Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.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/Buildings 10.1.0-maint.10.0.x/package.mo", uses=false) Using package Buildings with version 10.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.0-maint.10.0.x/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: "" <> buildModelFMU(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume,fileNamePrefix="Buildings_10_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume,fileNamePrefix="Buildings_10_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001156/0.001156, allocations: 111.3 kB / 15.23 MB, free: 0.6602 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001118/0.001118, allocations: 188.2 kB / 16.13 MB, free: 6.645 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.591/1.591, allocations: 222.9 MB / 239.8 MB, free: 4.504 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.1.0-maint.10.0.x/package.mo): time 2.981/2.981, allocations: 437 MB / 0.71 GB, free: 5.355 MB / 0.5606 GB Notification: Performance of FrontEnd - loaded program: time 0.001285/0.001285, allocations: 59.91 kB / 0.8687 GB, free: 5.098 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.07/1.071, allocations: 151.6 MB / 1.017 GB, free: 2.746 MB / 0.7637 GB Notification: Performance of NFInst.instantiate(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume): time 0.2972/1.369, allocations: 233.7 MB / 1.245 GB, free: 8.211 MB / 0.9981 GB Notification: Performance of NFInst.instExpressions: time 1.005/2.374, allocations: 10.5 MB / 1.255 GB, free: 2.102 MB / 0.9981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004604/2.378, allocations: 54.41 kB / 1.255 GB, free: 2.102 MB / 0.9981 GB Notification: Performance of NFTyping.typeComponents: time 0.005333/2.384, allocations: 1.03 MB / 1.256 GB, free: 2.102 MB / 0.9981 GB Notification: Performance of NFTyping.typeBindings: time 0.01538/2.399, allocations: 3.44 MB / 1.26 GB, free: 2.043 MB / 0.9981 GB Notification: Performance of NFTyping.typeClassSections: time 0.009054/2.408, allocations: 1.88 MB / 1.261 GB, free: 1.984 MB / 0.9981 GB Notification: Performance of NFFlatten.flatten: time 0.01988/2.428, allocations: 6.281 MB / 1.268 GB, free: 1.973 MB / 0.9981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.005908/2.434, allocations: 1.34 MB / 1.269 GB, free: 1.82 MB / 0.9981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.008422/2.443, allocations: 1.373 MB / 1.27 GB, free: 1.82 MB / 0.9981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0076/2.45, allocations: 1.539 MB / 1.272 GB, free: 1.816 MB / 0.9981 GB Notification: Performance of NFPackage.collectConstants: time 0.001342/2.452, allocations: 94.94 kB / 1.272 GB, free: 1.816 MB / 0.9981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0135/2.465, allocations: 3.742 MB / 1.275 GB, free: 1.777 MB / 0.9981 GB Notification: Performance of NFScalarize.scalarize: time 0.002775/2.468, allocations: 0.6158 MB / 1.276 GB, free: 1.777 MB / 0.9981 GB Notification: Performance of NFVerifyModel.verify: time 0.005671/2.474, allocations: 0.9704 MB / 1.277 GB, free: 1.777 MB / 0.9981 GB Notification: Performance of NFConvertDAE.convert: time 0.01581/2.49, allocations: 3.943 MB / 1.281 GB, free: 1.566 MB / 0.9981 GB Notification: Performance of FrontEnd - DAE generated: time 1.127e-05/2.49, allocations: 1.094 kB / 1.281 GB, free: 1.566 MB / 0.9981 GB Notification: Performance of FrontEnd: time 1.904e-06/2.49, allocations: 0 / 1.281 GB, free: 1.566 MB / 0.9981 GB Notification: Performance of Transformations before backend: time 9.934e-05/2.49, allocations: 0 / 1.281 GB, free: 1.566 MB / 0.9981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 344 * Number of variables: 344 Notification: Performance of Generate backend data structure: time 0.01019/2.5, allocations: 2.486 MB / 1.283 GB, free: 16.41 MB / 1.014 GB Notification: Performance of prepare preOptimizeDAE: time 7.977e-05/2.5, allocations: 15.19 kB / 1.283 GB, free: 16.41 MB / 1.014 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0004094/2.5, allocations: 202.7 kB / 1.284 GB, free: 16.37 MB / 1.014 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004235/2.505, allocations: 0.5175 MB / 1.284 GB, free: 16.26 MB / 1.014 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003353/2.508, allocations: 1.23 MB / 1.285 GB, free: 15.84 MB / 1.014 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001246/2.508, allocations: 99.19 kB / 1.285 GB, free: 15.83 MB / 1.014 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002967/2.509, allocations: 146.7 kB / 1.285 GB, free: 15.83 MB / 1.014 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003924/2.513, allocations: 1.678 MB / 1.287 GB, free: 15.62 MB / 1.014 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.119e-05/2.513, allocations: 1.875 kB / 1.287 GB, free: 15.62 MB / 1.014 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001687/2.513, allocations: 61.36 kB / 1.287 GB, free: 15.62 MB / 1.014 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001237/2.513, allocations: 64.62 kB / 1.287 GB, free: 15.62 MB / 1.014 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003372/2.516, allocations: 