Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.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/IDEAS 3.0.0/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/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(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity") translateModel(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001081/0.001086, 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 0.001261/0.001262, allocations: 193.5 kB / 16.53 MB, free: 6.391 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.319/1.319, allocations: 222.9 MB / 240.2 MB, free: 4.406 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.7837/0.7837, allocations: 132.2 MB / 422.6 MB, free: 1.789 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001319/0.001319, allocations: 64.31 kB / 0.5018 GB, free: 3.926 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3854/0.3868, allocations: 80.2 MB / 0.5801 GB, free: 4.578 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity): time 0.03247/0.4193, allocations: 31.53 MB / 0.6109 GB, free: 13.21 MB / 462.1 MB Notification: Performance of NFInst.instExpressions: time 0.008745/0.4281, allocations: 5.318 MB / 0.6161 GB, free: 8.891 MB / 462.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001216/0.4293, allocations: 39.81 kB / 0.6161 GB, free: 8.875 MB / 462.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0009961/0.4304, allocations: 384.5 kB / 0.6165 GB, free: 8.551 MB / 462.1 MB Notification: Performance of NFTyping.typeBindings: time 0.003609/0.434, allocations: 1.438 MB / 0.6179 GB, free: 7.418 MB / 462.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.002073/0.4361, allocations: 0.8355 MB / 0.6187 GB, free: 6.781 MB / 462.1 MB Notification: Performance of NFFlatten.flatten: time 0.00276/0.4389, allocations: 2.13 MB / 0.6208 GB, free: 5.551 MB / 462.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0008737/0.4398, allocations: 0.6088 MB / 0.6214 GB, free: 5.156 MB / 462.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.001993/0.4418, allocations: 0.8068 MB / 0.6221 GB, free: 4.688 MB / 462.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0007944/0.4426, allocations: 0.5508 MB / 0.6227 GB, free: 4.355 MB / 462.1 MB Notification: Performance of NFPackage.collectConstants: time 9.057e-05/0.4427, allocations: 55.47 kB / 0.6227 GB, free: 4.355 MB / 462.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.002679/0.4454, allocations: 1.223 MB / 0.6239 GB, free: 3.668 MB / 462.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001961/0.4456, allocations: 171.1 kB / 0.6241 GB, free: 3.539 MB / 462.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0004549/0.446, allocations: 388.3 kB / 0.6245 GB, free: 3.293 MB / 462.1 MB Notification: Performance of NFConvertDAE.convert: time 0.002824/0.4489, allocations: 1.503 MB / 0.6259 GB, free: 2.348 MB / 462.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.36e-06/0.4489, allocations: 5.031 kB / 0.6259 GB, free: 2.344 MB / 462.1 MB Notification: Performance of FrontEnd: time 1.583e-06/0.4489, allocations: 4 kB / 0.6259 GB, free: 2.34 MB / 462.1 MB Notification: Performance of Transformations before backend: time 1.347e-05/0.4489, allocations: 0 / 0.6259 GB, free: 2.34 MB / 462.1 MB 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 0.001727/0.4506, allocations: 1.096 MB / 0.627 GB, free: 1.395 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.525e-05/0.4507, allocations: 8.031 kB / 0.627 GB, free: 1.387 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00246/0.4531, allocations: 283.7 kB / 0.6273 GB, free: 1.109 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001355/0.4545, allocations: 0.6626 MB / 0.6279 GB, free: 416 kB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.267e-05/0.4546, allocations: 37 kB / 0.628 GB, free: 380 kB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 7.766e-05/0.4546, allocations: 44 kB / 0.628 GB, free: 336 kB / 462.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008733/0.4555, allocations: 0.5282 MB / 0.6285 GB, free: 15.77 MB / 478.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.757e-05/0.4556, allocations: 7.984 kB / 0.6285 GB, free: 15.76 MB / 478.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.65e-05/0.4556, allocations: 16 kB / 0.6286 GB, free: 15.74 MB / 478.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.52e-05/0.4556, allocations: 12 kB / 0.6286 GB, free: 15.73 MB / 478.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006839/0.4563, allocations: 363.7 kB / 0.6289 GB, free: 15.38 MB / 478.1 MB 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 0.00303/0.4594, allocations: 2.841 MB / 0.6317 GB, free: 12.3 MB / 478.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.000534/0.4599, allocations: 305.8 kB / 0.632 GB, free: 11.98 MB / 478.