Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.0.0-master/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/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/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 Buildings with version 10.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.0.0-master/package.mo) Running command: translateModel(Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater") translateModel(Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.0.0-master/package.mo): time 2.055/2.055, allocations: 391.2 MB / 407 MB, free: 10.76 MB / 314.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001258/0.001257, allocations: 200.8 kB / 499.1 MB, free: 4.613 MB / 394.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.362/1.362, allocations: 222.9 MB / 0.7948 GB, free: 15.75 MB / 0.5573 GB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001012/0.001012, allocations: 111.4 kB / 0.9329 GB, free: 7.027 MB / 0.6823 GB Notification: Performance of FrontEnd - loaded program: time 0.0009884/0.0009885, allocations: 47.2 kB / 1.081 GB, free: 218.5 MB / 0.823 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2397/0.2407, allocations: 140.6 MB / 1.218 GB, free: 117.2 MB / 0.823 GB Notification: Performance of NFInst.instantiate(Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater): time 0.8391/1.08, allocations: 240.3 MB / 1.453 GB, free: 1.93 MB / 0.9167 GB Notification: Performance of NFInst.instExpressions: time 0.02687/1.107, allocations: 16.34 MB / 1.469 GB, free: 1.66 MB / 0.9167 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004656/1.111, allocations: 83.88 kB / 1.469 GB, free: 1.66 MB / 0.9167 GB Notification: Performance of NFTyping.typeComponents: time 0.004057/1.116, allocations: 1.18 MB / 1.47 GB, free: 1.625 MB / 0.9167 GB Notification: Performance of NFTyping.typeBindings: time 0.0101/1.126, allocations: 3.258 MB / 1.473 GB, free: 1.461 MB / 0.9167 GB Notification: Performance of NFTyping.typeClassSections: time 0.007095/1.133, allocations: 2.269 MB / 1.475 GB, free: 1.395 MB / 0.9167 GB Notification: Performance of NFFlatten.flatten: time 0.008989/1.142, allocations: 6.846 MB / 1.482 GB, free: 1.371 MB / 0.9167 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003017/1.145, allocations: 1.743 MB / 1.484 GB, free: 1.094 MB / 0.9167 GB Notification: Performance of NFEvalConstants.evaluate: time 0.007687/1.152, allocations: 2.701 MB / 1.486 GB, free: 1.043 MB / 0.9167 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00436/1.157, allocations: 1.667 MB / 1.488 GB, free: 0.9375 MB / 0.9167 GB Notification: Performance of NFPackage.collectConstants: time 0.0003626/1.157, allocations: 112.8 kB / 1.488 GB, free: 0.9375 MB / 0.9167 GB Notification: Performance of NFFlatten.collectFunctions: time 0.008198/1.165, allocations: 3.765 MB / 1.492 GB, free: 0.9023 MB / 0.9167 GB Notification: Performance of NFScalarize.scalarize: time 0.0009392/1.166, allocations: 0.6863 MB / 1.492 GB, free: 0.8008 MB / 0.9167 GB Notification: Performance of NFVerifyModel.verify: time 0.00203/1.168, allocations: 1.164 MB / 1.494 GB, free: 444 kB / 0.9167 GB Notification: Performance of NFConvertDAE.convert: time 0.008561/1.177, allocations: 4.594 MB / 1.498 GB, free: 15.88 MB / 0.9323 GB Notification: Performance of FrontEnd - DAE generated: time 5.19e-06/1.177, allocations: 0 / 1.498 GB, free: 15.88 MB / 0.9323 GB Notification: Performance of FrontEnd: time 1.523e-06/1.177, allocations: 4 kB / 1.498 GB, free: 15.88 MB / 0.9323 GB Notification: Performance of Transformations before backend: time 3.766e-05/1.177, allocations: 0 / 1.498 GB, free: 15.88 MB / 0.9323 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 355 * Number of variables: 355 Notification: Performance of Generate backend data structure: time 0.005774/1.183, allocations: 2.952 MB / 1.501 GB, free: 14.41 MB / 0.9323 GB Notification: Performance of prepare preOptimizeDAE: time 4.627e-05/1.183, allocations: 12.55 kB / 1.501 GB, free: 14.41 MB / 0.9323 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.005247/1.188, allocations: 0.8645 MB / 1.502 GB, free: 14.26 MB / 0.9323 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003526/1.192, allocations: 1.805 MB / 1.504 GB, free: 13.73 MB / 0.9323 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003523/1.192, allocations: 166.8 kB / 1.504 GB, free: 13.73 MB / 0.9323 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002217/1.192, allocations: 150.7 kB / 1.504 GB, free: 13.73 MB / 0.9323 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003292/1.196, allocations: 1.772 MB / 1.506 GB, free: 13.51 MB / 0.9323 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.341e-05/1.196, allocations: 6.281 kB / 1.506 GB, free: 13.51 MB / 0.9323 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001383/1.196, allocations: 57.19 kB / 1.506 GB, free: 13.51 MB / 0.9323 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.355e-05/1.196, allocations: 55.59 kB / 1.506 GB, free: 13.5 MB / 0.9323 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003567/1.199, allocations: 1.571 MB / 1.507 GB, free: 13.46 MB / 0.9323 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 