Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/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 Buildings with version 8.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo) Running command: "" <> buildModelFMU(Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube,fileNamePrefix="Buildings_8_0_0_Buildings_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_Examples_BoreholeOneUTube",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube,fileNamePrefix="Buildings_8_0_0_Buildings_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_Examples_BoreholeOneUTube",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 2.527/2.527, allocations: 287.3 MB / 302.3 MB, free: 8.312 MB / 234.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.00154/0.001539, allocations: 199.6 kB / 370.8 MB, free: 10.84 MB / 298.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 2.097/2.097, allocations: 205.4 MB / 0.6295 GB, free: 10.65 MB / 458.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.00117/0.001169, allocations: 98.53 kB / 0.7428 GB, free: 6.648 MB / 0.5573 GB Notification: Performance of FrontEnd - loaded program: time 0.0005057/0.0005056, allocations: 15.89 kB / 0.8657 GB, free: 140.7 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2139/0.2145, allocations: 115.3 MB / 0.9783 GB, free: 28.29 MB / 0.6198 GB Notification: Performance of FrontEnd - scodeFlatten: time 1.316/1.531, allocations: 413.7 MB / 1.382 GB, free: 15.68 MB / 0.9167 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0004546/1.531, allocations: 117.7 kB / 1.382 GB, free: 15.61 MB / 0.9167 GB Notification: Performance of FrontEnd - DAE generated: time 15.6/17.13, allocations: 2.797 GB / 4.18 GB, free: 128 MB / 0.9792 GB Notification: Performance of FrontEnd: time 3.867e-06/17.13, allocations: 0 / 4.18 GB, free: 128 MB / 0.9792 GB Notification: Performance of Transformations before backend: time 0.003694/17.14, allocations: 309 kB / 4.18 GB, free: 127.9 MB / 0.9792 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2147 * Number of variables: 2147 Notification: Performance of Generate backend data structure: time 0.06517/17.2, allocations: 14.24 MB / 4.194 GB, free: 122.3 MB / 0.9792 GB Notification: Performance of prepare preOptimizeDAE: time 4.987e-05/17.2, allocations: 10.91 kB / 4.194 GB, free: 122.3 MB / 0.9792 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.006395/17.21, allocations: 1.151 MB / 4.195 GB, free: 122.2 MB / 0.9792 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01186/17.22, allocations: 1.626 MB / 4.197 GB, free: 121.4 MB / 0.9792 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.06695/17.29, allocations: 18.78 MB / 4.215 GB, free: 117.4 MB / 0.9792 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001053/17.29, allocations: 0.6378 MB / 4.216 GB, free: 117.1 MB / 0.9792 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.004564/17.29, allocations: 0.8637 MB / 4.217 GB, free: 116.8 MB / 0.9792 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.04413/17.34, allocations: 11.95 MB / 4.228 GB, free: 111.7 MB / 0.9792 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0006019/17.34, allocations: 31.03 kB / 4.228 GB, free: 111.7 MB / 0.9792 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.003469/17.34, allocations: 355.2 kB / 4.229 GB, free: 111.4 MB / 0.9792 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001918/17.34, allocations: 209.8 kB / 4.229 GB, free: 111.4 MB / 0.9792 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03437/17.38, allocations: 10.26 MB / 4.239 GB, free: 107.6 MB / 0.9792 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 0.1274/17.5, allocations: 51.43 MB / 4.289 GB, free: 58.47 MB / 0.9792 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01507/17.52, allocations: 5.845 MB / 4.295 GB, free: 52.6 MB / 0.9792 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002848/17.52, allocations: 2.18 MB / 4.297 GB, free: 49.98 MB / 0.9792 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0001091/17.52, allocations: 94.66 kB / 4.297 GB, free: 49.88 MB / 0.9792 GB Notification: Performance of pre-optimization done (n=482): time 7.915e-06/17.52, allocations: 0 / 4.297 GB, free: 49.88 MB / 0.9792 GB Notification: Performance of matching and sorting (n=482): time 0.03905/17.56, allocations: 12.57 MB / 4.309 GB, free: 36.85 MB / 0.9792 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.000154/17.56, allocations: 364.2 kB / 4.31 GB, free: 36.42 MB / 0.9792 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.04461/17.61, allocations: 14.73 MB / 4.324 GB, free: 21.76 MB / 0.9792 GB Notification: Performance of collectPreVariables (initialization): time 0.001923/17.61, allocations: 133.4 kB / 4.324 GB, free: 21.62 MB / 0.9792 GB Notification: Performance of collectInitialEqns (initialization): time 0.01177/17.62, allocations: 6.015 MB / 4.33 GB, free: 15.61 MB / 0.9792 GB Notification: Performance of collectInitialBindings (initialization): time 0.003676/17.62, allocations: 1.7 