Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.conf.json loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) Using package ModelicaServices with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Using package Modelica with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package Buildings with version 8.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo) Running command: translateModel(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume") translateModel(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume") Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 1.504/1.504, allocations: 291.7 MB / 306.8 MB, free: 7.684 MB / 234.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0009085/0.0009085, allocations: 177.5 kB / 375.4 MB, free: 5.113 MB / 298.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.225/1.225, allocations: 225.7 MB / 0.6538 GB, free: 13.61 MB / 490.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.000701/0.000701, allocations: 103.9 kB / 0.7699 GB, free: 50.24 MB / 0.5417 GB Notification: Performance of FrontEnd - loaded program: time 0.000343/0.000343, allocations: 12 kB / 0.8956 GB, free: 11.89 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.5207/0.5211, allocations: 118.1 MB / 1.011 GB, free: 57.41 MB / 0.7136 GB Notification: Performance of NFInst.instantiate(Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume): time 0.1809/0.702, allocations: 215 MB / 1.221 GB, free: 6.609 MB / 0.8073 GB Notification: Performance of NFInst.instExpressions: time 0.01345/0.7155, allocations: 9.7 MB / 1.23 GB, free: 15.68 MB / 0.823 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001839/0.7174, allocations: 47.44 kB / 1.23 GB, free: 15.66 MB / 0.823 GB Notification: Performance of NFTyping.typeComponents: time 0.002117/0.7195, allocations: 0.8082 MB / 1.231 GB, free: 15.25 MB / 0.823 GB Notification: Performance of NFTyping.typeBindings: time 0.006624/0.7262, allocations: 2.62 MB / 1.234 GB, free: 13.84 MB / 0.823 GB Notification: Performance of NFTyping.typeClassSections: time 0.004256/0.7304, allocations: 1.478 MB / 1.235 GB, free: 13.1 MB / 0.823 GB Notification: Performance of NFFlatten.flatten: time 0.007356/0.7378, allocations: 5.275 MB / 1.24 GB, free: 11.05 MB / 0.823 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002297/0.7401, allocations: 1.28 MB / 1.242 GB, free: 10.59 MB / 0.823 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002985/0.7431, allocations: 1.352 MB / 1.243 GB, free: 10.09 MB / 0.823 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002554/0.7457, allocations: 1.405 MB / 1.244 GB, free: 9.156 MB / 0.823 GB Notification: Performance of NFPackage.collectConstants: time 0.0002288/0.746, allocations: 76.94 kB / 1.244 GB, free: 9.082 MB / 0.823 GB Notification: Performance of NFFlatten.collectFunctions: time 0.004682/0.7506, allocations: 1.615 MB / 1.246 GB, free: 7.727 MB / 0.823 GB Notification: Performance of NFScalarize.scalarize: time 0.0007786/0.7514, allocations: 0.5719 MB / 1.246 GB, free: 7.344 MB / 0.823 GB Notification: Performance of NFVerifyModel.verify: time 0.0006155/0.7521, allocations: 404.7 kB / 1.247 GB, free: 6.941 MB / 0.823 GB Notification: Performance of NFConvertDAE.convert: time 0.0035/0.7556, allocations: 2.576 MB / 1.249 GB, free: 5.402 MB / 0.823 GB Notification: Performance of FrontEnd - DAE generated: time 4.389e-06/0.7556, allocations: 0 / 1.249 GB, free: 5.402 MB / 0.823 GB Notification: Performance of FrontEnd: time 1.513e-06/0.7556, allocations: 0 / 1.249 GB, free: 5.402 MB / 0.823 GB Notification: Performance of Transformations before backend: time 3.53e-05/0.7556, allocations: 0 / 1.249 GB, free: 5.402 MB / 0.823 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 0.004436/0.7601, allocations: 2.123 MB / 1.251 GB, free: 3.496 MB / 0.823 GB Notification: Performance of prepare preOptimizeDAE: time 3.506e-05/0.7601, allocations: 8.688 kB / 1.251 GB, free: 3.488 MB / 0.823 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002858/0.763, allocations: 0.5199 MB / 1.252 GB, free: 3.07 MB / 0.823 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001848/0.7648, allocations: 1.216 MB / 1.253 GB, free: 1.992 MB / 0.823 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.638e-05/0.7649, allocations: 106.6 kB / 1.253 GB, free: 1.887 MB / 0.823 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001908/0.7651, allocations: 132.8 kB / 1.253 GB, free: 1.758 MB / 0.823 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002839/0.768, allocations: 1.667 MB / 1.255 GB, free: 328 kB / 0.823 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.733e-05/0.768, allocations: 8.469 kB / 1.255 GB, free: 320 kB / 0.823 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001191/0.7682, allocations: 52.61 kB / 1.255 GB, free: 268 kB / 0.823 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.445e-05/0.7682, allocations: 