Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.conf.json 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/IDEAS 3.0.0-master/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/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/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 IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/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) Running command: translateModel(IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir") translateModel(IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.007491/0.007492, allocations: 171.8 kB / 15.11 MB, free: 5.973 MB / 13.93 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.7421/0.7421, allocations: 135.2 MB / 151.1 MB, free: 13.81 MB / 122.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.549/1.549, allocations: 223.2 MB / 406.9 MB, free: 3.207 MB / 330.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009147/0.0009149, allocations: 95.08 kB / 489.9 MB, free: 10.94 MB / 362.7 MB Notification: Performance of FrontEnd - loaded program: time 0.0003663/0.0003663, allocations: 11.94 kB / 0.5691 GB, free: 14.18 MB / 458.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.5811/0.5815, allocations: 82.29 MB / 0.6495 GB, free: 36.18 MB / 458.7 MB Notification: Performance of FrontEnd - scodeFlatten: time 5.314/5.896, allocations: 1.681 GB / 2.33 GB, free: 37.37 MB / 0.6823 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0002716/5.896, allocations: 89.03 kB / 2.33 GB, free: 37.29 MB / 0.6823 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$conAir$bacPro_internal is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$conAir$inlet$forward is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$conAirRevFlo$bacPro_internal is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$conAirRevFlo$inlet$forward is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$conAirRevFlo$inlet$backward is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$sou$outlet$forward is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$souRev$outlet$forward is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/MassFractionConnector.mo:2:1-41:11:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.MassFractionConnector is not balanced: The number of potential variables (1) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/FMI/Interfaces/FluidProperties.mo:2:1-72:20:writable] Warning: Connector .IDEAS.Fluid.FMI.Interfaces.FluidProperties$souRev$outlet$backward is not balanced: The number of potential variables (2) is not equal to the number of flow variables (0). Notification: Performance of FrontEnd - DAE generated: time 1.119/7.015, allocations: 291.9 MB / 2.615 GB, free: 15.49 MB / 0.6823 GB Notification: Performance of FrontEnd: time 3.897e-06/7.015, allocations: 0 / 2.615 GB, free: 15.49 MB / 0.6823 GB Notification: Performance of Transformations before backend: time 3.92e-05/7.015, allocations: 4 kB / 2.615 GB, free: 15.49 MB / 0.6823 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 49 * Number of variables: 49 Notification: Performance of Generate backend data structure: time 0.0007622/7.016, allocations: 443.1 kB / 2.616 GB, free: 15.01 MB / 0.6823 GB Notification: Performance of prepare preOptimizeDAE: time 6.676e-05/7.016, allocations: 16.03 kB / 2.616 GB, free: 14.99 MB / 0.6823 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001184/7.016, allocations: 27.67 kB / 2.616 GB, free: 14.96 MB / 0.6823 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004166/7.016, allocations: 247.2 kB / 2.616 GB, free: 14.68 MB / 0.6823 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.683e-05/7.017, allocations: 12.44 kB / 2.616 GB, free: 14.67 MB / 0.6823 GB Notification: Performance of preOpt expandDerOperator (simulation): time 2.729e-05/7.017, allocations: 20 kB / 2.616 GB, free: 14.65 MB / 0.6823 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004608/7.017, allocations: 255.3 kB / 2.616 GB, free: 14.36 MB / 0.6823 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.917e-05/7.017, allocations: 0 / 2.616 GB, free: 14.36 MB / 0.6823 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.501e-05/7.017, allocations: 