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002519/0.4602, allocations: 145.6 kB / 0.6321 GB, free: 11.84 MB / 478.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0005123/0.4607, allocations: 0.6535 MB / 0.6328 GB, free: 11.04 MB / 478.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.051e-05/0.4607, allocations: 46.73 kB / 0.6328 GB, free: 10.98 MB / 478.1 MB Notification: Performance of pre-optimization done (n=28): time 1.744e-06/0.4607, allocations: 0 / 0.6328 GB, free: 10.98 MB / 478.1 MB Notification: Performance of matching and sorting (n=40): time 0.006366/0.4671, allocations: 2.094 MB / 0.6348 GB, free: 8.809 MB / 478.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 4.911e-05/0.4672, allocations: 81.11 kB / 0.6349 GB, free: 8.711 MB / 478.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007751/0.468, allocations: 0.5419 MB / 0.6355 GB, free: 8.16 MB / 478.1 MB Notification: Performance of collectPreVariables (initialization): time 3.999e-05/0.468, allocations: 33.7 kB / 0.6355 GB, free: 8.121 MB / 478.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0002439/0.4683, allocations: 328.4 kB / 0.6358 GB, free: 7.793 MB / 478.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001338/0.4684, allocations: 145.9 kB / 0.6359 GB, free: 7.648 MB / 478.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001427/0.4686, allocations: 94.14 kB / 0.636 GB, free: 7.551 MB / 478.1 MB Notification: Performance of setup shared object (initialization): time 0.0001757/0.4687, allocations: 362.8 kB / 0.6364 GB, free: 7.188 MB / 478.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003784/0.4691, allocations: 175 kB / 0.6365 GB, free: 7.012 MB / 478.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004475/0.4696, allocations: 291.2 kB / 0.6368 GB, free: 6.684 MB / 478.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.0008002/0.4704, allocations: 475.2 kB / 0.6373 GB, free: 6.176 MB / 478.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.014e-06/0.4704, allocations: 0 / 0.6373 GB, free: 6.176 MB / 478.1 MB Notification: Performance of matching and sorting (n=55) (initialization): time 0.001789/0.4722, allocations: 0.7399 MB / 0.638 GB, free: 5.422 MB / 478.1 MB Notification: Performance of prepare postOptimizeDAE: time 4.076e-05/0.4722, allocations: 7.938 kB / 0.638 GB, free: 5.414 MB / 478.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.268e-06/0.4723, allocations: 4 kB / 0.638 GB, free: 5.41 MB / 478.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.001016/0.4733, allocations: 277.7 kB / 0.6383 GB, free: 5.133 MB / 478.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002935/0.4736, allocations: 71.84 kB / 0.6383 GB, free: 5.062 MB / 478.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006198/0.4798, allocations: 4.73 MB / 0.643 GB, free: 56 kB / 478.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001237/0.4811, allocations: 63.95 kB / 0.643 GB, free: 15.99 MB / 494.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.846e-05/0.4811, allocations: 23.94 kB / 0.643 GB, free: 15.97 MB / 494.1 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0005716/0.4817, allocations: 330.7 kB / 0.6434 GB, free: 15.64 MB / 494.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0004351/0.4821, allocations: 287.2 kB / 0.6436 GB, free: 15.32 MB / 494.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0007563/0.4829, allocations: 475.3 kB / 0.6441 GB, free: 14.81 MB / 494.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.144e-06/0.4829, allocations: 192 / 0.6441 GB, free: 14.81 MB / 494.1 MB Notification: Performance of matching and sorting (n=55) (initialization_lambda0): time 0.001776/0.4847, allocations: 0.7359 MB / 0.6448 GB, free: 14.06 MB / 494.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.199e-05/0.4847, allocations: 7.938 kB / 0.6448 GB, free: 14.05 MB / 494.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.25e-06/0.4847, allocations: 4 kB / 0.6448 GB, free: 14.05 MB / 494.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009592/0.4857, allocations: 281.7 kB / 0.6451 GB, free: 13.77 MB / 494.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002597/0.486, allocations: 67.91 kB / 0.6451 GB, free: 13.7 MB / 494.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006152/0.4921, allocations: 4.739 MB / 0.6498 GB, free: 8.688 MB / 494.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001178/0.4933, allocations: 60.12 kB / 0.6498 GB, free: 8.629 MB / 494.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.873e-05/0.4934, allocations: 19.98 kB / 0.6498 GB, free: 8.609 MB / 494.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 14 * 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 (39): * Single equations (assignments): 37 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * 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): 2 systems {(2,8), (2,6)} Notification: Performance of prepare postOptimizeDAE: time 0.0001735/0.4936, allocations: 216.1 kB / 0.6501 GB, free: 8.391 MB / 494.