MB / 4.332 GB, free: 13.92 MB / 0.9792 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001298/17.63, allocations: 132 kB / 4.332 GB, free: 13.79 MB / 0.9792 GB Notification: Performance of setup shared object (initialization): time 0.0007612/17.63, allocations: 0.5749 MB / 4.332 GB, free: 13.21 MB / 0.9792 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.01017/17.64, allocations: 3.499 MB / 4.336 GB, free: 9.703 MB / 0.9792 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0132/17.65, allocations: 5.732 MB / 4.341 GB, free: 3.145 MB / 0.9792 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01349/17.66, allocations: 4.595 MB / 4.346 GB, free: 14.52 MB / 0.9948 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.18e-05/17.66, allocations: 12 kB / 4.346 GB, free: 14.5 MB / 0.9948 GB Notification: Performance of matching and sorting (n=847) (initialization): time 0.04032/17.7, allocations: 10.92 MB / 4.356 GB, free: 3.441 MB / 0.9948 GB Notification: Performance of prepare postOptimizeDAE: time 1.672/19.38, allocations: 25.4 MB / 4.381 GB, free: 119.2 MB / 0.9949 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0004334/19.38, allocations: 66.22 kB / 4.381 GB, free: 119.2 MB / 0.9949 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.004484/19.38, allocations: 1.024 MB / 4.382 GB, free: 119 MB / 0.9949 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01204/19.39, allocations: 1.448 MB / 4.384 GB, free: 119 MB / 0.9949 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.03897/19.43, allocations: 33.32 MB / 4.416 GB, free: 92.6 MB / 0.9949 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.02352/19.46, allocations: 1.523 MB / 4.418 GB, free: 92.6 MB / 0.9949 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.002368/19.46, allocations: 276.4 kB / 4.418 GB, free: 92.6 MB / 0.9949 GB Notification: Performance of prepare postOptimizeDAE: time 1.754e-05/19.46, allocations: 4 kB / 4.418 GB, free: 92.6 MB / 0.9949 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.03051/19.49, allocations: 9.831 MB / 4.428 GB, free: 92.24 MB / 0.9949 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0003736/19.49, allocations: 68.5 kB / 4.428 GB, free: 92.24 MB / 0.9949 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002989/19.49, allocations: 0.9868 MB / 4.429 GB, free: 92.08 MB / 0.9949 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01115/19.5, allocations: 1.452 MB / 4.43 GB, free: 92.08 MB / 0.9949 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.03162/19.54, allocations: 33.62 MB / 4.463 GB, free: 65.64 MB / 0.9949 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0293/19.56, allocations: 1.406 MB / 4.464 GB, free: 65.64 MB / 0.9949 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.002947/19.57, allocations: 279.6 kB / 4.465 GB, free: 65.64 MB / 0.9949 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 183 * 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 (757): * Single equations (assignments): 727 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 10 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 20 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 20 {(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3} * Non-linear torn systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.02408/19.59, allocations: 5.396 MB / 4.47 GB, free: 65.45 MB / 0.9949 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.007732/19.6, allocations: 1.163 MB / 4.471 GB, free: 65.34 MB / 0.9949 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.03498/19.63, allocations: 8.384 MB / 4.479 GB, free: 64.87 MB / 0.9949 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.694e-05/19.63, allocations: 49.58 kB / 4.479 GB, free: 64.87 MB / 0.9949 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5e-05/19.63, allocations: 11.12 kB / 4.479 GB, free: 64.87 MB / 0.9949 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.01974/19.65, allocations: 6.494 MB / 4.486 GB, free: 64.52 MB / 0.9949 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.09622/19.75, allocations: 44.13 MB / 4.529 GB, free: 57.75 MB / 1.011 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.621e-05/19.75, allocations: 11.72 kB / 4.529 GB, free: 57.75 MB / 1.011 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.009384/19.76, allocations: 1.064 MB / 4.53 GB, free: 57.75 MB / 1.011 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.003594/19.76, allocations: 0.9759 MB / 4.531 GB, free: 57.59 MB / 1.011 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.001354/19.77, allocations: 153 kB / 4.531 GB, free: 57.59 MB / 1.011 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.03966/19.8, allocations: 33.49 MB / 4.564 GB, free: 46.96 MB / 1.026 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.662e-05/19.81, allocations: 13.84 kB / 4.564 GB, free: 46.96 MB / 1.026 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.03786/19.84, allocations: 15.72 MB / 4.579 GB, free: 41.44 MB / 1.026 