Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition.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/Buildings 9.1.3-maint.9.1.x/package.mo", uses=false) Using package Buildings with version 9.1.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/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(Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition,fileNamePrefix="Buildings_9_Buildings_Fluid_Geothermal_Boreholes_BaseClasses_Examples_SingleUTubeBoundaryCondition",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition,fileNamePrefix="Buildings_9_Buildings_Fluid_Geothermal_Boreholes_BaseClasses_Examples_SingleUTubeBoundaryCondition",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 0.001078/0.001078, allocations: 108 kB / 15.6 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001119/0.001119, allocations: 199.2 kB / 16.54 MB, free: 6.672 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.368/1.368, allocations: 222.9 MB / 240.2 MB, free: 4.402 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo): time 2.418/2.418, allocations: 390.3 MB / 0.6647 GB, free: 312 kB / 0.5137 GB Notification: Performance of FrontEnd - loaded program: time 0.001479/0.001479, allocations: 75.88 kB / 0.8127 GB, free: 14.15 MB / 0.67 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.6516/0.6531, allocations: 140.4 MB / 0.9497 GB, free: 9.145 MB / 0.7169 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition): time 0.003499/0.6567, allocations: 2.34 MB / 0.952 GB, free: 7.305 MB / 0.7169 GB Notification: Performance of NFInst.instExpressions: time 0.001251/0.658, allocations: 1.004 MB / 0.953 GB, free: 6.5 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001084/0.6581, allocations: 10.66 kB / 0.953 GB, free: 6.492 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.0002092/0.6583, allocations: 47.03 kB / 0.9531 GB, free: 6.457 MB / 0.7169 GB Notification: Performance of NFTyping.typeBindings: time 0.0001515/0.6585, allocations: 83.47 kB / 0.9531 GB, free: 6.383 MB / 0.7169 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/Fluid/Geothermal/Boreholes/BaseClasses/temperatureDrop.mo:2:1-109:20:writable] Warning: Pure function 'Buildings.Fluid.Geothermal.Boreholes.BaseClasses.temperatureDrop' contains a call to impure function 'Buildings.Fluid.Geothermal.Boreholes.BaseClasses.exchangeValues'. Notification: Performance of NFTyping.typeClassSections: time 0.000519/0.659, allocations: 162.7 kB / 0.9533 GB, free: 6.266 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.0002284/0.6593, allocations: 284.5 kB / 0.9536 GB, free: 6.102 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0001145/0.6594, allocations: 52.34 kB / 0.9536 GB, free: 6.066 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001357/0.6595, allocations: 106.3 kB / 0.9537 GB, free: 6.008 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001213/0.6596, allocations: 109 kB / 0.9538 GB, free: 5.938 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 3.847e-05/0.6597, allocations: 16.53 kB / 0.9538 GB, free: 5.938 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0002689/0.66, allocations: 117.5 kB / 0.9539 GB, free: 5.883 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 4.536e-05/0.66, allocations: 43.75 kB / 0.954 GB, free: 5.848 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.0001225/0.6601, allocations: 117.6 kB / 0.9541 GB, free: 5.77 MB / 0.7169 GB Notification: Performance of NFConvertDAE.convert: time 0.0003632/0.6605, allocations: 317.2 kB / 0.9544 GB, free: 5.555 MB / 0.7169 GB Notification: Performance of FrontEnd - DAE generated: time 3.437e-06/0.6605, allocations: 0.875 kB / 0.9544 GB, free: 5.555 MB / 0.7169 GB Notification: Performance of FrontEnd: time 1.112e-06/0.6605, allocations: 4 kB / 0.9544 GB, free: 5.551 MB / 0.7169 GB Notification: Performance of Transformations before backend: time 1.156e-05/0.6605, allocations: 