Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.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.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir") translateModel(IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009403/0.0009404, allocations: 88.17 kB / 15.7 MB, free: 460 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001296/0.001297, allocations: 177.1 kB / 16.58 MB, free: 6.512 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.444/1.444, allocations: 223.3 MB / 240.6 MB, free: 5.414 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.7299/0.7299, allocations: 115.5 MB / 407.2 MB, free: 2.844 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0004819/0.0004821, allocations: 8 kB / 495.2 MB, free: 6.723 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1647/0.1652, allocations: 77.52 MB / 0.5593 GB, free: 9.402 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir): time 0.988/1.153, allocations: 283.8 MB / 0.8365 GB, free: 15.34 MB / 0.6387 GB Notification: Performance of NFInst.instExpressions: time 0.0409/1.194, allocations: 24.92 MB / 0.8608 GB, free: 15.03 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.006691/1.201, allocations: 112 kB / 0.8609 GB, free: 15.02 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.005489/1.206, allocations: 1.107 MB / 0.862 GB, free: 15.01 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.02045/1.227, allocations: 4.18 MB / 0.8661 GB, free: 14.83 MB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.01049/1.237, allocations: 2.511 MB / 0.8685 GB, free: 14.77 MB / 0.6387 GB Notification: Performance of NFFlatten.flatten: time 0.01634/1.254, allocations: 9.777 MB / 0.8781 GB, free: 14.75 MB / 0.6387 GB Notification: Performance of NFFlatten.resolveConnections: time 0.006056/1.26, allocations: 2.142 MB / 0.8802 GB, free: 14.46 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.01036/1.27, allocations: 2.986 MB / 0.8831 GB, free: 14.44 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00683/1.277, allocations: 2.32 MB / 0.8854 GB, free: 14.43 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.001749/1.279, allocations: 129.8 kB / 0.8855 GB, free: 14.43 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.01217/1.291, allocations: 2.841 MB / 0.8883 GB, free: 14.37 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.002551/1.294, allocations: 0.8757 MB / 0.8891 GB, free: 14.37 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.002739/1.296, allocations: 0.6998 MB / 0.8898 GB, free: 14.34 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.009143/1.306, allocations: 4.757 MB / 0.8944 GB, free: 13.96 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 4.829e-06/1.306, allocations: 0 / 0.8944 GB, free: 13.96 MB / 0.6387 GB Notification: Performance of FrontEnd: time 1.312e-06/1.306, allocations: 0 / 0.8944 GB, free: 13.96 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 0.0002253/1.306, allocations: 0 / 0.8944 GB, free: 13.96 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 547 * Number of variables: 547 Notification: Performance of Generate backend data structure: time 0.00831/1.314, allocations: 3.299 MB / 0.8977 GB, free: 11.91 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 4.268e-05/1.314, allocations: 7.344 kB / 0.8977 GB, free: 11.91 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.005488/1.32, allocations: 0.8128 MB / 0.8985 GB, free: 11.57 MB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.006381/1.326, allocations: 2.419 MB / 0.9008 GB, free: 10.57 MB / 0.6387 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001903/1.326, allocations: 170.1 kB / 0.901 GB, free: 10.55 MB / 0.6387 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0008312/1.327, allocations: 218.2 kB / 0.9012 GB, free: 10.55 MB / 0.6387 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.007001/1.334, allocations: 2.541 MB / 0.9037 GB, free: 9.805 MB / 0.6387 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0001085/1.334, allocations: 5.781 kB / 0.9037 GB, free: 9.805 MB / 0.6387 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000507/1.335, allocations: 89.66 kB / 0.9038 GB, free: 9.801 MB / 0.6387 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001437/1.335, allocations: 89.34 kB / 0.9039 GB, free: 9.789 MB / 0.6387 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.004811/1.34, allocations: 2.021 MB / 0.9058 GB, free: 9.469 MB / 0.6387 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 0.0195/1.359, allocations: 12.38 MB / 0.9179 GB, free: 17.23 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002294/1.362, allocations: 1.496 MB / 0.9194 GB, free: 16.86 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001436/1.363, allocations: 0.7663 