Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/package.mo", uses=false) Using package ThermoSysPro with version 4.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/package.mo) Running command: translateModel(ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases") translateModel(ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/package.mo): time 0.7492/0.7492, allocations: 150.9 MB / 167.2 MB, free: 14.52 MB / 142.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003007/0.0003007, allocations: 22 kB / 237.8 MB, free: 1.777 MB / 190.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.045/0.04532, allocations: 31.34 MB / 269.1 MB, free: 7.039 MB / 222.1 MB Notification: Automatically loaded package Complex 4.0.0 due to uses annotation from Modelica. Notification: Automatically loaded package ModelicaServices 4.0.0 due to uses annotation from Modelica. Notification: Automatically loaded package Modelica 4.0.0 due to usage. Notification: Performance of NFInst.instantiate(ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases): time 1.466/1.511, allocations: 295.3 MB / 0.5512 GB, free: 12.46 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.1578/1.669, allocations: 167.1 MB / 0.7144 GB, free: 4.691 MB / 0.5919 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002476/1.669, allocations: 0 / 0.7144 GB, free: 4.691 MB / 0.5919 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/WaterSteam/BoundaryConditions/Sink.mo:17:3-19:16:writable] Warning: Connector C is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:50:3-51:83:writable] Warning: Connector Cws2 is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:52:3-54:16:writable] Warning: Connector Cws1 is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:55:3-56:83:writable] Warning: Connector Cfg1 is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/MultiFluids/HeatExchangers/StaticExchangerWaterSteamFlueGases.mo:57:3-59:16:writable] Warning: Connector Cfg2 is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/WaterSteam/BoundaryConditions/SourcePQ.mo:29:3-30:52:writable] Warning: Connector C is not balanced: The number of potential variables (4) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/FlueGases/BoundaryConditions/SourcePQ.mo:18:3-19:83:writable] Warning: Connector C is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/FlueGases/BoundaryConditions/Sink.mo:15:3-17:16:writable] Warning: Connector C is not balanced: The number of potential variables (7) is not equal to the number of flow variables (0). Notification: Performance of NFTyping.typeComponents: time 0.000425/1.67, allocations: 136.1 kB / 0.7145 GB, free: 4.559 MB / 0.5919 GB Notification: Performance of NFTyping.typeBindings: time 0.0003719/1.67, allocations: 142.7 kB / 0.7147 GB, free: 4.418 MB / 0.5919 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/Properties/WaterSteam/IF97_packages.mo:783:9-783:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/Properties/WaterSteam/IF97_packages.mo:850:9-850:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoSysPro 4.0.0-master/Properties/WaterSteam/IF97_packages.mo:1088:9-1088:27:writable] Warning: cv was used before it was defined (given a value). Additional such uses may exist for the variable, but some messages were suppressed. Notification: Performance of NFTyping.typeClassSections: time 0.2609/1.931, allocations: 6.083 MB / 0.7206 GB, free: 4.262 MB / 0.5919 GB Notification: Performance of NFFlatten.flatten: time 0.0005878/1.931, allocations: 0.5361 MB / 0.7211 GB, free: 4.262 MB / 0.5919 GB Notification: Performance of NFFlatten.resolveConnections: time 0.000327/1.932, allocations: 230 kB / 0.7214 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0003143/1.932, allocations: 223.5 kB / 0.7216 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002966/1.932, allocations: 215 kB / 0.7218 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFPackage.collectConstants: time 6.899e-05/1.933, allocations: 42.25 kB / 0.7218 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFFlatten.collectFunctions: time 0.01823/1.951, allocations: 12.8 MB / 0.7343 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFScalarize.scalarize: time 0.0001152/1.951, allocations: 91.41 kB / 0.7344 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFVerifyModel.verify: time 0.0002651/1.951, allocations: 241.9 kB / 0.7346 GB, free: 4.25 MB / 0.5919 GB Notification: Performance of NFConvertDAE.convert: time 0.007916/1.959, allocations: 5.949 MB / 0.7404 GB, free: 4.148 MB / 0.5919 GB Notification: Performance of FrontEnd - DAE generated: time 3.687e-06/1.959, allocations: 5.234 kB / 0.7404 GB, free: 4.148 MB / 0.5919 GB Notification: Performance of FrontEnd: time 1.542e-06/1.959, allocations: 0.75 kB / 0.7404 GB, free: 4.148 MB / 0.5919 GB Notification: Performance of Transformations before backend: time 7.715e-06/1.959, allocations: 0 / 0.7404 GB, free: 4.148 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: 136 * Number of variables: 136 Notification: Performance of