1.469 kB / 0.9544 GB, free: 5.551 MB / 0.7169 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 27 * Number of variables: 27 Notification: Performance of Generate backend data structure: time 0.0009016/0.6615, allocations: 0.5841 MB / 0.955 GB, free: 5.004 MB / 0.7169 GB Notification: Performance of prepare preOptimizeDAE: time 4.705e-05/0.6615, allocations: 9.656 kB / 0.955 GB, free: 5.004 MB / 0.7169 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 4.418e-05/0.6616, allocations: 50.61 kB / 0.955 GB, free: 4.949 MB / 0.7169 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 6.751e-05/0.6616, allocations: 30.88 kB / 0.9551 GB, free: 4.934 MB / 0.7169 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004852/0.6621, allocations: 291.7 kB / 0.9553 GB, free: 4.648 MB / 0.7169 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.936e-05/0.6622, allocations: 16.84 kB / 0.9554 GB, free: 4.641 MB / 0.7169 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.789e-05/0.6623, allocations: 22.22 kB / 0.9554 GB, free: 4.633 MB / 0.7169 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0003774/0.6626, allocations: 207.5 kB / 0.9556 GB, free: 4.469 MB / 0.7169 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.443e-05/0.6627, allocations: 1.25 kB / 0.9556 GB, free: 4.469 MB / 0.7169 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.184e-05/0.6627, allocations: 5.125 kB / 0.9556 GB, free: 4.465 MB / 0.7169 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.874e-06/0.6627, allocations: 7.594 kB / 0.9556 GB, free: 4.461 MB / 0.7169 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003436/0.663, allocations: 112.8 kB / 0.9557 GB, free: 4.406 MB / 0.7169 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.000797/0.6639, allocations: 0.865 MB / 0.9565 GB, free: 3.555 MB / 0.7169 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0004423/0.6643, allocations: 205.2 kB / 0.9567 GB, free: 3.414 MB / 0.7169 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001849/0.6645, allocations: 76.31 kB / 0.9568 GB, free: 3.363 MB / 0.7169 GB Notification: Performance of preOpt evalFunc (simulation): time 1.197e-05/0.6645, allocations: 3.031 kB / 0.9568 GB, free: 3.363 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004036/0.6649, allocations: 204.3 kB / 0.957 GB, free: 3.207 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=23): time 1.493e-06/0.6649, allocations: 0 / 0.957 GB, free: 3.207 MB / 0.7169 GB Notification: Performance of matching and sorting (n=23): time 0.0009458/0.6659, allocations: 355.6 kB / 0.9573 GB, free: 3.039 MB / 0.7169 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.149e-05/0.6659, allocations: 119 kB / 0.9575 GB, free: 2.906 MB / 0.7169 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001816/0.6661, allocations: 245.9 kB / 0.9577 GB, free: 2.73 MB / 0.7169 GB Notification: Performance of collectPreVariables (initialization): time 2.396e-05/0.6662, allocations: 39.2 kB / 0.9577 GB, free: 2.691 MB / 0.7169 GB Notification: Performance of collectInitialEqns (initialization): time 6.58e-05/0.6662, allocations: 142.1 kB / 0.9579 GB, free: 2.559 MB / 0.7169 GB Notification: Performance of collectInitialBindings (initialization): time 4.103e-05/0.6663, allocations: 64.88 kB / 0.9579 GB, free: 2.504 MB / 0.7169 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.26e-05/0.6664, allocations: 74.94 kB / 0.958 GB, free: 2.449 MB / 0.7169 GB Notification: Performance of setup shared object (initialization): time 5.861e-05/0.6664, allocations: 341.7 kB / 0.9583 GB, free: 2.113 MB / 0.7169 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002085/0.6666, allocations: 72.61 kB / 0.9584 GB, free: 2.086 MB / 0.7169 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002674/0.6669, allocations: 267.5 kB / 0.9586 GB, free: 1.805 MB / 0.7169 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004797/0.6674, allocations: 