Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.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.MixingVolumes.Validation.MixingVolumeInitialization,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_MixingVolumes_Validation_MixingVolumeInitialization",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_MixingVolumes_Validation_MixingVolumeInitialization",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 0.001137/0.001137, allocations: 100.1 kB / 15.88 MB, free: 12 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001164/0.001164, allocations: 206.6 kB / 16.79 MB, free: 6.84 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.196/1.196, allocations: 222.9 MB / 240.5 MB, free: 4.629 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.6136/0.6136, allocations: 115.3 MB / 405.9 MB, free: 2.793 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001135/0.001135, allocations: 65.11 kB / 493 MB, free: 6.746 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1187/0.1199, allocations: 76.18 MB / 0.5558 GB, free: 10.76 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization): time 0.3888/0.5087, allocations: 186.2 MB / 0.7377 GB, free: 12.71 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.01306/0.5218, allocations: 11.19 MB / 0.7486 GB, free: 1.488 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001084/0.5229, allocations: 43.69 kB / 0.7486 GB, free: 1.445 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.001142/0.5241, allocations: 429.8 kB / 0.749 GB, free: 1.023 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.004879/0.529, allocations: 2.424 MB / 0.7514 GB, free: 14.59 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.004142/0.5332, allocations: 2.069 MB / 0.7534 GB, free: 12.53 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.003491/0.5367, allocations: 3.996 MB / 0.7573 GB, free: 8.527 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0009346/0.5376, allocations: 0.6543 MB / 0.758 GB, free: 7.859 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001417/0.539, allocations: 0.8441 MB / 0.7588 GB, free: 7.012 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001843/0.5409, allocations: 1.073 MB / 0.7598 GB, free: 5.938 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0001883/0.5411, allocations: 52 kB / 0.7599 GB, free: 5.887 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00451/0.5456, allocations: 3.301 MB / 0.7631 GB, free: 2.578 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004539/0.5461, allocations: 386.8 kB / 0.7635 GB, free: 2.199 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.0006456/0.5467, allocations: 0.5403 MB / 0.764 GB, free: 1.656 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.003659/0.5504, allocations: 3.031 MB / 0.767 GB, free: 14.62 MB / 0.5919 GB Notification: Performance of FrontEnd - DAE generated: time 3.126e-06/0.5504, allocations: 4 kB / 0.767 GB, free: 14.61 MB / 0.5919 GB Notification: Performance of FrontEnd: time 8.61e-07/0.5504, allocations: 0 / 0.767 GB, free: 14.61 MB / 0.5919 GB Notification: Performance of Transformations before backend: time 2.091e-05/0.5504, allocations: 0 / 0.767 GB, free: 14.61 MB / 0.5919 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 173 * Number of variables: 173 Notification: Performance of Generate backend data structure: time 0.00316/0.5536, allocations: 1.663 MB / 0.7686 GB, free: 12.9 MB / 0.5919 GB Notification: Performance of prepare preOptimizeDAE: time 3.026e-05/0.5536, allocations: 8.031 kB / 0.7686 GB, free: 12.89 MB / 0.5919 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001417/0.5538, allocations: 118.5 kB / 0.7687 GB, free: 12.77 MB / 0.5919 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001726/0.5555, allocations: 298.3 kB / 0.769 GB, free: 12.47 MB / 0.5919 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001037/0.5566, allocations: 0.7765 MB / 0.7698 GB, free: 11.66 MB / 0.5919 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.517e-05/0.5566, allocations: 57.28 kB / 0.7698 GB, free: 11.6 MB / 0.5919 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001022/0.5567, allocations: 67.92 kB / 0.7699 GB, free: 11.53 MB / 0.5919 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00139/0.5581, allocations: 0.996 MB / 0.7708 GB, free: 10.52 MB / 0.5919 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.636e-05/0.5582, allocations: 0 / 0.7708 GB, free: 10.52 MB / 0.5919 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.89e-05/0.5582, allocations: 27.98 kB / 0.7709 GB, free: 10.49 MB / 0.5919 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.416e-05/0.5583, allocations: 77.95 kB / 0.7709 GB, free: 10.41 MB / 0.5919 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001487/0.5598, allocations: 1.011 MB / 0.7719 GB, free: 9.402 MB / 0.5919 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 0.004916/0.5647, allocations: 3.571 MB / 0.7754 GB, free: 5.598 MB / 0.5919 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0009651/0.5657, allocations: 