Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.conf.json 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/IDEAS 3.0.0-master/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/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/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 IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/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) Running command: translateModel(IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow") translateModel(IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001144/0.001144, allocations: 180 kB / 15.98 MB, free: 5.77 MB / 13.93 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.7264/0.7264, allocations: 133.4 MB / 150.1 MB, free: 11.14 MB / 122.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.407/1.407, allocations: 222.9 MB / 404.7 MB, free: 6.035 MB / 314.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001126/0.001126, allocations: 107.6 kB / 485.9 MB, free: 7.172 MB / 394.7 MB Notification: Performance of FrontEnd - loaded program: time 0.001016/0.001016, allocations: 55.91 kB / 0.5636 GB, free: 69.92 MB / 426.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1453/0.1463, allocations: 80.42 MB / 0.6421 GB, free: 5.434 MB / 442.7 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow): time 0.4891/0.6355, allocations: 159.3 MB / 0.7978 GB, free: 1.891 MB / 0.5261 GB Notification: Performance of NFInst.instExpressions: time 0.003679/0.6392, allocations: 1.777 MB / 0.7995 GB, free: 116 kB / 0.5261 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0005357/0.6398, allocations: 7.938 kB / 0.7995 GB, free: 108 kB / 0.5261 GB Notification: Performance of NFTyping.typeComponents: time 0.0007044/0.6406, allocations: 139.1 kB / 0.7996 GB, free: 15.97 MB / 0.5417 GB Notification: Performance of NFTyping.typeBindings: time 0.001402/0.642, allocations: 0.4942 MB / 0.8001 GB, free: 15.47 MB / 0.5417 GB Notification: Performance of NFTyping.typeClassSections: time 0.001169/0.6431, allocations: 360.7 kB / 0.8005 GB, free: 15.12 MB / 0.5417 GB Notification: Performance of NFFlatten.flatten: time 0.003074/0.6462, allocations: 3.513 MB / 0.8039 GB, free: 11.61 MB / 0.5417 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002386/0.6486, allocations: 2.235 MB / 0.8061 GB, free: 9.359 MB / 0.5417 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001716/0.6504, allocations: 0.9298 MB / 0.807 GB, free: 8.426 MB / 0.5417 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0008548/0.6512, allocations: 0.7506 MB / 0.8077 GB, free: 7.672 MB / 0.5417 GB Notification: Performance of NFPackage.collectConstants: time 8.896e-05/0.6513, allocations: 40 kB / 0.8077 GB, free: 7.633 MB / 0.5417 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001484/0.6528, allocations: 0.799 MB / 0.8085 GB, free: 6.832 MB / 0.5417 GB Notification: Performance of NFScalarize.scalarize: time 0.0002841/0.6531, allocations: 298.9 kB / 0.8088 GB, free: 6.539 MB / 0.5417 GB Notification: Performance of NFVerifyModel.verify: time 0.0005942/0.6537, allocations: 0.5206 MB / 0.8093 GB, free: 6.016 MB / 0.5417 GB Notification: Performance of NFConvertDAE.convert: time 0.0014/0.6551, allocations: 1.398 MB / 0.8107 GB, free: 4.613 MB / 0.5417 GB Notification: Performance of FrontEnd - DAE generated: time 4.97e-06/0.6551, allocations: 0 / 0.8107 GB, free: 4.613 MB / 0.5417 GB Notification: Performance of FrontEnd: time 8.61e-07/0.6552, allocations: 0 / 0.8107 GB, free: 4.613 MB / 0.5417 GB Notification: Performance of Transformations before backend: time 9.978e-06/0.6552, allocations: 0 / 0.8107 GB, free: 4.613 MB / 0.5417 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 126 * Number of variables: 126 Notification: Performance of Generate backend data structure: time 0.002261/0.6574, allocations: 1.451 MB / 0.8121 GB, free: 3.098 MB / 0.5417 GB Notification: Performance of prepare preOptimizeDAE: time 3.967e-05/0.6575, allocations: 12.03 kB / 0.8121 GB, free: 3.086 MB / 0.5417 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0006751/0.6582, allocations: 182.4 kB / 0.8123 GB, free: 2.906 MB / 0.5417 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001223/0.6594, allocations: 0.81 MB / 0.8131 GB, free: 2.039 MB / 0.5417 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.934e-05/0.6594, allocations: 49 kB / 0.8131 GB, free: 1.992 MB / 0.5417 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.533e-05/0.6595, allocations: 56 kB / 0.8132 GB, free: 1.938 MB / 0.5417 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00111/0.6607, allocations: 0.8161 MB / 0.814 GB, free: 1.047 MB / 0.5417 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.594e-05/0.6607, allocations: 7.938 kB / 0.814 GB, free: 1.039 MB / 0.5417 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.697e-05/0.6607, allocations: 20 kB / 0.814 GB, free: 1.02 MB / 0.5417 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.547e-05/0.6608, allocations: 16 kB / 0.814 GB, free: 1.004 MB / 0.5417 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0008892/0.6617, allocations: 0.5657 MB / 0.8146 GB, free: 