1.452 MB / 1.289 GB, free: 15.6 MB / 1.014 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 0.01298/2.529, allocations: 6.956 MB / 1.295 GB, free: 12.23 MB / 1.014 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002145/2.531, allocations: 1.198 MB / 1.297 GB, free: 12 MB / 1.014 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001038/2.533, allocations: 0.6109 MB / 1.297 GB, free: 11.98 MB / 1.014 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001022/2.534, allocations: 0.866 MB / 1.298 GB, free: 11.04 MB / 1.014 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001125/2.535, allocations: 0.6059 MB / 1.299 GB, free: 10.99 MB / 1.014 GB Notification: Performance of pre-optimization done (n=110): time 4.268e-06/2.535, allocations: 0 / 1.299 GB, free: 10.99 MB / 1.014 GB Notification: Performance of matching and sorting (n=110): time 0.003436/2.538, allocations: 1.57 MB / 1.3 GB, free: 10.88 MB / 1.014 GB Notification: Performance of inlineWhenForInitialization (initialization): time 7.476e-05/2.538, allocations: 95.58 kB / 1.3 GB, free: 10.78 MB / 1.014 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001969/2.54, allocations: 1.194 MB / 1.301 GB, free: 10.61 MB / 1.014 GB Notification: Performance of collectPreVariables (initialization): time 0.0001427/2.54, allocations: 44.86 kB / 1.301 GB, free: 10.58 MB / 1.014 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006625/2.541, allocations: 0.6792 MB / 1.302 GB, free: 10.34 MB / 1.014 GB Notification: Performance of collectInitialBindings (initialization): time 0.0004609/2.542, allocations: 385.1 kB / 1.302 GB, free: 10.1 MB / 1.014 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003385/2.542, allocations: 181.7 kB / 1.303 GB, free: 10.08 MB / 1.014 GB Notification: Performance of setup shared object (initialization): time 0.0001568/2.542, allocations: 344.6 kB / 1.303 GB, free: 9.773 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007297/2.543, allocations: 428.5 kB / 1.303 GB, free: 9.766 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008879/2.544, allocations: 0.5534 MB / 1.304 GB, free: 9.664 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001968/2.546, allocations: 1.009 MB / 1.305 GB, free: 9.566 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.885e-06/2.546, allocations: 1.906 kB / 1.305 GB, free: 9.566 MB / 1.014 GB Notification: Performance of matching and sorting (n=126) (initialization): time 0.002367/2.548, allocations: 1.221 MB / 1.306 GB, free: 9.453 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 2.351e-05/2.548, allocations: 4.312 kB / 1.306 GB, free: 9.453 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.394e-05/2.548, allocations: 7.375 kB / 1.306 GB, free: 9.449 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.43e-05/2.548, allocations: 11.03 kB / 1.306 GB, free: 9.449 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009668/2.549, allocations: 223.1 kB / 1.306 GB, free: 9.441 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.536e-05/2.549, allocations: 7.781 kB / 1.306 GB, free: 9.441 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001851/2.551, allocations: 179.1 kB / 1.307 GB, free: 9.383 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.737e-05/2.551, allocations: 37.78 kB / 1.307 GB, free: 9.383 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001432/2.553, allocations: 0.7368 MB / 1.307 GB, free: 9.301 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008218/2.553, allocations: 0.5464 MB / 1.308 GB, free: 9.195 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001544/2.555, allocations: 0.9923 MB / 1.309 GB, free: 9.086 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.909e-06/2.555, allocations: 2.469 kB / 1.309 GB, free: 9.086 MB / 1.014 GB Notification: Performance of matching and sorting (n=126) (initialization_lambda0): time 0.002281/2.557, allocations: 1.197 MB / 1.31 GB, free: 8.957 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 2.105e-05/2.557, allocations: 8.75 kB / 1.31 GB, free: 8.957 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.705e-06/2.557, allocations: 3.438 kB / 1.31 GB, free: 8.957 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.338e-05/2.557, allocations: 5.312 kB / 1.31 GB, free: 8.957 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000963/2.558, allocations: 216.2 kB / 1.31 GB, free: 8.953 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.752e-05/2.558, allocations: 15.36 kB / 1.31 GB, free: 8.949 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001695/2.56, allocations: 157.2 kB / 1.31 GB, free: 8.902 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.881e-05/2.56, allocations: 37.16 kB / 1.31 GB, free: 8.902 MB / 1.014 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 5 ($PRE.mRoo_flow.nextTimeEvent,$whenCondition1,mRoo_flow.nextTimeEventScaled,$PRE.mRoo_flow.nextTimeEventScaled,mRoo_flow.nextTimeEvent) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (126): * Single equations (assignments): 126 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0004006/2.56, allocations: 240 kB / 1.311 GB, free: 8.719 MB / 1.014 