Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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 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(Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation,fileNamePrefix="Buildings_8_Buildings_HeatTransfer_Windows_BaseClasses_Examples_TransmittedRadiation",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation,fileNamePrefix="Buildings_8_Buildings_HeatTransfer_Windows_BaseClasses_Examples_TransmittedRadiation",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 0.000838/0.0008381, allocations: 98.27 kB / 15.36 MB, free: 0.7344 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.004793/0.004793, allocations: 170.6 kB / 16.27 MB, free: 6.66 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.163/1.163, allocations: 205.4 MB / 222.4 MB, free: 5.559 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.522/1.522, allocations: 292.7 MB / 0.5502 GB, free: 14.46 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.0005079/0.0005079, allocations: 19.25 kB / 0.6744 GB, free: 25.8 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1868/0.1873, allocations: 116.3 MB / 0.788 GB, free: 11.48 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation): time 0.005896/0.1932, allocations: 5.023 MB / 0.7929 GB, free: 6.426 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.6096/0.8028, allocations: 150.5 MB / 0.9398 GB, free: 1.375 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008426/0.8037, allocations: 22.86 kB / 0.9399 GB, free: 1.367 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.00373/0.8074, allocations: 1.601 MB / 0.9414 GB, free: 1.117 MB / 0.7169 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/BoundaryConditions/WeatherData/BaseClasses/getHeaderElementTMY3.mo:2:1-105:25:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘ contains a call to impure function ‘Modelica.Utilities.Streams.readLine‘. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/BoundaryConditions/WeatherData/BaseClasses/getLongitudeTMY3.mo:2:1-48:21:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getLongitudeTMY3‘ contains a call to impure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/BoundaryConditions/WeatherData/BaseClasses/getLatitudeTMY3.mo:2:1-48:20:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getLatitudeTMY3‘ contains a call to impure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/BoundaryConditions/WeatherData/BaseClasses/getTimeZoneTMY3.mo:2:1-47:20:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getTimeZoneTMY3‘ contains a call to impure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘. Notification: Performance of NFTyping.typeBindings: time 0.001951/0.8094, allocations: 0.6133 MB / 0.942 GB, free: 0.9805 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.001936/0.8114, allocations: 0.786 MB / 0.9428 GB, free: 0.9141 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.002766/0.8141, allocations: 2.265 MB / 0.945 GB, free: 0.6719 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001244/0.8154, allocations: 0.9007 MB / 0.9459 GB, free: 472 kB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001237/0.8166, allocations: 0.5894 MB / 0.9465 GB, free: 424 kB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001097/0.8177, allocations: 0.6404 MB / 0.9471 GB, free: 412 kB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0001587/0.8179, allocations: 35.03 kB / 0.9471 GB, free: 412 kB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00408/0.822, allocations: 1.912 MB / 0.949 GB, free: 332 kB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.001047/0.8231, allocations: 1.017 MB / 0.95 GB, free: 324 kB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.00121/0.8243, allocations: 1.083 MB / 0.951 GB, free: 16.28 MB / 0.7325 GB Notification: Performance of NFConvertDAE.convert: time 0.0069/0.8312, allocations: 4.867 MB / 0.9558 GB, free: 15.77 MB / 0.7325 GB Notification: Performance of FrontEnd - DAE generated: time 3.446e-06/0.8312, allocations: 0 / 0.9558 GB, free: 15.77 MB / 0.7325 GB Notification: Performance of FrontEnd: time 2.384e-06/0.8312, allocations: 1.312 kB / 0.9558 GB, free: 15.77 MB / 0.7325 GB Notification: Performance of Transformations before backend: time 6.016e-05/0.8313, allocations: 0 / 0.9558 GB, free: 15.77 MB / 0.7325 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 300 * Number of variables: 300 Notification: Performance of Generate backend data structure: time 0.007919/0.8392, allocations: 3.126 MB / 0.9588 GB, free: 14.05 MB / 0.7325 GB Notification: Performance of prepare preOptimizeDAE: time 5.146e-05/0.8393, allocations: 9.938 kB / 0.9589 GB, free: 14.05 MB / 0.7325 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003087/0.8396, allocations: 177.7 kB / 0.959 GB, free: 13.98 MB / 0.7325 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001718/0.8413, allocations: 349.5 kB / 0.9594 GB, free: 13.81 MB / 0.7325 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.08228/0.9236, allocations: 