Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.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: translateModel(IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised") translateModel(IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001187/0.001188, allocations: 102.9 kB / 16.27 MB, free: 5.977 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001127/0.001127, allocations: 186.4 kB / 17.19 MB, free: 5.605 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.285/1.285, allocations: 222.9 MB / 240.9 MB, free: 15.21 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.7498/0.7498, allocations: 126.4 MB / 417.4 MB, free: 12.53 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.00126/0.00126, allocations: 67.89 kB / 0.4953 GB, free: 3.105 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3354/0.3366, allocations: 78.77 MB / 0.5723 GB, free: 31.21 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised): time 0.1577/0.4944, allocations: 161.6 MB / 0.7301 GB, free: 4.098 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.003278/0.4977, allocations: 1.757 MB / 0.7318 GB, free: 2.336 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004143/0.4982, allocations: 15.88 kB / 0.7318 GB, free: 2.32 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.0005987/0.4988, allocations: 158.9 kB / 0.732 GB, free: 2.164 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.001368/0.5002, allocations: 0.525 MB / 0.7325 GB, free: 1.637 MB / 0.5606 GB Notification: Performance of NFTyping.typeClassSections: time 0.001137/0.5014, allocations: 389.3 kB / 0.7329 GB, free: 1.262 MB / 0.5606 GB Notification: Performance of NFFlatten.flatten: time 0.00268/0.5041, allocations: 2.524 MB / 0.7353 GB, free: 14.73 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003392/0.5075, allocations: 2.403 MB / 0.7377 GB, free: 12.3 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002361/0.5098, allocations: 1.164 MB / 0.7388 GB, free: 11.14 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001368/0.5112, allocations: 0.6884 MB / 0.7395 GB, free: 10.45 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.000254/0.5115, allocations: 56 kB / 0.7395 GB, free: 10.39 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001588/0.5131, allocations: 0.7368 MB / 0.7403 GB, free: 9.652 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004375/0.5135, allocations: 310.9 kB / 0.7406 GB, free: 9.348 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.0008306/0.5144, allocations: 0.5479 MB / 0.7411 GB, free: 8.797 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.001659/0.5161, allocations: 1.402 MB / 0.7425 GB, free: 7.391 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 4.889e-06/0.5161, allocations: 0 / 0.7425 GB, free: 7.391 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.513e-06/0.5161, allocations: 0 / 0.7425 GB, free: 7.391 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 1.493e-05/0.5161, allocations: 0 / 0.7425 GB, free: 7.391 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: 126 * Number of variables: 126 Notification: Performance of Generate backend data structure: time 0.002188/0.5183, allocations: 1.458 MB / 0.7439 GB, free: 5.871 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.487e-05/0.5183, allocations: 8.031 kB / 0.7439 GB, free: 5.863 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007304/0.5191, allocations: 182.5 kB / 0.7441 GB, free: 5.684 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001085/0.5202, allocations: 0.81 MB / 0.7449 GB, free: 4.816 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.652e-05/0.5202, allocations: 53 kB / 0.7449 GB, free: 4.766 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.224e-05/0.5203, allocations: 60 kB / 0.745 GB, free: 4.707 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001171/0.5215, allocations: 0.8161 MB / 0.7458 GB, free: 3.816 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.543e-05/0.5215, allocations: 4 kB / 0.7458 GB, free: 3.812 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.302e-05/0.5216, allocations: 24 kB / 0.7458 GB, free: 3.789 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.634e-05/0.5216, allocations: 15.98 kB / 0.7458 GB, free: 3.773 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0009815/0.5226, allocations: 0.5656 MB / 0.7464 GB, free: 3.203 MB / 0.5762 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.2626/0.7852, allocations: 4.221 MB / 0.7505 GB, free: 169 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001064/0.7863, allocations: 438.4 kB / 0.7509 GB, free: 168.9 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006427/0.787, allocations: 344.8 kB / 0.7512 GB, free: 168.8 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003023/0.7873, allocations: 198 kB / 0.7514 GB, free: 168.6 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0006259/0.788, allocations: 322.3 kB / 0.7517 GB, free: 168.5 MB / 0.5762 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0004701/0.7884, allocations: 32.86 kB / 0.7517 GB, free: 168.5 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=33): time 3.707e-06/0.7885, allocations: 0 / 0.7517 GB, free: 168.5 MB / 0.5762 GB Notification: Performance of matching and sorting (n=33): time 0.005855/0.7943, allocations: 1.662 MB / 0.7534 GB, free: 168.1 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.293e-05/0.7944, allocations: 84.98 kB / 0.7535 GB, free: 168 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002416/0.7968, allocations: 1.158 MB / 0.7546 GB, free: 167.6 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 7.265e-05/0.7969, allocations: 34.3 kB / 0.7546 GB, free: 167.6 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004397/0.7973, allocations: 486 kB / 0.7551 GB, free: 167.3 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001079/0.7975, allocations: 120.2 kB / 0.7552 GB, free: 167.2 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002109/0.7977, allocations: 115.5 kB / 0.7553 GB, free: 167.2 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 6.146e-05/0.7978, allocations: 324.5 kB / 0.7556 GB, free: 166.8 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004804/0.7982, allocations: 242.7 kB / 0.7558 GB, free: 166.8 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006808/0.7989, allocations: 0.5403 MB / 0.7564 GB, free: 166.3 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001102/0.8, allocations: 0.6799 MB / 0.757 GB, free: 166 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.384e-05/0.8001, allocations: 10.03 kB / 0.757 GB, free: 166 MB / 0.5762 GB Notification: Performance of matching and