72.62 kB / 1.255 GB, free: 204 kB / 0.823 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002432/0.7707, allocations: 1.445 MB / 1.257 GB, free: 14.85 MB / 0.8386 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 0.007578/0.7783, allocations: 6.956 MB / 1.263 GB, free: 7.453 MB / 0.8386 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001667/0.7799, allocations: 1.188 MB / 1.264 GB, free: 6.223 MB / 0.8386 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008858/0.7808, allocations: 0.6121 MB / 1.265 GB, free: 5.613 MB / 0.8386 GB Notification: Performance of preOpt evalFunc (simulation): time 0.000839/0.7817, allocations: 0.8685 MB / 1.266 GB, free: 4.562 MB / 0.8386 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.00098/0.7827, allocations: 0.6102 MB / 1.267 GB, free: 3.938 MB / 0.8386 GB Notification: Performance of pre-optimization done (n=110): time 3.046e-06/0.7827, allocations: 4 kB / 1.267 GB, free: 3.934 MB / 0.8386 GB Notification: Performance of matching and sorting (n=110): time 0.002795/0.7855, allocations: 1.572 MB / 1.268 GB, free: 2.355 MB / 0.8386 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.938e-05/0.7856, allocations: 90.11 kB / 1.268 GB, free: 2.25 MB / 0.8386 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001349/0.7869, allocations: 1.174 MB / 1.269 GB, free: 1.07 MB / 0.8386 GB Notification: Performance of collectPreVariables (initialization): time 7.483e-05/0.787, allocations: 45.7 kB / 1.269 GB, free: 1.02 MB / 0.8386 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004954/0.7875, allocations: 0.6659 MB / 1.27 GB, free: 356 kB / 0.8386 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003191/0.7878, allocations: 386.4 kB / 1.27 GB, free: 15.96 MB / 0.8542 GB Notification: Performance of simplifyInitialFunctions (initialization): time 4.954e-05/0.7879, allocations: 20 kB / 1.27 GB, free: 15.94 MB / 0.8542 GB Notification: Performance of setup shared object (initialization): time 0.0001124/0.788, allocations: 349.9 kB / 1.271 GB, free: 15.59 MB / 0.8542 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006824/0.7887, allocations: 425.7 kB / 1.271 GB, free: 15.18 MB / 0.8542 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007851/0.7895, allocations: 0.569 MB / 1.272 GB, free: 14.57 MB / 0.8542 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001478/0.791, allocations: 1.005 MB / 1.273 GB, free: 13.53 MB / 0.8542 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.066e-06/0.791, allocations: 4 kB / 1.273 GB, free: 13.52 MB / 0.8542 GB Notification: Performance of matching and sorting (n=126) (initialization): time 0.001878/0.7929, allocations: 1.214 MB / 1.274 GB, free: 12.31 MB / 0.8542 GB Notification: Performance of prepare postOptimizeDAE: time 8.45e-05/0.793, allocations: 168 kB / 1.274 GB, free: 12.11 MB / 0.8542 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.136e-06/0.793, allocations: 7.984 kB / 1.274 GB, free: 12.1 MB / 0.8542 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.975e-05/0.793, allocations: 8 kB / 1.274 GB, free: 12.09 MB / 0.8542 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008933/0.7939, allocations: 219.7 kB / 1.274 GB, free: 11.88 MB / 0.8542 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.077e-05/0.7939, allocations: 4 kB / 1.274 GB, free: 11.87 MB / 0.8542 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001156/0.7951, allocations: 173.4 kB / 1.274 GB, free: 11.7 MB / 0.8542 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.469e-05/0.7952, allocations: 36 kB / 1.274 GB, free: 11.67 MB / 0.8542 GB Notification: Performance of prepare postOptimizeDAE: time 5.671e-06/0.7952, allocations: 4 kB / 1.274 GB, free: 11.66 MB / 0.8542 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.00158/0.7968, allocations: 1.031 MB / 1.275 GB, free: 10.64 MB / 0.8542 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.37e-06/0.7968, allocations: 4.938 kB / 1.275 GB, free: 10.63 MB / 0.8542 GB Notification: Performance of postOpt tearingSystem (initialization): time 8.256e-06/0.7968, allocations: 12.3 kB / 1.275 GB, free: 10.62 MB / 0.8542 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008035/0.7976, allocations: 207.7 kB / 1.276 GB, free: 10.42 MB / 0.8542 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.193e-05/0.7976, allocations: 15.92 kB / 1.276 GB, free: 10.4 MB / 0.8542 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009775/0.7986, allocations: 162.8 kB / 1.276 GB, free: 10.24 MB / 0.8542 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.573e-05/0.7987, allocations: 36 kB / 1.276 GB, free: 10.21 MB / 0.8542 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 ($whenCondition1,$PRE.mRoo_flow.nextTimeEvent,mRoo_flow.nextTimeEvent,$PRE.mRoo_flow.nextTimeEventScaled,mRoo_flow.nextTimeEventScaled) * 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 (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0006446/0.7993, allocations: 486 kB / 1.276 GB, free: 9.723 MB / 0.8542 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001931/0.7995, allocations: 151 kB / 1.276 GB, free: 9.574 MB / 0.8542 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001991/0.8015, allocations: 1.241 MB / 1.278 GB, free: 8.32 MB / 0.8542 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.105e-06/0.8015, allocations: 8 kB / 1.278 GB, free: 8.312 MB / 0.8542 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.374e-06/0.8016, allocations: 3.938 kB / 1.278 GB, free: 8.309 MB / 0.8542 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001501/0.8031, allocations: 1.011 MB / 1.279 GB, free: 7.285 MB / 0.8542 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004299/0.8074, allocations: 3.16 MB / 1.282 GB, free: 4.012 MB / 0.8542 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.218e-06/0.8074, allocations: 3.938 kB / 1.282 GB, free: 4.008 MB / 0.8542 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001012/0.8084, allocations: 240.1 kB / 1.282 GB, free: 3.773 MB / 0.8542 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.894e-06/0.8084, allocations: 6.109 kB / 1.282 GB, free: 3.77 MB / 0.8542 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.141e-05/0.8085, allocations: 28 kB / 1.282 GB, free: 3.742 MB / 0.8542 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 8.195e-06/0.8085, allocations: 13.73 kB / 1.282 GB, free: 3.73 MB / 0.8542 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.973e-06/0.8085, allocations: 0 / 1.282 GB, free: 3.73 MB / 0.8542 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002712/0.8112, allocations: 2 MB / 1.284 GB, free: 1.684 MB / 0.8542 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005119/0.8118, allocations: 358.9 kB / 1.284 GB, free: 1.312 MB / 0.8542 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001733/0.8119, allocations: 31.98 kB / 1.284 GB, free: 1.281 MB / 0.8542 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009213/0.8129, allocations: 109.2 kB / 1.284 GB, free: 1.176 MB / 0.8542 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001472/0.813, allocations: 84.86 kB / 1.285 GB, free: 1.094 MB / 0.8542 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.24e-05/0.8131, allocations: 38.86 kB / 1.285 GB, free: 1.059 MB / 0.8542 GB Notification: Performance of sorting global known variables: time 0.0009459/0.8141, allocations: 0.8097 MB / 1.285 GB, free: 252 kB / 0.8542 GB Notification: Performance of sort global known variables: time 1.41e-07/0.8141, allocations: 0 / 1.285 GB, free: 252 kB / 0.8542 GB Notification: Performance of remove unused functions: time 0.001601/0.8157, allocations: 0.8377 MB / 1.286 GB, free: 15.4 MB / 0.8698 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 9 (roo.dynBal.U,roo.dynBal.m,roo.dynBal.mXi[1],oriChiTop.mExc,oriBot.mExc,oriChiBot.mExc,sha.vol.dynBal.U,sha.vol.dynBal.m,sha.vol.dynBal.mXi[1]) * 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 (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001186/0.8169, allocations: 0.6461 MB / 1.287 GB, free: 14.96 MB / 0.8698 GB Notification: Performance of simCode: created initialization part: time 0.002449/0.8193, allocations: 1.612 MB / 1.288 GB, free: 13.36 MB / 0.8698 GB Notification: Performance of simCode: created event and clocks part: time 3.777e-06/0.8193, allocations: 0 / 1.288 GB, free: 13.36 MB / 0.8698 GB Notification: Performance of simCode: created simulation system equations: time 0.0008286/0.8202, allocations: 0.5677 MB / 1.289 GB, free: 12.79 MB / 0.8698 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003704/0.8239, allocations: 0.8262 MB / 1.29 GB, free: 12 MB / 0.8698 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00492/0.8288, allocations: 3.994 MB / 1.294 GB, free: 7.965 MB / 0.8698 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008767/0.8297, allocations: 1.36 MB / 1.295 GB, free: 6.57 MB / 0.8698 GB Notification: Performance of simCode: alias equations: time 0.001719/0.8314, allocations: 449.2 kB / 1.295 GB, free: 6.141 MB / 0.8698 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003243/0.8318, allocations: 111.4 kB / 1.296 GB, free: 6.031 MB / 0.8698 GB Notification: Performance of SimCode: time 5.41e-07/0.8318, allocations: 0 / 1.296 GB, free: 6.031 MB / 0.8698 GB Notification: Performance of Templates: time 0.04018/0.872, allocations: 27.8 MB / 1.323 GB, free: 10.79 MB / 0.9011 GB make -j1 -f Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.makefile (rm -f Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; mkfifo Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe >> ../files/Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.sim & ./Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8.0.0_Buildings.Airflow.Multizone.Examples.ChimneyShaftWithVolume.pipe 2>&1)