Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo) Using package Complex with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 8.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo) Running command: "" <> buildModelFMU(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow,fileNamePrefix="Buildings_8_0_0_Buildings_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow,fileNamePrefix="Buildings_8_0_0_Buildings_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 2.704/2.704, allocations: 287.5 MB / 302.4 MB, free: 8.395 MB / 234.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.00146/0.00146, allocations: 182.4 kB / 371 MB, free: 10.87 MB / 298.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 2.231/2.231, allocations: 205.4 MB / 0.6297 GB, free: 10.61 MB / 458.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.001003/0.001003, allocations: 92.19 kB / 0.743 GB, free: 6.605 MB / 0.5573 GB Notification: Performance of FrontEnd - loaded program: time 0.0005287/0.000529, allocations: 12.5 kB / 0.8659 GB, free: 141.1 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2455/0.2461, allocations: 115.3 MB / 0.9784 GB, free: 28.28 MB / 0.6198 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow): time 0.9561/1.202, allocations: 152.4 MB / 1.127 GB, free: 0.8438 MB / 0.6823 GB Notification: Performance of NFInst.instExpressions: time 0.005594/1.208, allocations: 2.059 MB / 1.129 GB, free: 0.6328 MB / 0.6823 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008015/1.209, allocations: 11.72 kB / 1.129 GB, free: 0.6289 MB / 0.6823 GB Notification: Performance of NFTyping.typeComponents: time 0.0009578/1.21, allocations: 160.6 kB / 1.129 GB, free: 0.5742 MB / 0.6823 GB Notification: Performance of NFTyping.typeBindings: time 0.002435/1.212, allocations: 0.5018 MB / 1.13 GB, free: 456 kB / 0.6823 GB Notification: Performance of NFTyping.typeClassSections: time 0.001956/1.214, allocations: 362.7 kB / 1.13 GB, free: 428 kB / 0.6823 GB Notification: Performance of NFFlatten.flatten: time 0.00528/1.219, allocations: 3.269 MB / 1.133 GB, free: 16 MB / 0.698 GB Notification: Performance of NFFlatten.resolveConnections: time 0.004497/1.224, allocations: 2.294 MB / 1.136 GB, free: 15.61 MB / 0.698 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003655/1.228, allocations: 1.048 MB / 1.137 GB, free: 15.39 MB / 0.698 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002458/1.23, allocations: 0.8555 MB / 1.138 GB, free: 15.22 MB / 0.698 GB Notification: Performance of NFPackage.collectConstants: time 0.0003841/1.231, allocations: 45.97 kB / 1.138 GB, free: 15.22 MB / 0.698 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002991/1.234, allocations: 0.5953 MB / 1.138 GB, free: 15.18 MB / 0.698 GB Notification: Performance of NFScalarize.scalarize: time 0.0009884/1.235, allocations: 330.6 kB / 1.139 GB, free: 15.13 MB / 0.698 GB Notification: Performance of NFVerifyModel.verify: time 0.0009772/1.236, allocations: 248.5 kB / 1.139 GB, free: 15.06 MB / 0.698 GB Notification: Performance of NFConvertDAE.convert: time 0.003134/1.239, allocations: 1.177 MB / 1.14 GB, free: 14.95 MB / 0.698 GB Notification: Performance of FrontEnd - DAE generated: time 8.496e-06/1.239, allocations: 3.938 kB / 1.14 GB, free: 14.95 MB / 0.698 GB Notification: Performance of FrontEnd: time 3.006e-06/1.239, allocations: 1 kB / 1.14 GB, free: 14.95 MB / 0.698 GB Notification: Performance of Transformations before backend: time 6.099e-05/1.239, allocations: 4 kB / 1.14 GB, free: 14.94 MB / 0.698 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 0.005821/1.245, allocations: 1.516 MB / 1.141 GB, free: 13.94 MB / 0.698 GB Notification: Performance of prepare preOptimizeDAE: time 6.196e-05/1.245, allocations: 12.61 kB / 1.141 GB, free: 13.93 MB / 0.698 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0005303/1.246, allocations: 99.08 kB / 1.141 GB, free: 13.88 MB / 0.698 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00158/1.247, allocations: 207.2 kB / 1.142 GB, free: 13.79 MB / 0.698 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003585/1.251, allocations: 0.8664 MB / 1.143 GB, free: 13.3 MB / 0.698 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.387e-05/1.251, allocations: 51.12 kB / 1.143 GB, free: 13.3 MB / 0.698 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002682/1.251, allocations: 66.64 kB / 1.143 GB, free: 13.29 MB / 0.698 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003318/1.255, allocations: 0.9945 MB / 1.144 GB, free: 12.85 MB / 0.698 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.08e-05/1.255, allocations: 5.062 kB / 1.144 GB, free: 12.84 MB / 0.698 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001033/1.255, allocations: 21.66 kB / 1.144 GB, free: 12.84 MB / 0.698 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.763e-05/1.255, allocations: 14.66 kB / 1.144 GB, free: 12.84 MB / 0.698 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002573/1.257, allocations: 