11.94 kB / 2.616 GB, free: 14.34 MB / 0.6823 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.394e-05/7.017, allocations: 11.94 kB / 2.616 GB, free: 14.33 MB / 0.6823 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000184/7.017, allocations: 87.78 kB / 2.617 GB, free: 14.25 MB / 0.6823 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001121/7.018, allocations: 1.457 MB / 2.618 GB, free: 12.7 MB / 0.6823 GB Notification: Performance of preOpt comSubExp (simulation): time 8.503e-05/7.019, allocations: 169.1 kB / 2.618 GB, free: 12.53 MB / 0.6823 GB Notification: Performance of preOpt evalFunc (simulation): time 2.607e-05/7.019, allocations: 79.22 kB / 2.618 GB, free: 12.45 MB / 0.6823 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.513e-05/7.019, allocations: 105.8 kB / 2.618 GB, free: 12.34 MB / 0.6823 GB Notification: Performance of pre-optimization done (n=0): time 1.493e-06/7.019, allocations: 0 / 2.618 GB, free: 12.34 MB / 0.6823 GB Notification: Performance of matching and sorting (n=0): time 0.0001309/7.019, allocations: 53.47 kB / 2.618 GB, free: 12.28 MB / 0.6823 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.856e-05/7.019, allocations: 126.7 kB / 2.619 GB, free: 12.14 MB / 0.6823 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002782/7.019, allocations: 258.1 kB / 2.619 GB, free: 11.89 MB / 0.6823 GB Notification: Performance of collectPreVariables (initialization): time 9.247e-06/7.019, allocations: 25.7 kB / 2.619 GB, free: 11.86 MB / 0.6823 GB Notification: Performance of collectInitialEqns (initialization): time 9.882e-05/7.019, allocations: 147.9 kB / 2.619 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of collectInitialBindings (initialization): time 5.21e-06/7.019, allocations: 0 / 2.619 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of simplifyInitialFunctions (initialization): time 2.735e-06/7.019, allocations: 0 / 2.619 GB, free: 11.71 MB / 0.6823 GB Notification: Performance of setup shared object (initialization): time 0.000104/7.019, allocations: 330.8 kB / 2.619 GB, free: 11.38 MB / 0.6823 GB Notification: Performance of preBalanceInitialSystem (initialization): time 1.602e-05/7.019, allocations: 8.031 kB / 2.619 GB, free: 11.37 MB / 0.6823 GB Notification: Performance of partitionIndependentBlocks (initialization): time 2.731e-05/7.019, allocations: 39.36 kB / 2.619 GB, free: 11.32 MB / 0.6823 GB Notification: Performance of analyzeInitialSystem (initialization): time 3.17e-05/7.019, allocations: 4 kB / 2.619 GB, free: 11.31 MB / 0.6823 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.465e-06/7.019, allocations: 0 / 2.619 GB, free: 11.31 MB / 0.6823 GB Notification: Performance of matching and sorting (n=4) (initialization): time 0.0001593/7.02, allocations: 69.48 kB / 2.619 GB, free: 11.24 MB / 0.6823 GB Notification: Performance of prepare postOptimizeDAE: time 2.326e-05/7.02, allocations: 4 kB / 2.619 GB, free: 11.23 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.428e-06/7.02, allocations: 3.984 kB / 2.619 GB, free: 11.23 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (initialization): time 2e-05/7.02, allocations: 4 kB / 2.619 GB, free: 11.23 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 7.574e-05/7.02, allocations: 7.938 kB / 2.619 GB, free: 11.22 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.336e-05/7.02, allocations: 7.953 kB / 2.619 GB, free: 11.21 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 8.82e-05/7.02, allocations: 23.69 kB / 2.619 GB, free: 11.19 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.245e-06/7.02, allocations: 4 kB / 2.619 GB, free: 11.18 MB / 0.6823 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 4 * 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 (4): * Single equations (assignments): 4 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001502/7.02, allocations: 197.2 kB / 2.62 GB, free: 10.98 MB / 0.6823 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 8.279e-05/7.02, allocations: 124.7 kB / 2.62 GB, free: 10.85 MB / 0.6823 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 6.833e-05/7.02, allocations: 125.9 kB / 2.62 GB, free: 