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001487/0.4937, allocations: 59.25 kB / 0.6501 GB, free: 8.332 MB / 494.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001771/0.4955, allocations: 0.664 MB / 0.6508 GB, free: 7.656 MB / 494.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.571e-06/0.4955, allocations: 4 kB / 0.6508 GB, free: 7.652 MB / 494.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.003e-06/0.4955, allocations: 0 / 0.6508 GB, free: 7.652 MB / 494.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001563/0.4971, allocations: 0.7492 MB / 0.6515 GB, free: 6.848 MB / 494.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003038/0.5002, allocations: 1.722 MB / 0.6532 GB, free: 5.059 MB / 494.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.739e-06/0.5002, allocations: 4 kB / 0.6532 GB, free: 5.055 MB / 494.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002483/0.5004, allocations: 51.91 kB / 0.6532 GB, free: 5.004 MB / 494.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0009578/0.5014, allocations: 249.5 kB / 0.6535 GB, free: 4.754 MB / 494.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.219e-05/0.5014, allocations: 16 kB / 0.6535 GB, free: 4.738 MB / 494.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005439/0.5069, allocations: 4.315 MB / 0.6577 GB, free: 148 kB / 494.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.477e-06/0.5069, allocations: 7.969 kB / 0.6577 GB, free: 140 kB / 494.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002112/0.509, allocations: 0.9349 MB / 0.6586 GB, free: 15.17 MB / 0.4981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002646/0.5093, allocations: 184.4 kB / 0.6588 GB, free: 14.97 MB / 0.4981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 9.331e-05/0.5094, allocations: 12.06 kB / 0.6588 GB, free: 14.96 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009804/0.5104, allocations: 55.92 kB / 0.6589 GB, free: 14.91 MB / 0.4981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.62e-05/0.5105, allocations: 31.95 kB / 0.6589 GB, free: 14.88 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.118e-05/0.5105, allocations: 12 kB / 0.6589 GB, free: 14.86 MB / 0.4981 GB Notification: Performance of sorting global known variables: time 0.0006409/0.5112, allocations: 390.8 kB / 0.6593 GB, free: 14.48 MB / 0.4981 GB Notification: Performance of sort global known variables: time 1.7e-07/0.5112, allocations: 0 / 0.6593 GB, free: 14.48 MB / 0.4981 GB Notification: Performance of remove unused functions: time 0.001493/0.5127, allocations: 415.9 kB / 0.6597 GB, free: 14.08 MB / 0.4981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 2 (vol.ports[1].h_outflow,vol1.ports[1].h_outflow) * 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 (28): * Single equations (assignments): 26 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * 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): 2 systems {(2,6), (2,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.000572/0.5133, allocations: 300.7 kB / 0.66 GB, free: 13.79 MB / 0.4981 GB Notification: Performance of simCode: created initialization part: time 0.003211/0.5165, allocations: 1.41 MB / 0.6613 GB, free: 12.33 MB / 0.4981 GB Notification: Performance of simCode: created event and clocks part: time 3.968e-06/0.5165, allocations: 0 / 0.6613 GB, free: 12.33 MB / 0.4981 GB Notification: Performance of simCode: created simulation system equations: time 0.001259/0.5178, allocations: 0.5441 MB / 0.6619 GB, free: 11.76 MB / 0.4981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00164/0.5194, allocations: 343.9 kB / 0.6622 GB, free: 11.44 MB / 0.4981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001999/0.5214, allocations: 1.243 MB / 0.6634 GB, free: 10.18 MB / 0.4981 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004563/0.5219, allocations: 0.9304 MB / 0.6643 GB, free: 9.219 MB / 0.4981 GB Notification: Performance of simCode: alias equations: time 0.0005705/0.5225, allocations: 133.5 kB / 0.6644 GB, free: 9.09 MB / 0.4981 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001319/0.5226, allocations: 51.42 kB / 0.6645 GB, free: 9.039 MB / 0.4981 GB Notification: Performance of SimCode: time 3.51e-07/0.5226, allocations: 3.938 kB / 0.6645 GB, free: 9.035 MB / 0.4981 GB Notification: Performance of Templates: time 0.02799/0.5506, allocations: 18.49 MB / 0.6826 GB, free: 6.793 MB / 0.5137 GB make -j1 -f IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.makefile (rm -f IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe ; mkfifo IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe >> ../files/IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.sim & ./IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe 2>&1)