0.81 MB / 1.144 GB, free: 12.66 MB / 0.698 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 0.009327/1.267, allocations: 4.808 MB / 1.149 GB, free: 8.871 MB / 0.698 GB Notification: Performance of preOpt comSubExp (simulation): time 0.003952/1.271, allocations: 4.013 MB / 1.153 GB, free: 4.48 MB / 0.698 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001027/1.272, allocations: 351.9 kB / 1.153 GB, free: 4.418 MB / 0.698 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004622/1.272, allocations: 194.5 kB / 1.154 GB, free: 4.223 MB / 0.698 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0009732/1.273, allocations: 335.8 kB / 1.154 GB, free: 4.07 MB / 0.698 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0008121/1.274, allocations: 31.31 kB / 1.154 GB, free: 4.055 MB / 0.698 GB Notification: Performance of pre-optimization done (n=35): time 4.449e-06/1.274, allocations: 0 / 1.154 GB, free: 4.055 MB / 0.698 GB Notification: Performance of matching and sorting (n=35): time 0.009027/1.283, allocations: 1.5 MB / 1.155 GB, free: 3.418 MB / 0.698 GB Notification: Performance of inlineWhenForInitialization (initialization): time 8.808e-05/1.283, allocations: 89.59 kB / 1.155 GB, free: 3.316 MB / 0.698 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003148/1.286, allocations: 1.17 MB / 1.157 GB, free: 2.953 MB / 0.698 GB Notification: Performance of collectPreVariables (initialization): time 0.0002051/1.287, allocations: 40.8 kB / 1.157 GB, free: 2.922 MB / 0.698 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006884/1.287, allocations: 0.5161 MB / 1.157 GB, free: 2.699 MB / 0.698 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002028/1.288, allocations: 126.9 kB / 1.157 GB, free: 2.609 MB / 0.698 GB Notification: Performance of simplifyInitialFunctions (initialization): time 4.177e-05/1.288, allocations: 10.97 kB / 1.157 GB, free: 2.609 MB / 0.698 GB Notification: Performance of setup shared object (initialization): time 0.0001603/1.288, allocations: 322.8 kB / 1.158 GB, free: 2.301 MB / 0.698 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007285/1.289, allocations: 211.3 kB / 1.158 GB, free: 2.25 MB / 0.698 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001119/1.29, allocations: 0.5334 MB / 1.158 GB, free: 1.812 MB / 0.698 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.000984/1.291, allocations: 323.8 kB / 1.159 GB, free: 1.707 MB / 0.698 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.106e-06/1.291, allocations: 1.094 kB / 1.159 GB, free: 1.707 MB / 0.698 GB Notification: Performance of matching and sorting (n=58) (initialization): time 0.005344/1.296, allocations: 1.045 MB / 1.16 GB, free: 1.312 MB / 0.698 GB Notification: Performance of prepare postOptimizeDAE: time 0.0004014/1.297, allocations: 284.4 kB / 1.16 GB, free: 0.9883 MB / 0.698 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.292e-05/1.297, allocations: 5.156 kB / 1.16 GB, free: 0.9883 MB / 0.698 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00357/1.3, allocations: 387.4 kB / 1.16 GB, free: 0.8711 MB / 0.698 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001373/1.302, allocations: 123.9 kB / 1.16 GB, free: 0.8359 MB / 0.698 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004537/1.306, allocations: 1.667 MB / 1.162 GB, free: 15.57 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003015/1.309, allocations: 102.2 kB / 1.162 GB, free: 15.53 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002115/1.31, allocations: 23.53 kB / 1.162 GB, free: 15.53 MB / 0.7136 GB Notification: Performance of prepare postOptimizeDAE: time 2.017e-05/1.31, allocations: 11.22 kB / 1.162 GB, free: 15.52 MB / 0.7136 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.003844/1.314, allocations: 0.7793 MB / 1.163 GB, free: 15.28 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.158e-05/1.314, allocations: 5.156 kB / 1.163 GB, free: 15.28 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001372/1.315, allocations: 220.8 kB / 1.163 GB, free: 15.22 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001056/1.316, allocations: 111.5 kB / 1.163 GB, free: 15.19 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.009964/1.326, allocations: 2.945 MB / 1.166 GB, free: 13.42 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002918/1.329, allocations: 98.86 kB / 1.166 GB, free: 13.38 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001582/1.329, allocations: 24.03 kB / 1.166 GB, free: 13.38 MB / 0.7136 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 ($whenCondition1,$PRE.pulse_m_flow.T_start,pulse_m_flow.T_start,$PRE.pulse_m_flow.count,pulse_m_flow.count) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (38): * Single equations (assignments): 35 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {10 10} Notification: Performance of prepare postOptimizeDAE: time 0.001647/1.331, allocations: 486.2 kB / 1.167 GB, free: 13.11 MB / 0.7136 