389.8 kB / 0.959 GB, free: 1.441 MB / 0.7169 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.659e-06/0.6674, allocations: 2.312 kB / 0.959 GB, free: 1.441 MB / 0.7169 GB Notification: Performance of matching and sorting (n=47) (initialization): time 0.0006712/0.6681, allocations: 404.4 kB / 0.9594 GB, free: 1.215 MB / 0.7169 GB Notification: Performance of prepare postOptimizeDAE: time 7.835e-05/0.6682, allocations: 33.95 kB / 0.9594 GB, free: 1.184 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.838e-05/0.6683, allocations: 10.55 kB / 0.9595 GB, free: 1.18 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.062e-05/0.6683, allocations: 8.031 kB / 0.9595 GB, free: 1.18 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002547/0.6686, allocations: 67.38 kB / 0.9595 GB, free: 1.16 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.6e-05/0.6686, allocations: 16.34 kB / 0.9595 GB, free: 1.152 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002298/0.6689, allocations: 44.77 kB / 0.9596 GB, free: 1.125 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.016e-05/0.6689, allocations: 19.97 kB / 0.9596 GB, free: 1.121 MB / 0.7169 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 27 * Number of states: 0 () * Number of discrete variables: 32 (TBouSte.QAve_flow,$PRE.TBouSte.QAve_flow,TBouSte.UOld,$PRE.TBouSte.UOld,TBouSte.port.T,$PRE.TBouSte.port.T,TBouSte.iSam,$PRE.TBouSte.iSam,$whenCondition4,TBouCon.QAve_flow,$PRE.TBouCon.QAve_flow,TBouCon.UOld,$PRE.TBouCon.UOld,TBouCon.port.T,$PRE.TBouCon.port.T,TBouCon.iSam,$PRE.TBouCon.iSam,$whenCondition3,TBouPul.QAve_flow,$PRE.TBouPul.QAve_flow,TBouPul.UOld,$PRE.TBouPul.UOld,TBouPul.port.T,$PRE.TBouPul.port.T,TBouPul.iSam,$PRE.TBouPul.iSam,$whenCondition1,pulse.count,$PRE.pulse.count,pulse.T_start,$PRE.pulse.T_start,$whenCondition2) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (46): * Single equations (assignments): 45 * Array equations: 0 * Algorithm blocks: 1 * 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 0.0001129/0.669, allocations: 168 kB / 0.9598 GB, free: 0.9688 MB / 0.7169 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.033e-05/0.6691, allocations: 24.47 kB / 0.9598 GB, free: 0.957 MB / 0.7169 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 4.722e-05/0.6691, allocations: 27.98 kB / 0.9598 GB, free: 0.9375 MB / 0.7169 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.22e-06/0.6691, allocations: 3.531 kB / 0.9598 GB, free: 0.9375 MB / 0.7169 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.116e-06/0.6691, allocations: 5.031 kB / 0.9598 GB, free: 0.9336 MB / 0.7169 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.31e-06/0.6691, allocations: 1.188 kB / 0.9598 GB, free: 0.9336 MB / 0.7169 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0002081/0.6693, allocations: 262 kB / 0.9601 GB, free: 0.668 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.325e-06/0.6694, allocations: 8.938 kB / 0.9601 GB, free: 0.6602 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001189/0.6695, allocations: 21.69 kB / 0.9601 GB, free: 0.6523 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.885e-06/0.6695, allocations: 0.875 kB / 0.9601 GB, free: 0.6523 MB / 0.7169 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.139e-05/0.6695, allocations: 8.062 kB / 0.9601 GB, free: 0.6484 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 3.146e-06/0.6695, allocations: 6.016 kB / 0.9601 GB, free: 0.6445 MB / 0.7169 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.385e-06/0.6695, allocations: 5.031 kB / 0.9601 GB, free: 0.6406 MB / 0.7169 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0008014/0.6703, allocations: 406.8 kB / 0.9605 GB, free: 424 kB / 0.7169 GB Notification: Performance of postOpt removeConstants (simulation): time 3.943e-05/0.6704, allocations: 103.4 kB / 0.9606 GB, free: 308 kB / 0.7169 