Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.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/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-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: translateModel(BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater") translateModel(BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.006735/0.006736, allocations: 102.1 kB / 15.73 MB, free: 6.012 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001307/0.001307, allocations: 196.6 kB / 16.67 MB, free: 5.938 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.363/1.363, allocations: 222.9 MB / 240.4 MB, free: 4.043 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002043/0.002043, allocations: 283 kB / 290.8 MB, free: 1.637 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.94/0.94, allocations: 169.3 MB / 0.4983 GB, free: 13.8 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001759/0.001759, allocations: 104.1 kB / 0.6814 GB, free: 15.46 MB / 494.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1576/0.1594, allocations: 86.98 MB / 0.7664 GB, free: 8.402 MB / 0.5606 GB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater): time 0.3929/0.5523, allocations: 26.25 MB / 0.792 GB, free: 204 kB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.01245/0.5648, allocations: 7.14 MB / 0.799 GB, free: 11.12 MB / 0.5762 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.00214/0.567, allocations: 40.03 kB / 0.799 GB, free: 11.11 MB / 0.5762 GB Notification: Performance of NFTyping.typeComponents: time 0.001313/0.5684, allocations: 383 kB / 0.7994 GB, free: 10.88 MB / 0.5762 GB Notification: Performance of NFTyping.typeBindings: time 0.004003/0.5724, allocations: 1.109 MB / 0.8005 GB, free: 10.23 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.003184/0.5756, allocations: 0.9608 MB / 0.8014 GB, free: 9.727 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.003587/0.5792, allocations: 2.09 MB / 0.8035 GB, free: 8.746 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001244/0.5805, allocations: 0.622 MB / 0.8041 GB, free: 8.477 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002407/0.5829, allocations: 0.7383 MB / 0.8048 GB, free: 8.152 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001272/0.5842, allocations: 0.5427 MB / 0.8053 GB, free: 7.902 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.000236/0.5844, allocations: 58.06 kB / 0.8054 GB, free: 7.898 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002695/0.5871, allocations: 0.8092 MB / 0.8062 GB, free: 7.613 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004467/0.5876, allocations: 169.3 kB / 0.8063 GB, free: 7.516 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.001252/0.5888, allocations: 385.8 kB / 0.8067 GB, free: 7.289 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.003927/0.5928, allocations: 1.21 MB / 0.8079 GB, free: 6.844 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 6.633e-06/0.5928, allocations: 0 / 0.8079 GB, free: 6.844 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.583e-06/0.5928, allocations: 0 / 0.8079 GB, free: 6.844 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 6.127e-05/0.5929, allocations: 0 / 0.8079 GB, free: 6.844 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 110 * Number of variables: 110 Notification: Performance of Generate backend data structure: time 0.003276/0.5962, allocations: 1.055 MB / 0.8089 GB, free: 6.066 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 4.221e-05/0.5962, allocations: 9.75 kB / 0.8089 GB, free: 6.066 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007339/0.597, allocations: 86.98 kB / 0.809 GB, free: 6.027 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001991/0.599, allocations: 0.7471 MB / 0.8097 GB, free: 5.559 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.824e-05/0.599, allocations: 35.12 kB / 0.8098 GB, free: 5.539 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001788/0.5992, allocations: 47.45 kB / 0.8098 GB, free: 5.523 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001376/0.6006, allocations: 0.5023 MB / 0.8103 GB, free: 5.262 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.3e-05/0.6006, allocations: 3.578 kB / 0.8103 GB, free: 5.262 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.677e-05/0.6007, allocations: 22.98 kB / 0.8103 GB, free: 5.246 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.136e-05/0.6008, allocations: 14 kB / 0.8103 GB, free: 5.246 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000724/0.6015, allocations: 318.1 kB / 