444 kB / 0.5417 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 0.003629/0.6653, allocations: 4.211 MB / 0.8187 GB, free: 11.96 MB / 0.5573 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007046/0.666, allocations: 442.2 kB / 0.8191 GB, free: 11.52 MB / 0.5573 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000461/0.6665, allocations: 350.8 kB / 0.8194 GB, free: 11.17 MB / 0.5573 GB Notification: Performance of preOpt evalFunc (simulation): time 0.000289/0.6668, allocations: 194.1 kB / 0.8196 GB, free: 10.95 MB / 0.5573 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004963/0.6673, allocations: 315.1 kB / 0.8199 GB, free: 10.62 MB / 0.5573 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0001906/0.6675, allocations: 39.59 kB / 0.82 GB, free: 10.58 MB / 0.5573 GB Notification: Performance of pre-optimization done (n=33): time 2.144e-06/0.6675, allocations: 0 / 0.82 GB, free: 10.58 MB / 0.5573 GB Notification: Performance of matching and sorting (n=33): time 0.00473/0.6722, allocations: 1.558 MB / 0.8215 GB, free: 8.992 MB / 0.5573 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.621e-05/0.6723, allocations: 81.11 kB / 0.8216 GB, free: 8.895 MB / 0.5573 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001273/0.6736, allocations: 1.151 MB / 0.8227 GB, free: 7.727 MB / 0.5573 GB Notification: Performance of collectPreVariables (initialization): time 4.129e-05/0.6736, allocations: 37.7 kB / 0.8227 GB, free: 7.684 MB / 0.5573 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003635/0.674, allocations: 488.6 kB / 0.8232 GB, free: 7.203 MB / 0.5573 GB Notification: Performance of collectInitialBindings (initialization): time 9.127e-05/0.6741, allocations: 122.4 kB / 0.8233 GB, free: 7.082 MB / 0.5573 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001704/0.6743, allocations: 110.2 kB / 0.8234 GB, free: 6.969 MB / 0.5573 GB Notification: Performance of setup shared object (initialization): time 0.0001166/0.6744, allocations: 330 kB / 0.8237 GB, free: 6.641 MB / 0.5573 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003841/0.6748, allocations: 234.9 kB / 0.8239 GB, free: 6.406 MB / 0.5573 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005925/0.6754, allocations: 0.5383 MB / 0.8245 GB, free: 5.738 MB / 0.5573 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0009163/0.6763, allocations: 0.6791 MB / 0.8251 GB, free: 4.98 MB / 0.5573 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.632e-06/0.6763, allocations: 7.938 kB / 0.8251 GB, free: 4.973 MB / 0.5573 GB Notification: Performance of matching and sorting (n=56) (initialization): time 0.002307/0.6786, allocations: 1.104 MB / 0.8262 GB, free: 3.852 MB / 0.5573 GB Notification: Performance of prepare postOptimizeDAE: time 4.915e-05/0.6787, allocations: 43.55 kB / 0.8263 GB, free: 3.805 MB / 0.5573 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.122e-05/0.6787, allocations: 4 kB / 0.8263 GB, free: 3.801 MB / 0.5573 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001499/0.6802, allocations: 426.6 kB / 0.8267 GB, free: 3.383 MB / 0.5573 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003587/0.6806, allocations: 83.86 kB / 0.8268 GB, free: 3.301 MB / 0.5573 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001401/0.682, allocations: 1.109 MB / 0.8278 GB, free: 2.168 MB / 0.5573 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009428/0.683, allocations: 72.02 kB / 0.8279 GB, free: 2.098 MB / 0.5573 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.689e-05/0.683, allocations: 27.94 kB / 0.8279 GB, free: 2.07 MB / 0.5573 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0008044/0.6838, allocations: 0.5203 MB / 0.8284 GB, free: 1.543 MB / 0.5573 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005908/0.6844, allocations: 0.5108 MB / 0.8289 GB, free: 0.8984 MB / 0.5573 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0008524/0.6853, allocations: 0.5958 MB / 0.8295 GB, free: 228 kB / 0.5573 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.595e-06/0.6853, allocations: 0 / 0.8295 GB, free: 228 kB / 0.5573 GB Notification: Performance of matching and sorting (n=56) (initialization_lambda0): time 0.001671/0.687, allocations: 0.889 MB / 0.8304 GB, free: 15.31 MB / 0.573 GB Notification: Performance of prepare postOptimizeDAE: time 4.311e-05/0.6871, allocations: 37.7 kB / 0.8304 GB, free: 15.27 MB / 0.573 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.516e-06/0.6871, allocations: 7.938 kB / 0.8304 GB, free: 15.26 MB / 0.573 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005262/0.6876, allocations: 228.6 kB / 0.8307 GB, free: 15.04 MB / 0.573 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003232/0.6879, allocations: 92.02 kB / 0.8307 GB, free: 14.95 MB / 0.573 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003518/0.6915, allocations: 3.047 MB / 0.8337 GB, free: 11.77 MB / 0.573 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000885/0.6924, allocations: 88.23 kB / 0.8338 GB, free: 11.68 MB / 0.573 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.184e-05/0.6924, allocations: 24 kB / 0.8338 