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0128/19.86, allocations: 2.949 MB / 4.582 GB, free: 40.71 MB / 1.026 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.006115/19.86, allocations: 133.2 kB / 4.582 GB, free: 40.71 MB / 1.026 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.01603/19.88, allocations: 0.6621 MB / 4.583 GB, free: 40.67 MB / 1.026 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001737/19.88, allocations: 354.4 kB / 4.583 GB, free: 40.66 MB / 1.026 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0009431/19.88, allocations: 193.1 kB / 4.583 GB, free: 40.66 MB / 1.026 GB Notification: Performance of sorting global known variables: time 0.03686/19.92, allocations: 12.07 MB / 4.595 GB, free: 40.3 MB / 1.026 GB Notification: Performance of sort global known variables: time 5.01e-07/19.92, allocations: 0.75 kB / 4.595 GB, free: 40.3 MB / 1.026 GB Notification: Performance of remove unused functions: time 0.03821/19.96, allocations: 6.522 MB / 4.601 GB, free: 40 MB / 1.026 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 45 * Number of states: 40 (borHol.intHex[1].vol1.dynBal.U,borHol.intHex[1].vol2.dynBal.U,borHol.intHex[1].intResUTub.capFil1.T,borHol.intHex[1].intResUTub.capFil2.T,borHol.intHex[2].vol1.dynBal.U,borHol.intHex[2].vol2.dynBal.U,borHol.intHex[2].intResUTub.capFil1.T,borHol.intHex[2].intResUTub.capFil2.T,borHol.intHex[3].vol1.dynBal.U,borHol.intHex[3].vol2.dynBal.U,borHol.intHex[3].intResUTub.capFil1.T,borHol.intHex[3].intResUTub.capFil2.T,borHol.intHex[4].vol1.dynBal.U,borHol.intHex[4].vol2.dynBal.U,borHol.intHex[4].intResUTub.capFil1.T,borHol.intHex[4].intResUTub.capFil2.T,borHol.intHex[5].vol1.dynBal.U,borHol.intHex[5].vol2.dynBal.U,borHol.intHex[5].intResUTub.capFil1.T,borHol.intHex[5].intResUTub.capFil2.T,borHol.intHex[6].vol1.dynBal.U,borHol.intHex[6].vol2.dynBal.U,borHol.intHex[6].intResUTub.capFil1.T,borHol.intHex[6].intResUTub.capFil2.T,borHol.intHex[7].vol1.dynBal.U,borHol.intHex[7].vol2.dynBal.U,borHol.intHex[7].intResUTub.capFil1.T,borHol.intHex[7].intResUTub.capFil2.T,borHol.intHex[8].vol1.dynBal.U,borHol.intHex[8].vol2.dynBal.U,borHol.intHex[8].intResUTub.capFil1.T,borHol.intHex[8].intResUTub.capFil2.T,borHol.intHex[9].vol1.dynBal.U,borHol.intHex[9].vol2.dynBal.U,borHol.intHex[9].intResUTub.capFil1.T,borHol.intHex[9].intResUTub.capFil2.T,borHol.intHex[10].vol1.dynBal.U,borHol.intHex[10].vol2.dynBal.U,borHol.intHex[10].intResUTub.capFil1.T,borHol.intHex[10].intResUTub.capFil2.T) * 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 (428): * Single equations (assignments): 402 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 20 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 20 {(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0411/20, allocations: 17.62 MB / 4.618 GB, free: 34.11 MB / 1.026 GB Notification: Performance of simCode: created initialization part: time 0.04565/20.04, allocations: 18.03 MB / 4.636 GB, free: 44.22 MB / 1.042 GB Notification: Performance of simCode: created event and clocks part: time 2.571e-05/20.04, allocations: 10.41 kB / 4.636 GB, free: 44.22 MB / 1.042 GB Notification: Performance of simCode: created simulation system equations: time 0.01279/20.06, allocations: 5.694 MB / 4.642 GB, free: 40.73 MB / 1.042 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.06599/20.12, allocations: 7.946 MB / 4.649 GB, free: 39.52 MB / 1.042 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.1267/20.25, allocations: 71.43 MB / 4.719 GB, free: 19.87 MB / 1.073 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.02236/20.27, allocations: 9.542 MB / 4.728 GB, free: 16.65 MB / 1.073 GB Notification: Performance of simCode: alias equations: time 0.03634/20.31, allocations: 6.742 MB / 4.735 GB, free: 16.2 MB / 1.073 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.01928/20.33, allocations: 5.615 MB / 4.74 GB, free: 11.76 MB / 1.073 GB Notification: Performance of SimCode: time 1.533e-06/20.33, allocations: 5.844 kB / 4.741 GB, free: 11.76 MB / 1.073 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 1.734/22.06, allocations: 398.4 MB / 5.13 GB, free: 11.7 MB / 1.089 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0004358/22.06, allocations: 291.5 kB / 5.13 GB, free: 11.34 MB / 1.089 GB Notification: Performance of buildModelFMU: Generate platform static: time 22.2/44.26, allocations: 0 / 5.13 GB, free: 11.34 MB / 1.089 GB (rm -f Buildings_8.0.0_Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube.pipe ; mkfifo Buildings_8.0.0_Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube.pipe >> ../files/Buildings_8.0.0_Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_8_0_0_Buildings_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_Examples_BoreholeOneUTube_fmu --startTime=0 --stopTime=360000 --timeout=50 --tolerance=1e-06 Buildings_8_0_0_Buildings_Fluid_Geothermal_Borefields_BaseClasses_Boreholes_Examples_BoreholeOneUTube.fmu > Buildings_8.0.0_Buildings.Fluid.Geothermal.Borefields.BaseClasses.Boreholes.Examples.BoreholeOneUTube.pipe 2>&1)