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002648/2.561, allocations: 148.9 kB / 1.311 GB, free: 8.645 MB / 1.014 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002391/2.563, allocations: 1.24 MB / 1.312 GB, free: 8.562 MB / 1.014 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.354e-05/2.563, allocations: 18.02 kB / 1.312 GB, free: 8.555 MB / 1.014 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.866e-06/2.563, allocations: 0 / 1.312 GB, free: 8.555 MB / 1.014 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001591/2.565, allocations: 1.013 MB / 1.313 GB, free: 8.465 MB / 1.014 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005851/2.571, allocations: 3.169 MB / 1.316 GB, free: 7.844 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.684e-06/2.571, allocations: 4.5 kB / 1.316 GB, free: 7.844 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001131/2.572, allocations: 225.3 kB / 1.316 GB, free: 7.844 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.447e-05/2.572, allocations: 8.531 kB / 1.316 GB, free: 7.844 MB / 1.014 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 9.002e-05/2.572, allocations: 28.84 kB / 1.316 GB, free: 7.844 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.203e-05/2.572, allocations: 9.062 kB / 1.316 GB, free: 7.84 MB / 1.014 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.38e-06/2.572, allocations: 6.25 kB / 1.316 GB, free: 7.84 MB / 1.014 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003374/2.575, allocations: 1.908 MB / 1.318 GB, free: 7.504 MB / 1.014 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001048/2.576, allocations: 361.8 kB / 1.319 GB, free: 7.32 MB / 1.014 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002147/2.577, allocations: 25.61 kB / 1.319 GB, free: 7.32 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001141/2.578, allocations: 115.2 kB / 1.319 GB, free: 7.297 MB / 1.014 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002118/2.578, allocations: 79.33 kB / 1.319 GB, free: 7.289 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.773e-05/2.578, allocations: 42.62 kB / 1.319 GB, free: 7.289 MB / 1.014 GB Notification: Performance of sorting global known variables: time 0.001347/2.579, allocations: 0.8214 MB / 1.32 GB, free: 7.18 MB / 1.014 GB Notification: Performance of sort global known variables: time 1.6e-07/2.579, allocations: 0 / 1.32 GB, free: 7.18 MB / 1.014 GB Notification: Performance of remove unused functions: time 0.002974/2.582, allocations: 0.8352 MB / 1.32 GB, free: 7.066 MB / 1.014 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 9 (roo.dynBal.medium.Xi[1],roo.dynBal.U,roo.dynBal.m,oriChiTop.mExc,oriBot.mExc,oriChiBot.mExc,sha.vol.dynBal.medium.Xi[1],sha.vol.dynBal.U,sha.vol.dynBal.m) * Number of discrete variables: 3 ($whenCondition1,mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEventScaled) * Number of discrete states: 2 (mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (110): * Single equations (assignments): 108 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.00544/2.588, allocations: 2.946 MB / 1.323 GB, free: 6.07 MB / 1.014 GB Notification: Performance of simCode: created initialization part: time 0.003711/2.592, allocations: 1.609 MB / 1.325 GB, free: 6.039 MB / 1.014 GB Notification: Performance of simCode: created event and clocks part: time 1.015e-05/2.592, allocations: 3.5 kB / 1.325 GB, free: 6.039 MB / 1.014 GB Notification: Performance of simCode: created simulation system equations: time 0.001012/2.593, allocations: 0.5701 MB / 1.325 GB, free: 6.031 MB / 1.014 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00491/2.598, allocations: 0.8283 MB / 1.326 GB, free: 5.957 MB / 1.014 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02056/2.618, allocations: 12.61 MB / 1.339 GB, free: 0.918 MB / 1.014 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001037/2.619, allocations: 1.365 MB / 1.34 GB, free: 184 kB / 1.014 GB Notification: Performance of simCode: alias equations: time 0.00217/2.621, allocations: 452.4 kB / 1.34 GB, free: 84 kB / 1.014 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0008842/2.622, allocations: 0.6285 MB / 1.341 GB, free: 76 kB / 1.014 GB Notification: Performance of SimCode: time 1.663e-06/2.622, allocations: 0 / 1.341 GB, free: 76 kB / 1.014 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.07818/2.701, allocations: 40.88 MB / 1.381 GB, free: 0.7383 MB / 1.045 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002435/2.701, allocations: 254 kB / 1.381 GB, free: 496 kB / 1.045 GB Notification: Performance of buildModelFMU: Generate platform static: time 3.114/5.815, allocations: 0 / 1.381 GB, free: 496 kB / 1.045 GB (rm -f Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; mkfifo Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; head -c 1048576 < Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe >> ../files/Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume_res.mat --tempDir=temp_Buildings_10_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 Buildings_10_Buildings_Airflow_Multizone_Examples_ChimneyShaftWithVolume.fmu > Buildings_10_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe 2>&1)