Generate backend data structure: time 0.002497/1.962, allocations: 1.186 MB / 0.7416 GB, free: 19.46 MB / 0.6075 GB Notification: Performance of prepare preOptimizeDAE: time 3.03e-05/1.962, allocations: 15.05 kB / 0.7416 GB, free: 19.45 MB / 0.6075 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 6.868e-05/1.962, allocations: 53.91 kB / 0.7417 GB, free: 19.43 MB / 0.6075 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002031/1.962, allocations: 280.5 kB / 0.7419 GB, free: 19.2 MB / 0.6075 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.706e-05/1.962, allocations: 31.56 kB / 0.742 GB, free: 19.2 MB / 0.6075 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.113e-05/1.962, allocations: 42.72 kB / 0.742 GB, free: 19.2 MB / 0.6075 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005757/1.963, allocations: 0.5195 MB / 0.7425 GB, free: 19.07 MB / 0.6075 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.156e-05/1.963, allocations: 6.812 kB / 0.7425 GB, free: 19.07 MB / 0.6075 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.993e-05/1.963, allocations: 19.09 kB / 0.7425 GB, free: 19.07 MB / 0.6075 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.4e-05/1.963, allocations: 17.58 kB / 0.7426 GB, free: 19.07 MB / 0.6075 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004177/1.963, allocations: 349.8 kB / 0.7429 GB, free: 19.07 MB / 0.6075 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 0.001957/1.965, allocations: 2.711 MB / 0.7455 GB, free: 17.09 MB / 0.6075 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0002324/1.965, allocations: 171 kB / 0.7457 GB, free: 17.07 MB / 0.6075 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001306/1.965, allocations: 108.5 kB / 0.7458 GB, free: 17.06 MB / 0.6075 GB Notification: Performance of preOpt evalFunc (simulation): time 0.06749/2.033, allocations: 33.49 MB / 0.7785 GB, free: 12.97 MB / 0.6231 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.578e-05/2.033, allocations: 38.55 kB / 0.7785 GB, free: 12.92 MB / 0.6231 GB Notification: Performance of pre-optimization done (n=40): time 2.034e-06/2.033, allocations: 0 / 0.7785 GB, free: 12.92 MB / 0.6231 GB Notification: Performance of matching and sorting (n=40): time 0.0018/2.035, allocations: 0.7129 MB / 0.7792 GB, free: 12.57 MB / 0.6231 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.753e-05/2.035, allocations: 52.53 kB / 0.7793 GB, free: 12.5 MB / 0.6231 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003783/2.035, allocations: 406.5 kB / 0.7797 GB, free: 12.34 MB / 0.6231 GB Notification: Performance of collectPreVariables (initialization): time 1.962e-05/2.035, allocations: 29.58 kB / 0.7797 GB, free: 12.3 MB / 0.6231 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001088/2.035, allocations: 204.6 kB / 0.7799 GB, free: 12.18 MB / 0.6231 GB Notification: Performance of collectInitialBindings (initialization): time 7.179e-05/2.035, allocations: 137.5 kB / 0.78 GB, free: 12.07 MB / 0.6231 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.558e-05/2.036, allocations: 76.44 kB / 0.7801 GB, free: 12.04 MB / 0.6231 GB Notification: Performance of setup shared object (initialization): time 0.0001153/2.036, allocations: 352.4 kB / 0.7804 GB, free: 11.71 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001366/2.036, allocations: 82.69 kB / 0.7805 GB, free: 11.71 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001735/2.036, allocations: 164.2 kB / 0.7807 GB, free: 11.61 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0003184/2.036, allocations: 281.3 kB / 0.7809 GB, free: 11.49 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.659e-06/2.036, allocations: 6.531 kB / 0.781 GB, free: 11.49 MB / 0.6231 GB Notification: Performance of matching and sorting (n=53) (initialization): time 0.0008721/2.037, allocations: 468.6 kB / 0.7814 GB, free: 11.37 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 1.399e-05/2.037, allocations: 8.656 kB / 0.7814 GB, free: 11.37 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.588e-06/2.037, allocations: 5.609 kB / 0.7814 GB, free: 11.36 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0007817/2.038, allocations: 303.2 kB / 0.7817 GB, free: 11.29 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001799/2.038, allocations: 42.69 kB / 0.7817 GB, free: 11.28 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001024/2.039, allocations: 1.819 MB / 0.7835 GB, free: 9.621 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002057/2.04, allocations: 54.09 kB / 0.7836 GB, free: 9.582 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.622e-05/2.04, allocations: 14.83 kB / 0.7836 GB, free: 9.578 MB / 0.6231 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 8 (Puits_Fumees.C.a,Source_Fumees.C.b,source_Eau.C.b,EchangeurEfficacite.Cfg2.b,EchangeurEfficacite.Cfg1.a,EchangeurEfficacite.Cws1.a,EchangeurEfficacite.Cws2.b,puits_Eau.C.a) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (21): * Single equations (assignments): 17 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems 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 {(1,1), (1,4)} Notification: Performance of prepare postOptimizeDAE: time 0.0001376/2.04, allocations: 159.1 kB / 0.7837 GB, free: 9.465 MB / 0.6231 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 5.876e-05/2.04, allocations: 38.64 kB / 0.7838 GB, free: 9.445 MB / 0.6231 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0009398/2.041, allocations: 0.7351 MB / 0.7845 GB, free: 9.266 MB / 0.6231 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0007967/2.042, allocations: 0.5542 MB / 0.785 GB, free: 9.117 MB / 0.6231 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.909e-06/2.042, allocations: 0 / 0.785 GB, free: 9.117 MB / 0.6231 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.538e-06/2.042, allocations: 0 / 0.785 GB, free: 9.117 MB / 0.6231 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001663/2.043, allocations: 1.359 MB / 0.7864 GB, free: 8.512 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.855e-06/2.043, allocations: 0 / 0.7864 GB, free: 8.512 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002078/2.043, allocations: 68.22 kB / 0.7864 GB, free: 8.504 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004016/2.044, allocations: 215.8 kB / 0.7866 GB, free: 8.441 MB / 0.6231 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.711e-05/2.044, allocations: 9.438 kB / 0.7866 GB, free: 8.441 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0009597/2.045, allocations: 1.851 MB / 0.7884 GB, free: 6.773 MB / 0.6231 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.122e-06/2.045, allocations: 0 / 0.7884 GB, free: 6.773 MB / 0.6231 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0008311/2.046, allocations: 0.6669 MB / 0.7891 GB, free: 6.523 MB / 0.6231 GB Notification: Performance of postOpt removeConstants (simulation): time 8.784e-05/2.046, allocations: 140.5 kB / 0.7892 GB, free: 6.383 MB / 0.6231 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 4.63e-05/2.046, allocations: 12.38 kB / 0.7892 GB, free: 6.383 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001528/2.046, allocations: 10.31 kB / 0.7893 GB, free: 6.379 MB / 0.6231 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 4.058e-05/2.046, allocations: 24.45 kB / 0.7893 GB, free: 6.367 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.494e-05/2.046, allocations: 17.56 kB / 0.7893 GB, free: 6.363 MB / 0.6231 GB Notification: Performance of sorting global known variables: time 0.0002252/2.046, allocations: 282.2 kB / 0.7896 GB, free: 6.25 MB / 0.6231 GB Notification: Performance of sort global known variables: time 1.3e-07/2.046, allocations: 2.938 kB / 0.7896 GB, free: 6.25 MB / 0.6231 GB Notification: Performance of remove unused functions: time 0.002068/2.048, allocations: 0.8473 MB / 0.7904 GB, free: 6.137 MB / 0.6231 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * 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 simulation (38): * Single equations (assignments): 34 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems 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 {(1,1), (1,5)} Notification: Performance of Backend phase and start with SimCode phase: time 0.003012/2.051, allocations: 1.107 MB / 0.7915 GB, free: 5.582 MB / 0.6231 GB Notification: Performance of simCode: created initialization part: time 0.000801/2.052, allocations: 496.6 kB / 0.7919 GB, free: 5.215 MB / 0.6231 GB Notification: Performance of simCode: created event and clocks part: time 2.374e-06/2.052, allocations: 4 kB / 0.792 GB, free: 5.211 MB / 0.6231 GB Notification: Performance of simCode: created simulation system equations: time 0.0004139/2.053, allocations: 237.4 kB / 0.7922 GB, free: 5.059 MB / 0.6231 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0008784/2.054, allocations: 187.2 kB / 0.7924 GB, free: 4.926 MB / 0.6231 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001145/2.055, allocations: 0.9389 MB / 0.7933 GB, free: 4.07 MB / 0.6231 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003268/2.055, allocations: 0.8608 MB / 0.7941 GB, free: 3.18 MB / 0.6231 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 6.549e-05/2.055, allocations: 38.75 kB / 0.7942 GB, free: 3.145 MB / 0.6231 GB Notification: Performance of SimCode: time 2.4e-07/2.055, allocations: 0 / 0.7942 GB, free: 3.145 MB / 0.6231 GB Notification: Performance of Templates: time 0.02873/2.084, allocations: 26.51 MB / 0.82 GB, free: 8.789 MB / 0.6544 GB make -j1 -f ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.makefile (rm -f ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe ; mkfifo ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe ; head -c 1048576 < ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe >> ../files/ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.sim & ./ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases -abortSlowSimulation -alarm=480 -lv LOG_STATS > ThermoSysPro_ThermoSysPro.Examples.SimpleExamples.TestStaticExchangerWaterSteamFlueGases.pipe 2>&1)