0.8106 GB, free: 5.133 MB / 0.5762 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 0.003882/0.6054, allocations: 2.749 MB / 0.8133 GB, free: 2.875 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0003537/0.6058, allocations: 198.5 kB / 0.8135 GB, free: 2.785 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001528/0.6059, allocations: 97.5 kB / 0.8136 GB, free: 2.746 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003302/0.6063, allocations: 340.2 kB / 0.8139 GB, free: 2.367 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.539e-05/0.6063, allocations: 37.52 kB / 0.814 GB, free: 2.324 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=22): time 3.186e-06/0.6063, allocations: 0 / 0.814 GB, free: 2.324 MB / 0.5762 GB Notification: Performance of matching and sorting (n=22): time 0.0006979/0.607, allocations: 310.4 kB / 0.8143 GB, free: 2.188 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.334e-05/0.6071, allocations: 57.91 kB / 0.8143 GB, free: 2.121 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007592/0.6078, allocations: 0.5292 MB / 0.8148 GB, free: 1.871 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 5.158e-05/0.6079, allocations: 31.83 kB / 0.8149 GB, free: 1.836 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002723/0.6082, allocations: 344.9 kB / 0.8152 GB, free: 1.562 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 9.573e-05/0.6083, allocations: 80.64 kB / 0.8153 GB, free: 1.5 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001285/0.6084, allocations: 83.84 kB / 0.8153 GB, free: 1.449 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 0.0001709/0.6086, allocations: 366.9 kB / 0.8157 GB, free: 1.109 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001721/0.6088, allocations: 95.8 kB / 0.8158 GB, free: 1.07 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002803/0.6091, allocations: 241.9 kB / 0.816 GB, free: 0.8516 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004267/0.6095, allocations: 335.1 kB / 0.8163 GB, free: 0.5938 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.149e-06/0.6095, allocations: 2.188 kB / 0.8163 GB, free: 0.5938 MB / 0.5762 GB Notification: Performance of matching and sorting (n=44) (initialization): time 0.0006924/0.6102, allocations: 383.4 kB / 0.8167 GB, free: 436 kB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.086e-05/0.6102, allocations: 6.969 kB / 0.8167 GB, free: 436 kB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.011e-05/0.6103, allocations: 6.391 kB / 0.8167 GB, free: 436 kB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.059e-05/0.6103, allocations: 5.969 kB / 0.8167 GB, free: 436 kB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002794/0.6106, allocations: 80.91 kB / 0.8168 GB, free: 424 kB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.249e-05/0.6106, allocations: 8 kB / 0.8168 GB, free: 424 kB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004393/0.611, allocations: 47.61 kB / 0.8169 GB, free: 392 kB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.916e-05/0.6111, allocations: 19.39 kB / 0.8169 GB, free: 388 kB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0003384/0.6114, allocations: 250.8 kB / 0.8171 GB, free: 232 kB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0002433/0.6117, allocations: 234.7 kB / 0.8173 GB, free: 16 kB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0004141/0.6121, allocations: 331.4 kB / 0.8176 GB, free: 15.76 MB / 0.5919 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.188e-06/0.6121, allocations: 1.281 kB / 0.8177 GB, free: 15.76 MB / 0.5919 GB Notification: Performance of matching and sorting (n=44) (initialization_lambda0): time 0.0006421/0.6128, allocations: 393.7 kB / 0.818 GB, free: 15.58 MB / 0.5919 GB Notification: Performance of prepare postOptimizeDAE: time 1.225e-05/0.6128, allocations: 7.281 kB / 0.818 GB, free: 15.58 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.091e-06/0.6128, allocations: 6.344 kB / 0.818 GB, free: 15.58 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.624e-06/0.6128, allocations: 10.23 kB / 0.818 GB, free: 15.58 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002399/0.6131, allocations: 76.3 kB / 0.8181 GB, free: 15.57 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.658e-06/0.6131, allocations: 12.5 kB / 0.8181 GB, free: 15.57 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004066/0.6135, allocations: 33.3 kB / 0.8182 GB, free: 15.55 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.458e-05/0.6135, allocations: 18.86 kB / 0.8182 GB, free: 15.54 