Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.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.MassExchangers.Validation.ConstantEffectivenessZeroFlow,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow")
translateModel(IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001679/0.001679, allocations: 105.6 kB / 16.52 MB, free: 6.266 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001651/0.001651, allocations: 197 kB / 17.44 MB, free: 5.887 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.409/1.409, allocations: 222.9 MB / 241.1 MB, free: 15.33 MB / 206.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.7752/0.7752, allocations: 115.3 MB / 406.6 MB, free: 6.406 MB / 318.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.001545/0.001545, allocations: 63.91 kB / 493.6 MB, free: 0.8398 MB / 398.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.4178/0.4193, allocations: 76.17 MB / 0.5564 GB, free: 36.21 MB / 446.1 MB
Notification: Performance of NFInst.instantiate(IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow): time 0.6667/1.086, allocations: 212 MB / 0.7634 GB, free: 1.805 MB / 0.5762 GB
Notification: Performance of NFInst.instExpressions: time 0.01226/1.098, allocations: 7.14 MB / 0.7704 GB, free: 1.68 MB / 0.5762 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.002616/1.101, allocations: 39.75 kB / 0.7704 GB, free: 1.68 MB / 0.5762 GB
Notification: Performance of NFTyping.typeComponents: time 0.002743/1.104, allocations: 0.66 MB / 0.7711 GB, free: 1.664 MB / 0.5762 GB
Notification: Performance of NFTyping.typeBindings: time 0.008138/1.112, allocations: 2.376 MB / 0.7734 GB, free: 1.551 MB / 0.5762 GB
Notification: Performance of NFTyping.typeClassSections: time 0.003991/1.116, allocations: 1.045 MB / 0.7744 GB, free: 1.523 MB / 0.5762 GB
Notification: Performance of NFFlatten.flatten: time 0.006563/1.123, allocations: 3.755 MB / 0.7781 GB, free: 1.52 MB / 0.5762 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.002082/1.125, allocations: 0.9263 MB / 0.779 GB, free: 1.391 MB / 0.5762 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.005641/1.13, allocations: 1.786 MB / 0.7807 GB, free: 1.359 MB / 0.5762 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.003633/1.134, allocations: 0.9472 MB / 0.7817 GB, free: 1.359 MB / 0.5762 GB
Notification: Performance of NFPackage.collectConstants: time 0.0004171/1.135, allocations: 59.59 kB / 0.7817 GB, free: 1.359 MB / 0.5762 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.00749/1.142, allocations: 2.82 MB / 0.7845 GB, free: 1.328 MB / 0.5762 GB
Notification: Performance of NFScalarize.scalarize: time 0.0008353/1.143, allocations: 367 kB / 0.7848 GB, free: 1.328 MB / 0.5762 GB
Notification: Performance of NFVerifyModel.verify: time 0.001565/1.145, allocations: 0.6277 MB / 0.7854 GB, free: 1.328 MB / 0.5762 GB
Notification: Performance of NFConvertDAE.convert: time 0.003257/1.148, allocations: 1.828 MB / 0.7872 GB, free: 1.191 MB / 0.5762 GB
Notification: Performance of FrontEnd - DAE generated: time 6.642e-06/1.148, allocations: 0 / 0.7872 GB, free: 1.191 MB / 0.5762 GB
Notification: Performance of FrontEnd: time 1.303e-06/1.148, allocations: 0 / 0.7872 GB, free: 1.191 MB / 0.5762 GB
Notification: Performance of Transformations before backend: time 2.636e-05/1.148, allocations: 2.688 kB / 0.7872 GB, free: 1.191 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: 209
 * Number of variables: 209
Notification: Performance of Generate backend data structure: time 0.005336/1.153, allocations: 1.84 MB / 0.789 GB, free: 16.27 MB / 0.5919 GB
Notification: Performance of prepare preOptimizeDAE: time 5.388e-05/1.153, allocations: 10.31 kB / 0.789 GB, free: 16.27 MB / 0.5919 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003204/1.156, allocations: 0.5409 MB / 0.7895 GB, free: 16.18 MB / 0.5919 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001771/1.158, allocations: 0.9656 MB / 0.7905 GB, free: 15.83 MB / 0.5919 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0006038/1.159, allocations: 173.5 kB / 0.7907 GB, free: 15.82 MB / 0.5919 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001434/1.159, allocations: 85.17 kB / 0.7907 GB, free: 15.82 MB / 0.5919 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.002809/1.162, allocations: 1.237 MB / 0.7919 GB, free: 15.75 MB / 0.5919 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.973e-05/1.162, allocations: 0 / 0.7919 GB, free: 15.75 MB / 0.5919 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001043/1.162, allocations: 37.42 kB / 0.792 GB, free: 15.74 MB / 0.5919 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.07e-05/1.162, allocations: 46.8 kB / 0.792 GB, free: 15.74 MB / 0.5919 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003693/1.166, allocations: 1.547 MB / 0.7935 GB, free: 15.71 MB / 0.5919 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 0.00653/1.172, allocations: 4.051 MB / 0.7975 GB, free: 14.09 MB / 0.5919 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.002635/1.175, allocations: 1 MB / 0.7985 GB, free: 14.04 MB / 0.5919 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.001503/1.176, allocations: 0.6632 MB / 0.7991 GB, free: 14.02 MB / 0.5919 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.001211/1.178, allocations: 0.6109 MB / 0.7997 GB, free: 13.45 MB / 0.5919 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.204e-05/1.178, allocations: 41.3 kB / 0.7998 GB, free: 13.41 MB / 0.5919 GB