0.01312/1.213, allocations: 8 MB / 1.515 GB, free: 9.402 MB / 0.9323 GB Notification: Performance of preOpt comSubExp (simulation): time 0.00304/1.216, allocations: 2.01 MB / 1.517 GB, free: 8.312 MB / 0.9323 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.00117/1.217, allocations: 0.5704 MB / 1.518 GB, free: 8.238 MB / 0.9323 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001217/1.218, allocations: 0.7768 MB / 1.518 GB, free: 7.477 MB / 0.9323 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001393/1.219, allocations: 0.6048 MB / 1.519 GB, free: 7.254 MB / 0.9323 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.001107/1.221, allocations: 123.7 kB / 1.519 GB, free: 7.199 MB / 0.9323 GB Notification: Performance of pre-optimization done (n=89): time 4.078e-06/1.221, allocations: 7.938 kB / 1.519 GB, free: 7.191 MB / 0.9323 GB Notification: Performance of matching and sorting (n=89): time 0.004455/1.225, allocations: 1.729 MB / 1.521 GB, free: 6.512 MB / 0.9323 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.728e-05/1.225, allocations: 67.22 kB / 1.521 GB, free: 6.445 MB / 0.9323 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002311/1.227, allocations: 1.628 MB / 1.522 GB, free: 5.691 MB / 0.9323 GB Notification: Performance of collectPreVariables (initialization): time 0.0001035/1.228, allocations: 45.7 kB / 1.522 GB, free: 5.648 MB / 0.9323 GB Notification: Performance of collectInitialEqns (initialization): time 0.0008641/1.228, allocations: 0.9695 MB / 1.523 GB, free: 4.801 MB / 0.9323 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002787/1.229, allocations: 303.2 kB / 1.524 GB, free: 4.543 MB / 0.9323 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004064/1.229, allocations: 228.2 kB / 1.524 GB, free: 4.41 MB / 0.9323 GB Notification: Performance of setup shared object (initialization): time 0.0001574/1.229, allocations: 347.8 kB / 1.524 GB, free: 4.074 MB / 0.9323 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001293/1.231, allocations: 498 kB / 1.525 GB, free: 3.832 MB / 0.9323 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001383/1.232, allocations: 0.8301 MB / 1.526 GB, free: 3.168 MB / 0.9323 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.002424/1.234, allocations: 1.307 MB / 1.527 GB, free: 2.309 MB / 0.9323 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.556e-06/1.234, allocations: 9.469 kB / 1.527 GB, free: 2.305 MB / 0.9323 GB Notification: Performance of matching and sorting (n=140) (initialization): time 0.003272/1.238, allocations: 1.535 MB / 1.528 GB, free: 1.582 MB / 0.9323 GB Notification: Performance of prepare postOptimizeDAE: time 4.617e-05/1.238, allocations: 34.83 kB / 1.528 GB, free: 1.551 MB / 0.9323 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.933e-05/1.238, allocations: 12.69 kB / 1.528 GB, free: 1.547 MB / 0.9323 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.28e-05/1.238, allocations: 15.59 kB / 1.528 GB, free: 1.547 MB / 0.9323 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001147/1.239, allocations: 295.6 kB / 1.529 GB, free: 1.488 MB / 0.9323 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.469e-05/1.239, allocations: 20.77 kB / 1.529 GB, free: 1.484 MB / 0.9323 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001793/1.241, allocations: 182.2 kB / 1.529 GB, free: 1.406 MB / 0.9323 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000101/1.241, allocations: 50.02 kB / 1.529 GB, free: 1.395 MB / 0.9323 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002014/1.243, allocations: 0.8707 MB / 1.53 GB, free: 0.8984 MB / 0.9323 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001283/1.244, allocations: 0.8125 MB / 1.531 GB, free: 248 kB / 0.9323 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.002334/1.247, allocations: 1.279 MB / 1.532 GB, free: 15.41 MB / 0.948 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 5.31e-06/1.247, allocations: 2.562 kB / 1.532 GB, free: 15.41 MB / 0.948 GB Notification: Performance of matching and sorting (n=140) (initialization_lambda0): time 0.003145/1.25, allocations: 1.503 MB / 1.533 GB, free: 14.7 MB / 0.948 GB Notification: Performance of prepare postOptimizeDAE: time 3.937e-05/1.25, allocations: 44.94 kB / 1.533 GB, free: 14.66 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.033e-05/1.25, allocations: 8.875 kB / 1.533 GB, free: 14.66 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.394e-05/1.25, allocations: 12.66 kB / 1.533 GB, free: 14.66 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001117/1.251, allocations: 290 kB / 1.534 GB, free: 14.6 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.767e-05/1.251, allocations: 22.08 kB / 1.534 GB, free: 14.6 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001811/1.253, allocations: 185.7 kB / 1.534 GB, free: 14.52 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.29e-05/1.253, allocations: 49.88 kB / 1.534 GB, free: 14.5 MB / 0.948 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 39 * Number of states: 0 () * Number of discrete variables: 7 (uHea.y,TSet.count,$PRE.TSet.count,TSet.T_start,$PRE.TSet.T_start,$whenCondition1,conPI.