MB / 0.9201 GB, free: 16.76 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002215/1.365, allocations: 1.992 MB / 0.9221 GB, free: 14.52 MB / 0.6544 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 5.371e-05/1.366, allocations: 49.94 kB / 0.9221 GB, free: 14.48 MB / 0.6544 GB Notification: Performance of pre-optimization done (n=150): time 3.477e-06/1.366, allocations: 0 / 0.9221 GB, free: 14.48 MB / 0.6544 GB Notification: Performance of matching and sorting (n=152): time 0.01213/1.378, allocations: 5.035 MB / 0.927 GB, free: 12.73 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.699e-05/1.378, allocations: 66.06 kB / 0.9271 GB, free: 12.66 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003275/1.381, allocations: 2.071 MB / 0.9291 GB, free: 12.11 MB / 0.6544 GB Notification: Performance of collectPreVariables (initialization): time 0.0002016/1.381, allocations: 53.48 kB / 0.9292 GB, free: 12.08 MB / 0.6544 GB Notification: Performance of collectInitialEqns (initialization): time 0.000907/1.382, allocations: 1.258 MB / 0.9304 GB, free: 11.54 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 0.0006047/1.383, allocations: 0.5285 MB / 0.9309 GB, free: 11.15 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.648e-05/1.383, allocations: 36.69 kB / 0.931 GB, free: 11.15 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 0.0001948/1.383, allocations: 374.5 kB / 0.9313 GB, free: 10.82 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009563/1.384, allocations: 0.5906 MB / 0.9319 GB, free: 10.74 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001188/1.385, allocations: 0.9758 MB / 0.9328 GB, free: 10.24 MB / 0.6544 GB Warning: It was not possible to determine if the initialization problem is consistent, because of not evaluable parameters/start values during compile time: duc.vol_b.dynBal.medium.p = duc.vol_b.dynBal.p_start (sin1.p = duc.vol_b.dynBal.p_start) Notification: Performance of analyzeInitialSystem (initialization): time 0.01609/1.401, allocations: 3.97 MB / 0.9367 GB, free: 9.113 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.237e-05/1.401, allocations: 1.969 kB / 0.9367 GB, free: 9.113 MB / 0.6544 GB Notification: Performance of matching and sorting (n=208) (initialization): time 0.005756/1.407, allocations: 2.102 MB / 0.9388 GB, free: 8.184 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 0.0003933/1.408, allocations: 393.1 kB / 0.9391 GB, free: 7.699 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.791e-05/1.408, allocations: 16.56 kB / 0.9392 GB, free: 7.684 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00106/1.409, allocations: 213 kB / 0.9394 GB, free: 7.5 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001582/1.41, allocations: 358.8 kB / 0.9397 GB, free: 7.184 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001505/1.412, allocations: 1.776 MB / 0.9414 GB, free: 5.418 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003395/1.415, allocations: 209.8 kB / 0.9416 GB, free: 5.238 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003644/1.416, allocations: 80.97 kB / 0.9417 GB, free: 5.172 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 1.368e-05/1.416, allocations: 4 kB / 0.9417 GB, free: 5.168 MB / 0.6544 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.004487/1.42, allocations: 1.857 MB / 0.9435 GB, free: 3.977 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.568e-05/1.42, allocations: 24.05 kB / 0.9436 GB, free: 3.953 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009765/1.421, allocations: 215.2 kB / 0.9438 GB, free: 3.766 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00138/1.423, allocations: 342.6 kB / 0.9441 GB, free: 3.465 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00114/1.424, allocations: 1.192 MB / 0.9453 GB, free: 2.297 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003044/1.427, allocations: 202.3 kB / 0.9455 GB, free: 2.129 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002868/1.427, allocations: 76.17 kB / 0.9455 GB, free: 2.066 MB / 0.6544 GB Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization sytem: duc.vol_b.dynBal.medium.p = duc.vol_b.dynBal.p_start. Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 44 * 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 (196): * Single equations (assignments): 187 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 2 * 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: 2 {1 3,1 3} Notification: Performance of prepare postOptimizeDAE: time 0.002168/1.429, allocations: 0.7111 MB / 0.9462 GB, free: 1.621 MB / 0.6544 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001072/1.43, allocations: 260.8 kB / 0.9465 GB, free: 1.363 MB / 0.6544 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.005992/1.436, allocations: 2.371 MB / 0.9488 GB, free: 15.75 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.695e-05/1.436, allocations: 22.23 kB / 0.9488 GB, free: 15.73 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.687e-05/1.436, allocations: 3.938 kB / 0.9488 GB, free: 15.72 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003617/1.44, allocations: 2.1 MB / 0.9509 GB, free: 14.1 MB / 0.67 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01323/1.453, allocations: 5.371 MB / 0.9561 GB, free: 10.29 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.588e-05/1.453, allocations: 20.08 kB / 0.9561 GB, free: 10.27 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001285/1.455, allocations: 279.8 kB / 0.9564 GB, free: 10.02 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0009964/1.456, allocations: 251.4 kB / 0.9566 GB, free: 9.816 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001716/1.456, allocations: 53.47 kB / 0.9567 GB, free: 9.789 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003803/1.46, allocations: 4.656 MB / 0.9612 GB, free: 5.168 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.594e-06/1.46, allocations: 11 kB / 0.9612 GB, free: 5.16 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.006372/1.466, allocations: 3.25 MB / 0.9644 GB, free: 2.781 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002025/1.468, allocations: 0.5746 MB / 0.965 GB, free: 2.328 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0008673/1.469, allocations: 40.86 kB / 0.965 GB, free: 2.312 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002539/1.472, allocations: 185.4 kB / 0.9652 GB, free: 2.156 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003414/1.472, allocations: 155.1 kB / 0.9653 GB, free: 2.031 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002205/1.472, allocations: 75.2 kB / 0.9654 GB, free: 1.969 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.002695/1.475, allocations: 1.452 MB / 0.9668 GB, free: 0.9258 MB / 0.67 GB Notification: Performance of sort global known variables: time 3.21e-07/1.475, allocations: 0 / 0.9668 GB, free: 0.9258 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.005308/1.48, allocations: 1.345 MB / 0.9681 GB, free: 15.68 MB / 0.6856 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 24 * Number of states: 13 (pip.del.x,pip.timDel.x,pip.vol_b.dynBal.U,pip.vol_a.dynBal.U,duc.del.x,duc.timDel.x,duc.vol_b.dynBal.medium.Xi[1],duc.vol_b.dynBal.U,duc.vol_b.dynBal.mC[1],duc.vol_a.dynBal.medium.Xi[1],duc.vol_a.dynBal.U,duc.vol_a.dynBal.m,duc.vol_a.dynBal.mC[1]) * 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 (156): * Single equations (assignments): 133 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 18 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 4 * 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: 2 {(1,100.0%) 2,(1,100.0%) 2} * Non-linear torn systems: 2 {1 5,1 5} Notification: Performance of Backend phase and start with SimCode phase: time 0.001568/1.482, allocations: 0.6897 MB / 0.9688 GB, free: 15.11 MB / 0.6856 GB Notification: Performance of simCode: created initialization part: time 0.00514/1.487, allocations: 2.882 MB / 0.9716 GB, free: 12.98 MB / 0.6856 GB Notification: Performance of simCode: created event and clocks part: time 1.163e-05/1.487, allocations: 4 kB / 0.9716 GB, free: 12.97 MB / 0.6856 GB Notification: Performance of simCode: created simulation system equations: time 0.002352/1.489, allocations: 1.462 MB / 0.9731 GB, free: 11.83 MB / 0.6856 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.008472/1.498, allocations: 1.5 MB / 0.9745 GB, free: 10.62 MB / 0.6856 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01331/1.511, allocations: 6.893 MB / 0.9813 GB, free: 4.289 MB / 0.6856 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001677/1.513, allocations: 1.903 MB / 0.9831 GB, free: 2.434 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.003589/1.517, allocations: 0.7525 MB / 0.9838 GB, free: 1.699 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006125/1.517, allocations: 223.9 kB / 0.9841 GB, free: 1.492 MB / 0.6856 GB Notification: Performance of SimCode: time 1.553e-06/1.517, allocations: 0 / 0.9841 GB, free: 1.492 MB / 0.6856 GB Notification: Performance of Templates: time 0.127/1.644, allocations: 57.39 MB / 1.04 GB, free: 9.129 MB / 0.7481 GB make -j1 -f IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.makefile (rm -f IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.sim & ./IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir -abortSlowSimulation -alarm=480 -lv LOG_STATS > IBPSA_latest_IBPSA.Fluid.FixedResistances.Validation.PlugFlowPipes.TransportWaterAir.pipe 2>&1)