Notification: Performance of pre-optimization done (n=76): time 3.497e-06/1.178, allocations: 0 / 0.7998 GB, free: 13.41 MB / 0.5919 GB
Notification: Performance of matching and sorting (n=76): time 0.005091/1.183, allocations: 1.816 MB / 0.8015 GB, free: 13.27 MB / 0.5919 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.811e-05/1.183, allocations: 63.91 kB / 0.8016 GB, free: 13.2 MB / 0.5919 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001133/1.184, allocations: 0.8219 MB / 0.8024 GB, free: 13.05 MB / 0.5919 GB
Notification: Performance of collectPreVariables (initialization): time 0.0001078/1.184, allocations: 39.8 kB / 0.8024 GB, free: 13.02 MB / 0.5919 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0003529/1.185, allocations: 443.9 kB / 0.8029 GB, free: 12.85 MB / 0.5919 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0002753/1.185, allocations: 267.2 kB / 0.8031 GB, free: 12.68 MB / 0.5919 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003289/1.185, allocations: 149 kB / 0.8032 GB, free: 12.66 MB / 0.5919 GB
Notification: Performance of setup shared object (initialization): time 0.0001659/1.185, allocations: 331.2 kB / 0.8036 GB, free: 12.36 MB / 0.5919 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.001565/1.187, allocations: 0.539 MB / 0.8041 GB, free: 12.34 MB / 0.5919 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.00171/1.189, allocations: 0.6517 MB / 0.8047 GB, free: 12.24 MB / 0.5919 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.00274/1.191, allocations: 1.133 MB / 0.8058 GB, free: 12.14 MB / 0.5919 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.521e-06/1.191, allocations: 0 / 0.8058 GB, free: 12.14 MB / 0.5919 GB
Notification: Performance of matching and sorting (n=84) (initialization): time 0.003405/1.195, allocations: 1.345 MB / 0.8071 GB, free: 11.91 MB / 0.5919 GB
Notification: Performance of prepare postOptimizeDAE: time 5.571e-05/1.195, allocations: 37.02 kB / 0.8072 GB, free: 11.88 MB / 0.5919 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.06e-05/1.195, allocations: 4.062 kB / 0.8072 GB, free: 11.88 MB / 0.5919 GB
Notification: Performance of postOpt tearingSystem (initialization): time 2.487e-05/1.195, allocations: 9.922 kB / 0.8072 GB, free: 11.87 MB / 0.5919 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001588/1.197, allocations: 258.5 kB / 0.8074 GB, free: 11.81 MB / 0.5919 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.000739/1.197, allocations: 1.19 MB / 0.8086 GB, free: 10.62 MB / 0.5919 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001448/1.199, allocations: 179.9 kB / 0.8088 GB, free: 10.54 MB / 0.5919 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001009/1.199, allocations: 34.66 kB / 0.8088 GB, free: 10.54 MB / 0.5919 GB
Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002061/1.201, allocations: 0.7599 MB / 0.8096 GB, free: 10.33 MB / 0.5919 GB
Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001597/1.203, allocations: 0.6503 MB / 0.8102 GB, free: 10.13 MB / 0.5919 GB
Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.002774/1.205, allocations: 1.136 MB / 0.8113 GB, free: 9.855 MB / 0.5919 GB
Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.956e-06/1.205, allocations: 0 / 0.8113 GB, free: 9.855 MB / 0.5919 GB
Notification: Performance of matching and sorting (n=84) (initialization_lambda0): time 0.003362/1.209, allocations: 1.335 MB / 0.8126 GB, free: 9.512 MB / 0.5919 GB
Notification: Performance of prepare postOptimizeDAE: time 4.495e-05/1.209, allocations: 37.17 kB / 0.8126 GB, free: 9.48 MB / 0.5919 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.611e-06/1.209, allocations: 2.5 kB / 0.8126 GB, free: 9.48 MB / 0.5919 GB
Notification: Performance of postOpt tearingSystem (initialization): time 7.794e-06/1.209, allocations: 2.781 kB / 0.8126 GB, free: 9.48 MB / 0.5919 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001226/1.21, allocations: 232.5 kB / 0.8129 GB, free: 9.422 MB / 0.5919 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.006e-06/1.21, allocations: 5.031 kB / 0.8129 GB, free: 9.422 MB / 0.5919 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001404/1.211, allocations: 166.1 kB / 0.813 GB, free: 9.352 MB / 0.5919 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.409e-05/1.212, allocations: 35.78 kB / 0.8131 GB, free: 9.344 MB / 0.5919 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 4
 * Number of states: 0 ()
 * Number of discrete variables: 2 (hex.i2_w,hex.i1_w)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (83):
 * Single equations (assignments): 80
 * Array equations: 0
 * Algorithm blocks: 1