87.55 MB / 1.045 GB, free: 15.03 MB / 0.795 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001068/0.9238, allocations: 98.36 kB / 1.045 GB, free: 14.93 MB / 0.795 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003901/0.9242, allocations: 124 kB / 1.045 GB, free: 14.81 MB / 0.795 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002973/0.9271, allocations: 1.252 MB / 1.046 GB, free: 13.5 MB / 0.795 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.457e-05/0.9272, allocations: 0 / 1.046 GB, free: 13.5 MB / 0.795 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001415/0.9273, allocations: 48 kB / 1.046 GB, free: 13.45 MB / 0.795 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.989e-05/0.9274, allocations: 28 kB / 1.046 GB, free: 13.42 MB / 0.795 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00267/0.93, allocations: 1.425 MB / 1.048 GB, free: 11.99 MB / 0.795 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.02437/0.9544, allocations: 23.14 MB / 1.07 GB, free: 4.801 MB / 0.8106 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002373/0.9569, allocations: 1.001 MB / 1.071 GB, free: 3.793 MB / 0.8106 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000804/0.9577, allocations: 411.7 kB / 1.072 GB, free: 3.391 MB / 0.8106 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001108/0.9578, allocations: 37.64 kB / 1.072 GB, free: 3.359 MB / 0.8106 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.00108/0.9589, allocations: 0.5553 MB / 1.072 GB, free: 2.785 MB / 0.8106 GB Notification: Performance of pre-optimization done (n=88): time 5.07e-06/0.9589, allocations: 4 kB / 1.072 GB, free: 2.781 MB / 0.8106 GB Notification: Performance of matching and sorting (n=88): time 0.004732/0.9637, allocations: 1.569 MB / 1.074 GB, free: 1.184 MB / 0.8106 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001034/0.9638, allocations: 196.9 kB / 1.074 GB, free: 0.9492 MB / 0.8106 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.1095/1.073, allocations: 99.34 MB / 1.171 GB, free: 13.57 MB / 0.92 GB Notification: Performance of collectPreVariables (initialization): time 0.0003386/1.074, allocations: 45.7 kB / 1.171 GB, free: 13.52 MB / 0.92 GB Notification: Performance of collectInitialEqns (initialization): time 0.001444/1.075, allocations: 1.02 MB / 1.172 GB, free: 12.5 MB / 0.92 GB Notification: Performance of collectInitialBindings (initialization): time 0.0004343/1.076, allocations: 296.9 kB / 1.172 GB, free: 12.21 MB / 0.92 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002298/1.076, allocations: 105.7 kB / 1.172 GB, free: 12.1 MB / 0.92 GB Notification: Performance of setup shared object (initialization): time 0.000127/1.076, allocations: 345.9 kB / 1.173 GB, free: 11.76 MB / 0.92 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000896/1.077, allocations: 449.8 kB / 1.173 GB, free: 11.32 MB / 0.92 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009448/1.078, allocations: 0.5821 MB / 1.174 GB, free: 10.7 MB / 0.92 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001632/1.08, allocations: 0.9311 MB / 1.175 GB, free: 9.754 MB / 0.92 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.043e-06/1.08, allocations: 7.938 kB / 1.175 GB, free: 9.746 MB / 0.92 GB Notification: Performance of matching and sorting (n=124) (initialization): time 0.003574/1.083, allocations: 1.398 MB / 1.176 GB, free: 8.332 MB / 0.92 GB Notification: Performance of prepare postOptimizeDAE: time 1.97e-05/1.083, allocations: 4 kB / 1.176 GB, free: 8.328 MB / 0.92 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.108e-05/1.083, allocations: 4 kB / 1.176 GB, free: 8.324 MB / 0.92 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005941/1.084, allocations: 84.8 kB / 1.176 GB, free: 8.238 MB / 0.92 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000906/1.085, allocations: 215.7 kB / 1.176 GB, free: 8.027 MB / 0.92 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002053/1.087, allocations: 1.521 MB / 1.178 GB, free: 6.371 MB / 0.92 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001917/1.089, allocations: 258.5 kB / 1.178 GB, free: 6.117 MB / 0.92 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001089/1.089, allocations: 43.98 kB / 1.178 GB, free: 6.074 MB / 0.92 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 6 (weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,$whenCondition1,$whenCondition2) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (122): * Single equations (assignments): 121 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,2)} Notification: Performance of prepare postOptimizeDAE: time 0.00149/1.09, allocations: 0.7932 MB / 1.179 GB, free: 5.273 MB / 0.92 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0008583/1.091, allocations: 213.3 kB / 1.179 GB, free: 5.062 MB / 0.92 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003419/1.095, allocations: 1.488 MB / 1.181 GB, free: 3.562 MB / 0.92 