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005198/1.331, allocations: 114.6 kB / 1.167 GB, free: 13.05 MB / 0.7136 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003549/1.335, allocations: 0.7917 MB / 1.168 GB, free: 12.78 MB / 0.7136 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.565e-05/1.335, allocations: 5.406 kB / 1.168 GB, free: 12.78 MB / 0.7136 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.679e-06/1.335, allocations: 0 / 1.168 GB, free: 12.78 MB / 0.7136 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.058e-05/1.335, allocations: 0 / 1.168 GB, free: 12.78 MB / 0.7136 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 postOpt removeSimpleEquations (simulation): time 0.005934/1.341, allocations: 2.126 MB / 1.17 GB, free: 11.59 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.227e-05/1.341, allocations: 1.781 kB / 1.17 GB, free: 11.59 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007402/1.342, allocations: 86.14 kB / 1.17 GB, free: 11.57 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0007701/1.343, allocations: 207.3 kB / 1.17 GB, free: 11.51 MB / 0.7136 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.384e-05/1.343, allocations: 8.781 kB / 1.17 GB, free: 11.51 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001814/1.345, allocations: 1.467 MB / 1.171 GB, free: 10.3 MB / 0.7136 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.213e-06/1.345, allocations: 3.344 kB / 1.171 GB, free: 10.3 MB / 0.7136 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002246/1.347, allocations: 0.8583 MB / 1.172 GB, free: 9.887 MB / 0.7136 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007215/1.348, allocations: 232.9 kB / 1.172 GB, free: 9.719 MB / 0.7136 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001983/1.348, allocations: 12.67 kB / 1.172 GB, free: 9.715 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001245/1.349, allocations: 82.66 kB / 1.173 GB, free: 9.676 MB / 0.7136 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001468/1.349, allocations: 35.91 kB / 1.173 GB, free: 9.66 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.025e-05/1.349, allocations: 11.06 kB / 1.173 GB, free: 9.66 MB / 0.7136 GB Notification: Performance of sorting global known variables: time 0.001745/1.351, allocations: 0.8279 MB / 1.173 GB, free: 9.391 MB / 0.7136 GB Notification: Performance of sort global known variables: time 3.8e-07/1.351, allocations: 0 / 1.173 GB, free: 9.391 MB / 0.7136 GB Notification: Performance of remove unused functions: time 0.002324/1.353, allocations: 0.5123 MB / 1.174 GB, free: 9.34 MB / 0.7136 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 (25): * Single equations (assignments): 21 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {9 2} Notification: Performance of Backend phase and start with SimCode phase: time 0.002657/1.356, allocations: 1.414 MB / 1.175 GB, free: 8.41 MB / 0.7136 GB Notification: Performance of simCode: created initialization part: time 0.00467/1.361, allocations: 1.283 MB / 1.177 GB, free: 7.883 MB / 0.7136 GB Notification: Performance of simCode: created event and clocks part: time 6.562e-06/1.361, allocations: 3.938 kB / 1.177 GB, free: 7.879 MB / 0.7136 GB Notification: Performance of simCode: created simulation system equations: time 0.001268/1.362, allocations: 323.8 kB / 1.177 GB, free: 7.797 MB / 0.7136 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006984/1.369, allocations: 0.6569 MB / 1.178 GB, free: 7.547 MB / 0.7136 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02186/1.391, allocations: 7.133 MB / 1.184 GB, free: 4.199 MB / 0.7136 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001098/1.392, allocations: 1.216 MB / 1.186 GB, free: 3.305 MB / 0.7136 GB Notification: Performance of simCode: alias equations: time 0.002006/1.394, allocations: 355.4 kB / 1.186 GB, free: 3.148 MB / 0.7136 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007073/1.395, allocations: 360.8 kB / 1.186 GB, free: 2.984 MB / 0.7136 GB Notification: Performance of SimCode: time 4.699e-06/1.395, allocations: 4 kB / 1.186 GB, free: 2.98 MB / 0.7136 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.09584/1.491, allocations: 31.13 MB / 1.217 GB, free: 5.543 MB / 0.7448 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0004252/1.491, allocations: 272.6 kB / 1.217 GB, free: 5.191 MB / 0.7448 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.949/5.441, allocations: 64 / 1.217 GB, free: 5.191 MB / 0.7448 GB (rm -f Buildings_8.0.0_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe ; mkfifo Buildings_8.0.0_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe >> ../files/Buildings_8.0.0_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_8_0_0_Buildings_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_8_0_0_Buildings_Fluid_Examples_Performance_PressureDrop_SeriesParallelFlow.fmu > Buildings_8.0.0_Buildings.Fluid.Examples.Performance.PressureDrop.SeriesParallelFlow.pipe 2>&1)