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 2
 * Torn equation systems: 0
 * 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): 2 systems
   {1, 1}
 * Without analytic Jacobian (size): 0 systems
Notification: Performance of prepare postOptimizeDAE: time 0.0003991/1.212, allocations: 222.8 kB / 0.8133 GB, free: 9.16 MB / 0.5919 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002313/1.212, allocations: 105 kB / 0.8134 GB, free: 9.105 MB / 0.5919 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003618/1.216, allocations: 1.361 MB / 0.8147 GB, free: 8.754 MB / 0.5919 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.121e-05/1.216, allocations: 7.266 kB / 0.8147 GB, free: 8.754 MB / 0.5919 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.225e-05/1.216, allocations: 7.312 kB / 0.8147 GB, free: 8.75 MB / 0.5919 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.04e-05/1.216, allocations: 3.984 kB / 0.8147 GB, free: 8.746 MB / 0.5919 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005678/1.222, allocations: 2.855 MB / 0.8175 GB, free: 7.68 MB / 0.5919 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.596e-06/1.222, allocations: 4.625 kB / 0.8175 GB, free: 7.68 MB / 0.5919 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001226/1.223, allocations: 236.7 kB / 0.8177 GB, free: 7.621 MB / 0.5919 GB
Notification: Performance of postOpt tearingSystem (simulation): time 1.058e-05/1.223, allocations: 7.719 kB / 0.8177 GB, free: 7.621 MB / 0.5919 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.075e-05/1.223, allocations: 24.09 kB / 0.8178 GB, free: 7.613 MB / 0.5919 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0005884/1.224, allocations: 1.191 MB / 0.8189 GB, free: 6.434 MB / 0.5919 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.143e-06/1.224, allocations: 8.156 kB / 0.8189 GB, free: 6.434 MB / 0.5919 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003229/1.227, allocations: 1.475 MB / 0.8204 GB, free: 5.875 MB / 0.5919 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0005944/1.227, allocations: 303.8 kB / 0.8207 GB, free: 5.68 MB / 0.5919 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001491/1.228, allocations: 24.3 kB / 0.8207 GB, free: 5.676 MB / 0.5919 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00121/1.229, allocations: 137.7 kB / 0.8208 GB, free: 5.625 MB / 0.5919 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001533/1.229, allocations: 69.08 kB / 0.8209 GB, free: 5.598 MB / 0.5919 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.175e-05/1.229, allocations: 33.97 kB / 0.8209 GB, free: 5.59 MB / 0.5919 GB
Notification: Performance of sorting global known variables: time 0.0007779/1.23, allocations: 0.5688 MB / 0.8215 GB, free: 5.398 MB / 0.5919 GB
Notification: Performance of sort global known variables: time 5.31e-07/1.23, allocations: 0 / 0.8215 GB, free: 5.398 MB / 0.5919 GB
Notification: Performance of remove unused functions: time 0.001498/1.231, allocations: 0.5343 MB / 0.822 GB, free: 5.336 MB / 0.5919 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 16
 * 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 (76):
 * Single equations (assignments): 74
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 2
 * Torn equation systems: 0
 * 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): 2 systems
   {1, 1}
 * Without analytic Jacobian (size): 0 systems
Notification: Performance of Backend phase and start with SimCode phase: time 0.0006564/1.232, allocations: 279.5 kB / 0.8223 GB, free: 5.195 MB / 0.5919 GB
Notification: Performance of simCode: created initialization part: time 0.005124/1.237, allocations: 2.021 MB / 0.8242 GB, free: 4.48 MB / 0.5919 GB
Notification: Performance of simCode: created event and clocks part: time 7.885e-06/1.237, allocations: 0 / 0.8242 GB, free: 4.48 MB / 0.5919 GB
Notification: Performance of simCode: created simulation system equations: time 0.001705/1.239, allocations: 0.6775 MB / 0.8249 GB, free: 3.988 MB / 0.5919 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002706/1.242, allocations: 0.5177 MB / 0.8254 GB, free: 3.562 MB / 0.5919 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004593/1.246, allocations: 2.556 MB / 0.8279 GB, free: 1.188 MB / 0.5919 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006494/1.247, allocations: 1.099 MB / 0.829 GB, free: 88 kB / 0.5919 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005297/1.247, allocations: 95.12 kB / 0.8291 GB, free: 15.99 MB / 0.6075 GB
Notification: Performance of SimCode: time 7.61e-07/1.247, allocations: 0 / 0.8291 GB, free: 15.99 MB / 0.6075 GB
Notification: Performance of Templates: time 0.03439/1.282, allocations: 26.92 MB / 0.8553 GB, free: 5.445 MB / 0.6231 GB
make -j1 -f IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.makefile
(rm -f IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.sim & ./IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow  -abortSlowSimulation -alarm=480 -lv LOG_STATS > IBPSA_latest_IBPSA.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe 2>&1)