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.328e-06/1.095, allocations: 8 kB / 1.181 GB, free: 3.555 MB / 0.92 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.841e-06/1.095, allocations: 8 kB / 1.181 GB, free: 3.547 MB / 0.92 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.016e-05/1.095, allocations: 3.984 kB / 1.181 GB, free: 3.543 MB / 0.92 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006643/1.101, allocations: 3.521 MB / 1.184 GB, free: 15.98 MB / 0.9356 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.548e-06/1.101, allocations: 0 / 1.184 GB, free: 15.98 MB / 0.9356 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007035/1.102, allocations: 175.7 kB / 1.184 GB, free: 15.81 MB / 0.9356 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005361/1.103, allocations: 84.78 kB / 1.184 GB, free: 15.73 MB / 0.9356 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.36e-05/1.103, allocations: 31.91 kB / 1.184 GB, free: 15.7 MB / 0.9356 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001788/1.104, allocations: 1.554 MB / 1.186 GB, free: 14 MB / 0.9356 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.553e-06/1.104, allocations: 0 / 1.186 GB, free: 14 MB / 0.9356 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00284/1.107, allocations: 1.294 MB / 1.187 GB, free: 12.68 MB / 0.9356 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001662/1.109, allocations: 0.7514 MB / 1.188 GB, free: 11.91 MB / 0.9356 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0006643/1.11, allocations: 16 kB / 1.188 GB, free: 11.89 MB / 0.9356 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001449/1.111, allocations: 183.9 kB / 1.188 GB, free: 11.71 MB / 0.9356 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001509/1.111, allocations: 76.89 kB / 1.188 GB, free: 11.64 MB / 0.9356 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.013e-05/1.111, allocations: 39.98 kB / 1.188 GB, free: 11.6 MB / 0.9356 GB Notification: Performance of sorting global known variables: time 0.07751/1.189, allocations: 79.34 MB / 1.266 GB, free: 12.23 MB / 1.014 GB Notification: Performance of sort global known variables: time 6.42e-07/1.189, allocations: 0 / 1.266 GB, free: 12.23 MB / 1.014 GB Notification: Performance of remove unused functions: time 0.004003/1.193, allocations: 0.9401 MB / 1.267 GB, free: 11.29 MB / 1.014 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 4 ($whenCondition2,$whenCondition1,weaDat.conTimMin.tNext,weaDat.conTim.tNext) * Number of discrete states: 2 (weaDat.conTim.tNext,weaDat.conTimMin.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (102): * Single equations (assignments): 99 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.007007/1.2, allocations: 2.658 MB / 1.269 GB, free: 8.824 MB / 1.014 GB Notification: Performance of simCode: created initialization part: time 0.002371/1.202, allocations: 1.129 MB / 1.27 GB, free: 7.684 MB / 1.014 GB Notification: Performance of simCode: created event and clocks part: time 5.631e-06/1.202, allocations: 6.188 kB / 1.27 GB, free: 7.68 MB / 1.014 GB Notification: Performance of simCode: created simulation system equations: time 0.001074/1.203, allocations: 0.6212 MB / 1.271 GB, free: 7.047 MB / 1.014 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003574/1.207, allocations: 360.1 kB / 1.271 GB, free: 6.699 MB / 1.014 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.6945/1.902, allocations: 410.4 MB / 1.672 GB, free: 40.16 MB / 1.014 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00139/1.903, allocations: 1.687 MB / 1.674 GB, free: 38.46 MB / 1.014 GB Notification: Performance of simCode: alias equations: time 0.002197/1.905, allocations: 0.7567 MB / 1.674 GB, free: 37.8 MB / 1.014 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001751/1.907, allocations: 1.054 MB / 1.675 GB, free: 36.75 MB / 1.014 GB Notification: Performance of SimCode: time 5.41e-07/1.907, allocations: 0 / 1.675 GB, free: 36.75 MB / 1.014 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 3.983/5.89, allocations: 86.6 MB / 1.76 GB, free: 391.1 MB / 1.014 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001834/5.89, allocations: 299.3 kB / 1.76 GB, free: 390.7 MB / 1.014 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.223/9.113, allocations: 7.797 kB / 1.76 GB, free: 390.7 MB / 1.014 GB (rm -f Buildings_8_Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation.pipe ; mkfifo Buildings_8_Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation.pipe ; head -c 1048576 < Buildings_8_Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation.pipe >> ../files/Buildings_8_Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_Buildings_8_Buildings_HeatTransfer_Windows_BaseClasses_Examples_TransmittedRadiation_fmu --startTime=0 --stopTime=864000 --timeout=50 --tolerance=1e-06 Buildings_8_Buildings_HeatTransfer_Windows_BaseClasses_Examples_TransmittedRadiation.fmu > Buildings_8_Buildings.HeatTransfer.Windows.BaseClasses.Examples.TransmittedRadiation.pipe 2>&1)