sorting (n=56) (initialization): time 0.002351/0.8024, allocations: 1.096 MB / 0.7581 GB, free: 165.4 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 4.219e-05/0.8025, allocations: 37.72 kB / 0.7582 GB, free: 165.3 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.362e-05/0.8025, allocations: 4.5 kB / 0.7582 GB, free: 165.3 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00125/0.8038, allocations: 375 kB / 0.7585 GB, free: 165.2 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000361/0.8041, allocations: 87.19 kB / 0.7586 GB, free: 165.2 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009751/0.8051, allocations: 1.041 MB / 0.7596 GB, free: 164.4 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009239/0.8061, allocations: 63.08 kB / 0.7597 GB, free: 164.3 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.913e-05/0.8061, allocations: 24.97 kB / 0.7597 GB, free: 164.3 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007168/0.8068, allocations: 0.5117 MB / 0.7602 GB, free: 164 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0004994/0.8074, allocations: 0.512 MB / 0.7607 GB, free: 163.5 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0007551/0.8081, allocations: 0.5978 MB / 0.7613 GB, free: 163.1 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 5.881e-06/0.8081, allocations: 1.375 kB / 0.7613 GB, free: 163.1 MB / 0.5762 GB Notification: Performance of matching and sorting (n=56) (initialization_lambda0): time 0.001578/0.8097, allocations: 0.9072 MB / 0.7622 GB, free: 162.6 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.993e-05/0.8098, allocations: 33.14 kB / 0.7622 GB, free: 162.6 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.638e-06/0.8098, allocations: 5.969 kB / 0.7622 GB, free: 162.6 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005551/0.8103, allocations: 243.7 kB / 0.7624 GB, free: 162.5 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003429/0.8107, allocations: 87.83 kB / 0.7625 GB, free: 162.4 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003209/0.8139, allocations: 3.269 MB / 0.7657 GB, free: 159.9 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001002/0.8149, allocations: 67.94 kB / 0.7658 GB, free: 159.8 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.32e-05/0.815, allocations: 26.27 kB / 0.7658 GB, free: 159.8 MB / 0.5762 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 {(1,20)} Notification: Performance of prepare postOptimizeDAE: time 0.0002113/0.8153, allocations: 221.8 kB / 0.766 GB, free: 159.6 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002399/0.8155, allocations: 103.3 kB / 0.7661 GB, free: 159.6 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001454/0.817, allocations: 0.7799 MB / 0.7669 GB, free: 159.1 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.331e-06/0.817, allocations: 3.469 kB / 0.7669 GB, free: 159.1 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.266e-06/0.817, allocations: 0 / 0.7669 GB, free: 159.1 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.173e-06/0.817, allocations: 8.516 kB / 0.7669 GB, free: 159.1 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002551/0.8196, allocations: 1.728 MB / 0.7686 GB, free: 158 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.252e-06/0.8196, allocations: 1.25 kB / 0.7686 GB, free: 158 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002474/0.8198, allocations: 51.62 kB / 0.7686 GB, free: 157.9 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004751/0.8203, allocations: 245.7 kB / 0.7689 GB, free: 157.8 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.669e-05/0.8204, allocations: 8.906 kB / 0.7689 GB, free: 157.8 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007798/0.8211, allocations: 1.014 MB / 0.7699 GB, free: 157 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.867e-06/0.8212, allocations: 2.406 kB / 0.7699 GB, free: 157 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001344/0.8225, allocations: 0.8853 MB / 0.7707 GB, free: 156.5 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004759/0.823, allocations: 214.5 kB / 0.7709 GB, free: 156.3 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000276/0.8233, allocations: 14.03 kB / 0.7709 GB, free: 156.3 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007072/0.824, allocations: 46.62 kB / 0.771 GB, free: 156.3 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001062/0.8241, allocations: 31.78 kB / 0.771 GB, free: 156.2 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.214e-05/0.8242, allocations: 13.39 kB / 0.771 GB, free: 156.2 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.001592/0.8258, allocations: 0.8137 MB / 0.7718 GB, free: 155.8 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.142e-06/0.8258, allocations: 1.094 kB / 0.7718 GB, free: 155.8 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.001839/0.8276, allocations: 465.8 kB / 0.7723 GB, free: 155.7 MB / 0.5762 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 {(1,20)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0004338/0.8281, allocations: 182.9 kB / 0.7724 GB, free: 155.6 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.002359/0.8304, allocations: 1.143 MB / 0.7736 GB, free: 154.9 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 5.35e-06/0.8304, allocations: 0 / 0.7736 GB, free: 154.9 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.000548/0.831, allocations: 253.1 kB / 0.7738 GB, free: 154.8 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002253/0.8333, allocations: 0.4993 MB / 0.7743 GB, free: 154.6 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00241/0.8357, allocations: 1.804 MB / 0.7761 GB, free: 153.5 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005123/0.8362, allocations: 1.18 MB / 0.7772 GB, free: 152.6 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.0008696/0.8371, allocations: 324.9 kB / 0.7775 GB, free: 152.3 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001275/0.8372, allocations: 71.44 kB / 0.7776 GB, free: 152.2 MB / 0.5762 GB Notification: Performance of SimCode: time 6.11e-07/0.8372, allocations: 0 / 0.7776 GB, free: 152.2 MB / 0.5762 GB Notification: Performance of Templates: time 0.02676/0.864, allocations: 20.93 MB / 0.798 GB, free: 131.6 MB / 0.5762 GB make -j1 -f IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.makefile (rm -f IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.sim & ./IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised -abortSlowSimulation -alarm=480 -lv LOG_STATS > IBPSA_latest_IBPSA.Fluid.Examples.Performance.PressureDrop.ParallelFlowOptimised.pipe 2>&1)