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (138): * Single equations (assignments): 136 * Array equations: 1 * Algorithm blocks: 1 * 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 0.0003927/1.253, allocations: 253.8 kB / 1.534 GB, free: 14.28 MB / 0.948 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002409/1.254, allocations: 186.7 kB / 1.534 GB, free: 14.18 MB / 0.948 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003104/1.257, allocations: 1.264 MB / 1.536 GB, free: 13.5 MB / 0.948 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.037e-06/1.257, allocations: 8.25 kB / 1.536 GB, free: 13.5 MB / 0.948 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.927e-06/1.257, allocations: 6.516 kB / 1.536 GB, free: 13.49 MB / 0.948 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002369/1.259, allocations: 1.324 MB / 1.537 GB, free: 12.59 MB / 0.948 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 0.006269/1.265, allocations: 3.216 MB / 1.54 GB, free: 10.45 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.691e-06/1.265, allocations: 2.969 kB / 1.54 GB, free: 10.45 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0009569/1.266, allocations: 199 kB / 1.54 GB, free: 10.41 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002133/1.267, allocations: 51.95 kB / 1.54 GB, free: 10.38 MB / 0.948 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.238e-05/1.267, allocations: 28.66 kB / 1.54 GB, free: 10.36 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001147/1.268, allocations: 1.415 MB / 1.542 GB, free: 8.941 MB / 0.948 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.535e-06/1.268, allocations: 2.438 kB / 1.542 GB, free: 8.941 MB / 0.948 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.1371/1.405, allocations: 32.34 MB / 1.573 GB, free: 9.598 MB / 0.9792 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007818/1.406, allocations: 350.6 kB / 1.574 GB, free: 9.234 MB / 0.9792 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001757/1.406, allocations: 20 kB / 1.574 GB, free: 9.215 MB / 0.9792 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001177/1.407, allocations: 151.8 kB / 1.574 GB, free: 9.066 MB / 0.9792 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001715/1.407, allocations: 75.38 kB / 1.574 GB, free: 8.996 MB / 0.9792 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.138e-05/1.407, allocations: 27.98 kB / 1.574 GB, free: 8.969 MB / 0.9792 GB Notification: Performance of sorting global known variables: time 0.001622/1.409, allocations: 1.094 MB / 1.575 GB, free: 7.852 MB / 0.9792 GB Notification: Performance of sort global known variables: time 1.9e-07/1.409, allocations: 0 / 1.575 GB, free: 7.852 MB / 0.9792 GB Notification: Performance of remove unused functions: time 0.006325/1.415, allocations: 1.594 MB / 1.576 GB, free: 6.258 MB / 0.9792 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 6 * Number of states: 8 (vol.dynBal.medium.Xi[1],vol.dynBal.U,vol.dynBal.m,mov.filter.s[1],mov.filter.s[2],conPI.I.y,THeaOut.T,eleHea.hea.outCon.T) * Number of discrete variables: 4 ($whenCondition1,TSet.T_start,TSet.count,uHea.y) * Number of discrete states: 1 (TSet.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (89): * Single equations (assignments): 86 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.001637/1.417, allocations: 0.6628 MB / 1.577 GB, free: 5.785 MB / 0.9792 GB Notification: Performance of simCode: created initialization part: time 0.004243/1.421, allocations: 1.937 MB / 1.579 GB, free: 3.895 MB / 0.9792 GB Notification: Performance of simCode: created event and clocks part: time 6.482e-06/1.421, allocations: 0 / 1.579 GB, free: 3.895 MB / 0.9792 GB Notification: Performance of simCode: created simulation system equations: time 0.001398/1.423, allocations: 0.6736 MB / 1.58 GB, free: 3.23 MB / 0.9792 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003844/1.427, allocations: 0.8018 MB / 1.58 GB, free: 2.438 MB / 0.9792 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008882/1.436, allocations: 5.262 MB / 1.586 GB, free: 13.11 MB / 0.9948 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001064/1.437, allocations: 1.547 MB / 1.587 GB, free: 11.54 MB / 0.9948 GB Notification: Performance of simCode: alias equations: time 0.002573/1.439, allocations: 0.5029 MB / 1.588 GB, free: 11.03 MB / 0.9948 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006916/1.44, allocations: 163.4 kB / 1.588 GB, free: 10.87 MB / 0.9948 GB Notification: Performance of SimCode: time 8.41e-07/1.44, allocations: 0 / 1.588 GB, free: 10.87 MB / 0.9948 GB Notification: Performance of Templates: time 0.0635/1.503, allocations: 42.79 MB / 1.629 GB, free: 0.582 MB / 1.026 GB make -j1 -f Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.makefile (rm -f Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.pipe ; mkfifo Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.pipe ; head -c 1048576 < Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.pipe >> ../files/Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.sim & ./Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_latest_Buildings.Applications.DataCenters.ChillerCooled.Equipment.Validation.ElectricHeater.pipe 2>&1)