GB, free: 11.66 MB / 0.573 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 (pulse_m_flow.count,$PRE.pulse_m_flow.count,pulse_m_flow.T_start,$PRE.pulse_m_flow.T_start,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (35): * Single equations (assignments): 33 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(10,11)} Notification: Performance of prepare postOptimizeDAE: time 0.0001999/0.6926, allocations: 216.1 kB / 0.834 GB, free: 11.44 MB / 0.573 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001209/0.6928, allocations: 106.7 kB / 0.8341 GB, free: 11.34 MB / 0.573 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001359/0.6941, allocations: 0.7775 MB / 0.8349 GB, free: 10.55 MB / 0.573 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.891e-06/0.6941, allocations: 4 kB / 0.8349 GB, free: 10.55 MB / 0.573 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.957e-06/0.6941, allocations: 8 kB / 0.8349 GB, free: 10.54 MB / 0.573 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.809e-06/0.6942, allocations: 0 / 0.8349 GB, free: 10.54 MB / 0.573 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002466/0.6966, allocations: 1.718 MB / 0.8366 GB, free: 8.742 MB / 0.573 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.039e-06/0.6966, allocations: 4 kB / 0.8366 GB, free: 8.738 MB / 0.573 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.000242/0.6969, allocations: 56.09 kB / 0.8366 GB, free: 8.684 MB / 0.573 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005564/0.6975, allocations: 272.5 kB / 0.8369 GB, free: 8.414 MB / 0.573 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.685e-05/0.6975, allocations: 8 kB / 0.8369 GB, free: 8.406 MB / 0.573 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001118/0.6986, allocations: 1.041 MB / 0.8379 GB, free: 7.344 MB / 0.573 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.641e-06/0.6986, allocations: 7.984 kB / 0.8379 GB, free: 7.336 MB / 0.573 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0021/0.7007, allocations: 1.882 MB / 0.8398 GB, free: 5.371 MB / 0.573 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004109/0.7012, allocations: 223.8 kB / 0.84 GB, free: 5.133 MB / 0.573 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001047/0.7013, allocations: 11.98 kB / 0.84 GB, free: 5.121 MB / 0.573 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005826/0.7019, allocations: 55.88 kB / 0.84 GB, free: 5.066 MB / 0.573 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.6e-05/0.702, allocations: 27.91 kB / 0.8401 GB, free: 5.039 MB / 0.573 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.902e-05/0.702, allocations: 19.98 kB / 0.8401 GB, free: 5.02 MB / 0.573 GB Notification: Performance of sorting global known variables: time 0.001045/0.7031, allocations: 0.808 MB / 0.8409 GB, free: 4.203 MB / 0.573 GB Notification: Performance of sort global known variables: time 1.9e-07/0.7031, allocations: 4 kB / 0.8409 GB, free: 4.199 MB / 0.573 GB Notification: Performance of remove unused functions: time 0.001519/0.7046, allocations: 475.4 kB / 0.8413 GB, free: 3.734 MB / 0.573 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_m_flow.T_start,pulse_m_flow.count) * Number of discrete states: 1 (pulse_m_flow.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (13): * Single equations (assignments): 10 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(10,11)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0004514/0.7051, allocations: 171.2 kB / 0.8415 GB, free: 3.566 MB / 0.573 GB Notification: Performance of simCode: created initialization part: time 0.002673/0.7078, allocations: 1.268 MB / 0.8427 GB, free: 2.262 MB / 0.573 GB Notification: Performance of simCode: created event and clocks part: time 3.637e-06/0.7078, allocations: 0 / 0.8427 GB, free: 2.262 MB / 0.573 GB Notification: Performance of simCode: created simulation system equations: time 0.0007704/0.7085, allocations: 296.2 kB / 0.843 GB, free: 1.973 MB / 0.573 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003372/0.7119, allocations: 0.6288 MB / 0.8436 GB, free: 1.352 MB / 0.573 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003399/0.7153, allocations: 2.415 MB / 0.846 GB, free: 14.87 MB / 0.5886 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008794/0.7163, allocations: 1.185 MB / 0.8471 GB, free: 13.65 MB / 0.5886 GB Notification: Performance of simCode: alias equations: time 0.001094/0.7174, allocations: 312.4 kB / 0.8474 GB, free: 13.34 MB / 0.5886 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000154/0.7175, allocations: 71.42 kB / 0.8475 GB, free: 13.27 MB / 0.5886 GB Notification: Performance of SimCode: time 9.82e-07/0.7175, allocations: 0 / 0.8475 GB, free: 13.27 MB / 0.5886 GB Notification: Performance of Templates: time 0.03653/0.7541, allocations: 21.7 MB / 0.8687 GB, free: 7.762 MB / 0.6042 GB make -j1 -f IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.makefile (rm -f IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.sim & ./IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.Examples.Performance.PressureDrop.ParallelFlow.pipe 2>&1)