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 19 * 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 (44): * Single equations (assignments): 44 * 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 0.0001675/0.6137, allocations: 202.2 kB / 0.8184 GB, free: 15.35 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001301/0.6138, allocations: 55.09 kB / 0.8184 GB, free: 15.32 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0005019/0.6144, allocations: 281.2 kB / 0.8187 GB, free: 15.19 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.588e-06/0.6144, allocations: 3.438 kB / 0.8187 GB, free: 15.19 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.171e-06/0.6144, allocations: 3.938 kB / 0.8187 GB, free: 15.18 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0003859/0.6148, allocations: 382.5 kB / 0.8191 GB, free: 14.88 MB / 0.5919 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001683/0.6165, allocations: 1.06 MB / 0.8201 GB, free: 14.16 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.127e-06/0.6165, allocations: 6.5 kB / 0.8201 GB, free: 14.16 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002154/0.6167, allocations: 55.25 kB / 0.8202 GB, free: 14.15 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 6.452e-06/0.6167, allocations: 5.062 kB / 0.8202 GB, free: 14.15 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.464e-05/0.6168, allocations: 9.953 kB / 0.8202 GB, free: 14.14 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 5.67e-06/0.6168, allocations: 7.406 kB / 0.8202 GB, free: 14.14 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.061e-06/0.6168, allocations: 10.72 kB / 0.8202 GB, free: 14.13 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006937/0.6175, allocations: 0.5125 MB / 0.8207 GB, free: 13.79 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002785/0.6178, allocations: 171.4 kB / 0.8209 GB, free: 13.64 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001071/0.6179, allocations: 8.594 kB / 0.8209 GB, free: 13.64 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003799/0.6183, allocations: 14.8 kB / 0.8209 GB, free: 13.64 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.022e-05/0.6183, allocations: 31.89 kB / 0.8209 GB, free: 13.62 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.363e-05/0.6184, allocations: 14.25 kB / 0.8209 GB, free: 13.62 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.0005677/0.6189, allocations: 414.6 kB / 0.8213 GB, free: 13.43 MB / 0.5919 GB Notification: Performance of sort global known variables: time 1.4e-07/0.6189, allocations: 0 / 0.8213 GB, free: 13.43 MB / 0.5919 GB Notification: Performance of remove unused functions: time 0.001239/0.6202, allocations: 348.2 kB / 0.8217 GB, free: 13.36 MB / 0.5919 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 10 * Number of states: 2 (vol.dynBal.U,vol1.dynBal.U) * 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 (25): * Single equations (assignments): 24 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * 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 0.000755/0.6209, allocations: 320.3 kB / 0.822 GB, free: 13.2 MB / 0.5919 GB Notification: Performance of simCode: created initialization part: time 0.0007282/0.6217, allocations: 403.2 kB / 0.8223 GB, free: 13.07 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 4.468e-06/0.6217, allocations: 0 / 0.8223 GB, free: 13.07 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.0001618/0.6219, allocations: 103.7 kB / 0.8224 GB, free: 13.04 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001814/0.6237, allocations: 380.7 kB / 0.8228 GB, free: 12.93 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001662/0.6254, allocations: 1.089 MB / 0.8239 GB, free: 12.24 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004507/0.6258, allocations: 0.8953 MB / 0.8247 GB, free: 11.53 MB / 0.5919 GB Notification: Performance of simCode: alias equations: time 0.0005518/0.6264, allocations: 163.9 kB / 0.8249 GB, free: 11.48 MB / 0.5919 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001267/0.6265, allocations: 56.03 kB / 0.825 GB, free: 11.47 MB / 0.5919 GB Notification: Performance of SimCode: time 3.8e-07/0.6265, allocations: 0 / 0.825 GB, free: 11.47 MB / 0.5919 GB Notification: Performance of Templates: time 0.0241/0.6506, allocations: 13.18 MB / 0.8378 GB, free: 5.305 MB / 0.5919 GB make -j1 -f BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.makefile (rm -f BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.sim & ./BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe 2>&1)