocations: 6.594 kB / 0.7957 GB, free: 29.18 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.673e-05/0.7178, allocations: 8.094 kB / 0.7957 GB, free: 29.18 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00107/0.7189, allocations: 281.8 kB / 0.796 GB, free: 29.18 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.244e-05/0.7189, allocations: 11.44 kB / 0.796 GB, free: 29.18 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001132/0.72, allocations: 77.45 kB / 0.7961 GB, free: 29.17 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.256e-05/0.7201, allocations: 60.58 kB / 0.7961 GB, free: 29.17 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0009335/0.7211, allocations: 0.7063 MB / 0.7968 GB, free: 29.09 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0007196/0.7218, allocations: 0.6616 MB / 0.7975 GB, free: 28.86 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001117/0.7229, allocations: 0.9213 MB / 0.7984 GB, free: 28.73 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.246e-06/0.7229, allocations: 2.531 kB / 0.7984 GB, free: 28.73 MB / 0.5762 GB Notification: Performance of matching and sorting (n=144) (initialization_lambda0): time 0.00174/0.7247, allocations: 1.353 MB / 0.7997 GB, free: 28.56 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 7.754e-06/0.7247, allocations: 4.844 kB / 0.7997 GB, free: 28.56 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.02e-06/0.7247, allocations: 8.625 kB / 0.7997 GB, free: 28.55 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.602e-06/0.7247, allocations: 7.906 kB / 0.7997 GB, free: 28.55 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009926/0.7257, allocations: 274 kB / 0.8 GB, free: 28.55 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.318e-06/0.7257, allocations: 10.53 kB / 0.8 GB, free: 28.55 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001162/0.7269, allocations: 88.83 kB / 0.8001 GB, free: 28.55 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.933e-05/0.727, allocations: 56.36 kB / 0.8001 GB, free: 28.55 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 14 * 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 (144): * Single equations (assignments): 144 * 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 0.0001623/0.7271, allocations: 247.2 kB / 0.8004 GB, free: 28.36 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002126/0.7274, allocations: 199.2 kB / 0.8006 GB, free: 28.25 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001627/0.729, allocations: 1.101 MB / 0.8016 GB, free: 28.16 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.095e-05/0.729, allocations: 11.73 kB / 0.8016 GB, free: 28.15 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.438e-06/0.729, allocations: 0 / 0.8016 GB, free: 28.15 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.296e-06/0.729, allocations: 4.828 kB / 0.8016 GB, free: 28.15 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002526/0.7316, allocations: 2.455 MB / 0.804 GB, free: 27.35 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.288e-06/0.7316, allocations: 0 / 0.804 GB, free: 27.35 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005152/0.7321, allocations: 130.8 kB / 0.8042 GB, free: 27.34 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.039e-06/0.7321, allocations: 9.234 kB / 0.8042 GB, free: 27.33 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.653e-05/0.7322, allocations: 16.47 kB / 0.8042 GB, free: 27.33 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.679e-06/0.7322, allocations: 9.781 kB / 0.8042 GB, free: 27.33 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.372e-06/0.7322, allocations: 0 / 0.8042 GB, free: 27.33 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001118/0.7333, allocations: 1.075 MB / 0.8052 GB, free: 26.95 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003462/0.7336, allocations: 359 kB / 0.8056 GB, free: 26.7 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000199/0.7339, allocations: 19.39 kB / 0.8056 GB, free: 26.7 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007096/0.7346, allocations: 35.59 kB / 0.8056 GB, free: 26.68 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.792e-05/0.7347, allocations: 57.05 kB / 0.8057 GB, free: 26.66 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.815e-05/0.7347, allocations: 22.31 kB / 0.8057 GB, free: 26.66 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.00114/0.7359, allocations: 1.256 MB / 0.8069 GB, free: 26.32 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.3e-07/0.7359, allocations: 0 / 0.8069 GB, free: 26.32 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.001525/0.7374, allocations: 0.8904 MB / 0.8078 GB, free: 26.2 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * 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 (77): * Single equations (assignments): 74 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * 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 0.001655/0.739, allocations: 1.86 MB / 0.8096 GB, free: 25.23 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.00225/0.7413, allocations: 1.668 MB / 0.8113 GB, free: 24.25 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 1.983e-06/0.7413, allocations: 0 / 0.8113 GB, free: 24.25 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.0004605/0.7418, allocations: 415.2 kB / 0.8117 GB, free: 24 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003656/0.7455, allocations: 1.079 MB / 0.8127 GB, free: 23.16 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01306/0.7585, allocations: 15.15 MB / 0.8275 GB, free: 8.473 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005147/0.7591, allocations: 1.413 MB / 0.8289 GB, free: 7.027 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.001304/0.7604, allocations: 400.2 kB / 0.8293 GB, free: 6.641 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007674/0.7611, allocations: 0.8273 MB / 0.8301 GB, free: 5.816 MB / 0.5762 GB Notification: Performance of SimCode: time 2.51e-07/0.7611, allocations: 0 / 0.8301 GB, free: 5.816 MB / 0.5762 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 1.953/2.714, allocations: 55.54 MB / 0.8843 GB, free: 15.14 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 9.502/12.22, allocations: 14.44 kB / 0.8843 GB, free: 15.13 MB / 0.6387 GB (rm -f IBPSA_latest_IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IBPSA_latest_IBPSA_Fluid_Actuators_Valves_Validation_ThreeWayValveParameterization_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 IBPSA_latest_IBPSA_Fluid_Actuators_Valves_Validation_ThreeWayValveParameterization.fmu > IBPSA_latest_IBPSA.Fluid.Actuators.Valves.Validation.ThreeWayValveParameterization.pipe 2>&1)