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 4.687e-05/0.6704, allocations: 8.219 kB / 0.9606 GB, free: 304 kB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001591/0.6706, allocations: 20.12 kB / 0.9606 GB, free: 292 kB / 0.7169 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.056e-05/0.6707, allocations: 22.14 kB / 0.9607 GB, free: 280 kB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.051e-05/0.6707, allocations: 15.83 kB / 0.9607 GB, free: 272 kB / 0.7169 GB Notification: Performance of sorting global known variables: time 0.0001144/0.6708, allocations: 166.6 kB / 0.9608 GB, free: 144 kB / 0.7169 GB Notification: Performance of sort global known variables: time 1.5e-07/0.6708, allocations: 1.188 kB / 0.9608 GB, free: 144 kB / 0.7169 GB Notification: Performance of remove unused functions: time 0.0003918/0.6712, allocations: 87.67 kB / 0.9609 GB, free: 120 kB / 0.7169 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 3 (TBouSte.U,TBouCon.U,TBouPul.U) * Number of discrete variables: 18 ($whenCondition4,TBouSte.QAve_flow,TBouSte.port.T,TBouSte.UOld,TBouSte.iSam,$whenCondition3,TBouCon.QAve_flow,TBouCon.port.T,TBouCon.UOld,TBouCon.iSam,$whenCondition2,$whenCondition1,TBouPul.QAve_flow,TBouPul.port.T,TBouPul.UOld,TBouPul.iSam,pulse.T_start,pulse.count) * Number of discrete states: 7 (TBouPul.iSam,TBouPul.UOld,pulse.count,TBouCon.iSam,TBouCon.UOld,TBouSte.iSam,TBouSte.UOld) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (23): * Single equations (assignments): 9 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 14 * 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 0.001491/0.6727, allocations: 1.021 MB / 0.9619 GB, free: 15.32 MB / 0.7325 GB Notification: Performance of simCode: created initialization part: time 0.0005998/0.6733, allocations: 298.1 kB / 0.9622 GB, free: 15.15 MB / 0.7325 GB Notification: Performance of simCode: created event and clocks part: time 2.855e-06/0.6734, allocations: 1.094 kB / 0.9622 GB, free: 15.15 MB / 0.7325 GB Notification: Performance of simCode: created simulation system equations: time 0.0002707/0.6736, allocations: 112.3 kB / 0.9623 GB, free: 15.1 MB / 0.7325 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0003805/0.674, allocations: 60.12 kB / 0.9624 GB, free: 15.07 MB / 0.7325 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004611/0.6786, allocations: 3.017 MB / 0.9653 GB, free: 12.58 MB / 0.7325 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003797/0.679, allocations: 0.741 MB / 0.966 GB, free: 11.86 MB / 0.7325 GB Notification: Performance of simCode: alias equations: time 0.0002159/0.6793, allocations: 53.42 kB / 0.9661 GB, free: 11.84 MB / 0.7325 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002351/0.6795, allocations: 76.25 kB / 0.9662 GB, free: 11.78 MB / 0.7325 GB Notification: Performance of SimCode: time 2.2e-07/0.6795, allocations: 0 / 0.9662 GB, free: 11.78 MB / 0.7325 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03171/0.7112, allocations: 6.447 MB / 0.9724 GB, free: 8.668 MB / 0.7325 GB Notification: Performance of buildModelFMU: Generate platform static: time 7.738/8.45, allocations: 6.328 kB / 0.9725 GB, free: 8.668 MB / 0.7325 GB (rm -f Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition.pipe ; mkfifo Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition.pipe ; head -c 1048576 < Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition.pipe >> ../files/Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition_res.mat --tempDir=temp_Buildings_9_Buildings_Fluid_Geothermal_Boreholes_BaseClasses_Examples_SingleUTubeBoundaryCondition_fmu --startTime=0 --stopTime=1.5768e+08 --timeout=50 --tolerance=1e-06 Buildings_9_Buildings_Fluid_Geothermal_Boreholes_BaseClasses_Examples_SingleUTubeBoundaryCondition.fmu > Buildings_9_Buildings.Fluid.Geothermal.Boreholes.BaseClasses.Examples.SingleUTubeBoundaryCondition.pipe 2>&1)