10.72 MB / 0.6823 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.669e-05/7.02, allocations: 180.2 kB / 2.62 GB, free: 10.54 MB / 0.6823 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.668e-05/7.02, allocations: 180.3 kB / 2.62 GB, free: 10.35 MB / 0.6823 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.456e-05/7.02, allocations: 192.2 kB / 2.62 GB, free: 10.16 MB / 0.6823 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0002942/7.021, allocations: 465.1 kB / 2.621 GB, free: 9.645 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.977e-05/7.021, allocations: 108.9 kB / 2.621 GB, free: 9.531 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 2.911e-05/7.021, allocations: 105 kB / 2.621 GB, free: 9.422 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.496e-05/7.021, allocations: 184.2 kB / 2.621 GB, free: 9.234 MB / 0.6823 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.375e-05/7.021, allocations: 180.3 kB / 2.621 GB, free: 9.051 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0001095/7.021, allocations: 176.3 kB / 2.622 GB, free: 8.871 MB / 0.6823 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.156e-05/7.021, allocations: 186.4 kB / 2.622 GB, free: 8.684 MB / 0.6823 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0001712/7.021, allocations: 339.4 kB / 2.622 GB, free: 8.328 MB / 0.6823 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001112/7.021, allocations: 193.9 kB / 2.622 GB, free: 8.113 MB / 0.6823 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 9.609e-05/7.022, allocations: 184.3 kB / 2.622 GB, free: 7.926 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001055/7.022, allocations: 108.9 kB / 2.622 GB, free: 7.812 MB / 0.6823 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.809e-05/7.022, allocations: 180.4 kB / 2.623 GB, free: 7.629 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.026e-05/7.022, allocations: 108.9 kB / 2.623 GB, free: 7.516 MB / 0.6823 GB Notification: Performance of sorting global known variables: time 0.0001753/7.022, allocations: 209.9 kB / 2.623 GB, free: 7.312 MB / 0.6823 GB Notification: Performance of sort global known variables: time 1.2e-07/7.022, allocations: 0 / 2.623 GB, free: 7.312 MB / 0.6823 GB Notification: Performance of remove unused functions: time 0.0009305/7.023, allocations: 128 kB / 2.623 GB, free: 7.188 MB / 0.6823 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 (0): * Single equations (assignments): 0 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.002556/7.025, allocations: 1.3 MB / 2.624 GB, free: 5.844 MB / 0.6823 GB Notification: Performance of simCode: created initialization part: time 0.0001238/7.026, allocations: 11.98 kB / 2.624 GB, free: 5.832 MB / 0.6823 GB Notification: Performance of simCode: created event and clocks part: time 5.19e-06/7.026, allocations: 3.938 kB / 2.624 GB, free: 5.828 MB / 0.6823 GB Notification: Performance of simCode: created simulation system equations: time 1.964e-06/7.026, allocations: 0 / 2.624 GB, free: 5.828 MB / 0.6823 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0008424/7.026, allocations: 0.6026 MB / 2.625 GB, free: 5.219 MB / 0.6823 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0007642/7.027, allocations: 394.4 kB / 2.625 GB, free: 4.805 MB / 0.6823 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002751/7.027, allocations: 0.7326 MB / 2.626 GB, free: 4.047 MB / 0.6823 GB Notification: Performance of simCode: alias equations: time 0.0001353/7.028, allocations: 21.94 kB / 2.626 GB, free: 4.023 MB / 0.6823 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 3.509e-05/7.028, allocations: 19.38 kB / 2.626 GB, free: 4.004 MB / 0.6823 GB Notification: Performance of SimCode: time 6.21e-07/7.028, allocations: 4 kB / 2.626 GB, free: 4 MB / 0.6823 GB Notification: Performance of Templates: time 0.4976/7.525, allocations: 18.66 MB / 2.644 GB, free: 181.9 MB / 0.6823 GB make -j1 -f IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.makefile (rm -f IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.sim & ./IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.FMI.Conversion.Validation.InletToAirMoistAir.pipe 2>&1)