0.657 MB / 0.7761 GB, free: 4.934 MB / 0.5919 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0004919/0.5662, allocations: 374.4 kB / 0.7764 GB, free: 4.566 MB / 0.5919 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002322/0.5665, allocations: 199.2 kB / 0.7766 GB, free: 4.336 MB / 0.5919 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.354e-05/0.5665, allocations: 43.06 kB / 0.7767 GB, free: 4.285 MB / 0.5919 GB Notification: Performance of pre-optimization done (n=62): time 1.623e-06/0.5665, allocations: 4 kB / 0.7767 GB, free: 4.281 MB / 0.5919 GB Notification: Performance of matching and sorting (n=62): time 0.001678/0.5682, allocations: 1.025 MB / 0.7777 GB, free: 3.254 MB / 0.5919 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.138e-05/0.5682, allocations: 107.4 kB / 0.7778 GB, free: 3.121 MB / 0.5919 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0008175/0.5691, allocations: 0.8058 MB / 0.7785 GB, free: 2.305 MB / 0.5919 GB Notification: Performance of collectPreVariables (initialization): time 5.11e-05/0.5691, allocations: 37.7 kB / 0.7786 GB, free: 2.262 MB / 0.5919 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002618/0.5694, allocations: 416.1 kB / 0.779 GB, free: 1.848 MB / 0.5919 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001568/0.5696, allocations: 224.8 kB / 0.7792 GB, free: 1.625 MB / 0.5919 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000211/0.5698, allocations: 142.6 kB / 0.7793 GB, free: 1.477 MB / 0.5919 GB Notification: Performance of setup shared object (initialization): time 9.591e-05/0.5699, allocations: 334 kB / 0.7796 GB, free: 1.145 MB / 0.5919 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005095/0.5704, allocations: 344.7 kB / 0.78 GB, free: 0.8047 MB / 0.5919 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005798/0.571, allocations: 470.2 kB / 0.7804 GB, free: 324 kB / 0.5919 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001037/0.572, allocations: 0.7666 MB / 0.7812 GB, free: 15.52 MB / 0.6075 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.736e-06/0.572, allocations: 0 / 0.7812 GB, free: 15.52 MB / 0.6075 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.00133/0.5734, allocations: 0.9295 MB / 0.7821 GB, free: 14.58 MB / 0.6075 GB Notification: Performance of prepare postOptimizeDAE: time 1.25e-05/0.5734, allocations: 8.281 kB / 0.7821 GB, free: 14.57 MB / 0.6075 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.231e-06/0.5734, allocations: 4 kB / 0.7821 GB, free: 14.57 MB / 0.6075 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.321e-05/0.5734, allocations: 4 kB / 0.7821 GB, free: 14.56 MB / 0.6075 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006341/0.5741, allocations: 159.7 kB / 0.7822 GB, free: 14.41 MB / 0.6075 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.548e-06/0.5741, allocations: 4 kB / 0.7823 GB, free: 14.4 MB / 0.6075 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007284/0.5748, allocations: 115.1 kB / 0.7824 GB, free: 14.29 MB / 0.6075 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.748e-05/0.5749, allocations: 24 kB / 0.7824 GB, free: 14.27 MB / 0.6075 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007081/0.5756, allocations: 0.537 MB / 0.7829 GB, free: 13.73 MB / 0.6075 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005471/0.5761, allocations: 454.4 kB / 0.7833 GB, free: 13.24 MB / 0.6075 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009427/0.5771, allocations: 0.7293 MB / 0.7841 GB, free: 12.47 MB / 0.6075 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.923e-06/0.5771, allocations: 0 / 0.7841 GB, free: 12.47 MB / 0.6075 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.001246/0.5784, allocations: 0.8903 MB / 0.7849 GB, free: 11.57 MB / 0.6075 GB Notification: Performance of prepare postOptimizeDAE: time 8.546e-06/0.5784, allocations: 8 kB / 0.7849 GB, free: 11.57 MB / 0.6075 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.062e-06/0.5784, allocations: 8 kB / 0.7849 GB, free: 11.56 MB / 0.6075 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.27e-06/0.5784, allocations: 4.094 kB / 0.7849 GB, free: 11.55 MB / 0.6075 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006105/0.579, allocations: 159.7 kB / 0.7851 GB, free: 11.4 MB / 0.6075 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 8.897e-06/0.579, allocations: 11.98 kB / 0.7851 GB, free: 11.39 MB / 0.6075 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006981/0.5797, allocations: 87.77 kB / 0.7852 GB, free: 11.3 MB / 0.6075 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.333e-05/0.5798, allocations: 29.08 kB / 0.7852 GB, free: 11.27 MB / 0.6075 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 10 * 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 (88): * Single equations (assignments): 88 * 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 0.0001575/0.58, allocations: 225.5 kB / 0.7854 GB, free: 11.05 MB / 0.6075 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000134/0.5801, allocations: 94.88 kB / 0.7855 GB, free: 10.95 MB / 0.6075 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001205/0.5813, allocations: 0.8102 MB / 0.7863 GB, free: 10.15 MB / 0.6075 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.222e-06/0.5813, allocations: 4 kB / 0.7863 GB, free: 10.14 MB / 0.6075 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.907e-06/0.5813, allocations: 0 / 0.7863 GB, free: 10.14 MB / 0.6075 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.000931/0.5823, allocations: 0.7439 MB / 0.787 GB, free: 9.371 MB / 0.6075 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002621/0.5849, allocations: 2.09 MB / 0.7891 GB, free: 7.184 MB / 0.6075 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.651e-06/0.5849, allocations: 7.938 kB / 0.7891 GB, free: 7.176 MB / 0.6075 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005976/0.5855, allocations: 131.8 kB / 0.7892 GB, free: 7.047 MB / 0.6075 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.58e-06/0.5855, allocations: 4 kB / 0.7892 GB, free: 7.043 MB / 0.6075 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.562e-05/0.5856, allocations: 20 kB / 0.7892 GB, free: 7.023 MB / 0.6075 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 7.905e-06/0.5856, allocations: 11.92 kB / 0.7893 GB, free: 7.012 MB / 0.6075 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.846e-06/0.5856, allocations: 4 kB / 0.7893 GB, free: 7.008 MB / 0.6075 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001638/0.5872, allocations: 1.356 MB / 0.7906 GB, free: 5.59 MB / 0.6075 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003074/0.5876, allocations: 255.8 kB / 0.7908 GB, free: 5.32 MB / 0.6075 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001144/0.5877, allocations: 19.94 kB / 0.7908 GB, free: 5.301 MB / 0.6075 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005793/0.5883, allocations: 55.8 kB / 0.7909 GB, free: 5.246 MB / 0.6075 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.982e-05/0.5884, allocations: 48.27 kB / 0.7909 GB, free: 5.199 MB / 0.6075 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.319e-05/0.5884, allocations: 27.98 kB / 0.791 GB, free: 5.172 MB / 0.6075 GB Notification: Performance of sorting global known variables: time 0.0005728/0.589, allocations: 0.5537 MB / 0.7915 GB, free: 4.621 MB / 0.6075 GB Notification: Performance of sort global known variables: time 1.4e-07/0.589, allocations: 0 / 0.7915 GB, free: 4.621 MB / 0.6075 GB Notification: Performance of remove unused functions: time 0.001366/0.5904, allocations: 0.7489 MB / 0.7922 GB, free: 3.871 MB / 0.6075 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 3 (vol1.dynBal.medium.Xi[1],vol1.dynBal.U,vol1.dynBal.m) * 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 (64): * Single equations (assignments): 64 * 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 Backend phase and start with SimCode phase: time 0.00275/0.5931, allocations: 2.351 MB / 0.7945 GB, free: 1.469 MB / 0.6075 GB Notification: Performance of simCode: created initialization part: time 0.001605/0.5947, allocations: 1.17 MB / 0.7957 GB, free: 308 kB / 0.6075 GB Notification: Performance of simCode: created event and clocks part: time 2.534e-06/0.5947, allocations: 1.125 kB / 0.7957 GB, free: 308 kB / 0.6075 GB Notification: Performance of simCode: created simulation system equations: time 0.0004886/0.5952, allocations: 378.4 kB / 0.796 GB, free: 15.92 MB / 0.6231 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002063/0.5973, allocations: 0.5082 MB / 0.7965 GB, free: 15.42 MB / 0.6231 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00985/0.6072, allocations: 8.534 MB / 0.8049 GB, free: 6.559 MB / 0.6231 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005333/0.6077, allocations: 1.081 MB / 0.8059 GB, free: 5.449 MB / 0.6231 GB Notification: Performance of simCode: alias equations: time 0.001115/0.6088, allocations: 418 kB / 0.8063 GB, free: 5.039 MB / 0.6231 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000429/0.6093, allocations: 331.3 kB / 0.8066 GB, free: 4.715 MB / 0.6231 GB Notification: Performance of SimCode: time 2.51e-07/0.6093, allocations: 0 / 0.8066 GB, free: 4.715 MB / 0.6231 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 4.255/4.864, allocations: 30.22 MB / 0.8362 GB, free: 231.2 MB / 0.6387 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002198/4.864, allocations: 255.7 kB / 0.8364 GB, free: 231 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.126/7.991, allocations: 2.25 kB / 0.8364 GB, free: 231 MB / 0.6387 GB (rm -f IBPSA_latest_IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IBPSA_latest_IBPSA_Fluid_MixingVolumes_Validation_MixingVolumeInitialization_fmu --startTime=0 --stopTime=0.001 --timeout=50 --tolerance=1e-06 IBPSA_latest_IBPSA_Fluid_MixingVolumes_Validation_MixingVolumeInitialization.fmu > IBPSA_latest_IBPSA.Fluid.MixingVolumes.Validation.MixingVolumeInitialization.pipe 2>&1)