Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad") translateModel(Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001492/0.001492, allocations: 99.17 kB / 16.26 MB, free: 6.418 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001646/0.001646, allocations: 191.2 kB / 17.2 MB, free: 5.953 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.441/1.441, allocations: 205.1 MB / 223.1 MB, free: 12.32 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.742/1.742, allocations: 292.3 MB / 0.5495 GB, free: 17.43 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001456/0.001456, allocations: 67.91 kB / 0.6722 GB, free: 6.598 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2247/0.2262, allocations: 114.5 MB / 0.784 GB, free: 3.938 MB / 0.6544 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad): time 0.4842/0.7104, allocations: 74.39 MB / 0.8567 GB, free: 15.62 MB / 0.67 GB Notification: Performance of NFInst.instExpressions: time 0.04217/0.7526, allocations: 22.24 MB / 0.8784 GB, free: 64 kB / 0.67 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.006403/0.7591, allocations: 97.12 kB / 0.8785 GB, free: 28 kB / 0.67 GB Notification: Performance of NFTyping.typeComponents: time 0.006168/0.7653, allocations: 1.356 MB / 0.8798 GB, free: 15.12 MB / 0.6856 GB Notification: Performance of NFTyping.typeBindings: time 0.01284/0.7782, allocations: 3.001 MB / 0.8827 GB, free: 12.74 MB / 0.6856 GB Notification: Performance of NFTyping.typeClassSections: time 0.008397/0.7866, allocations: 2.146 MB / 0.8848 GB, free: 11.17 MB / 0.6856 GB Notification: Performance of NFFlatten.flatten: time 0.01221/0.7989, allocations: 5.126 MB / 0.8898 GB, free: 8.219 MB / 0.6856 GB Notification: Performance of NFFlatten.resolveConnections: time 0.005086/0.804, allocations: 1.968 MB / 0.8917 GB, free: 6.957 MB / 0.6856 GB Notification: Performance of NFEvalConstants.evaluate: time 0.008521/0.8126, allocations: 2.157 MB / 0.8939 GB, free: 5.676 MB / 0.6856 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004828/0.8174, allocations: 1.509 MB / 0.8953 GB, free: 4.723 MB / 0.6856 GB Notification: Performance of NFPackage.collectConstants: time 0.001062/0.8185, allocations: 205.1 kB / 0.8955 GB, free: 4.723 MB / 0.6856 GB Notification: Performance of NFFlatten.collectFunctions: time 0.007041/0.8256, allocations: 1.826 MB / 0.8973 GB, free: 3.766 MB / 0.6856 GB Notification: Performance of NFScalarize.scalarize: time 0.001486/0.8271, allocations: 0.6408 MB / 0.8979 GB, free: 3.281 MB / 0.6856 GB Notification: Performance of NFVerifyModel.verify: time 0.003104/0.8302, allocations: 1.218 MB / 0.8991 GB, free: 2.434 MB / 0.6856 GB Notification: Performance of NFConvertDAE.convert: time 0.009969/0.8402, allocations: 3.806 MB / 0.9028 GB, free: 15.87 MB / 0.7012 GB Notification: Performance of FrontEnd - DAE generated: time 8.126e-06/0.8403, allocations: 4 kB / 0.9028 GB, free: 15.86 MB / 0.7012 GB Notification: Performance of FrontEnd: time 2.314e-06/0.8403, allocations: 0 / 0.9028 GB, free: 15.86 MB / 0.7012 GB Notification: Performance of Transformations before backend: time 0.0001241/0.8404, allocations: 0 / 0.9028 GB, free: 15.86 MB / 0.7012 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 313 * Number of variables: 313 Notification: Performance of Generate backend data structure: time 0.008246/0.8487, allocations: 2.781 MB / 0.9056 GB, free: 13.81 MB / 0.7012 GB Notification: Performance of prepare preOptimizeDAE: time 5.245e-05/0.8488, allocations: 8.969 kB / 0.9056 GB, free: 13.81 MB / 0.7012 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.006887/0.8557, allocations: 1.011 MB / 0.9066 GB, free: 13.36 MB / 0.7012 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005639/0.8613, allocations: 1.858 MB / 0.9084 GB, free: 11.45 MB / 0.7012 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001161/0.8625, allocations: 311.9 kB / 0.9087 GB, free: 11.14 MB / 0.7012 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0005225/0.8631, allocations: 132 kB / 0.9088 GB, free: 11.01 MB / 0.7012 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00524/0.8683, allocations: 1.903 MB / 0.9107 GB, free: 9.039 MB / 0.7012 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.887e-05/0.8684, allocations: 3.938 kB / 0.9107 GB, free: 9.035 MB / 0.7012 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001724/0.8686, allocations: 55.94 kB / 0.9107 GB, free: 8.98 MB / 0.7012 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.128e-05/0.8686, allocations: 32 kB / 0.9107 GB, free: 8.949 MB / 0.7012 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.006241/0.8749, allocations: 2.037 MB / 0.9127 GB, free: 6.906 MB / 0.7012 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 0.0171/0.892, allocations: 8.176 MB / 0.9207 GB, free: 14.27 MB / 0.7169 GB Notification: Performance of preOpt comSubExp (simulation): time 0.006069/0.8981, allocations: 1.69 MB / 0.9224 GB, free: 12.57 MB / 0.7169 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.002584/0.9008, allocations: 0.7558 MB / 0.9231 GB, free: 11.81 MB / 0.7169 GB Notification: Performance of preOpt evalFunc (simulation): time 0.007817/0.9086, allocations: 3.809 MB / 0.9268 GB, free: 7.695 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.283e-05/0.9087, allocations: 39.06 kB / 0.9269 GB, free: 7.648 MB / 0.7169 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.001266/0.91, allocations: 114.9 kB / 0.927 GB, free: 7.535 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=62): time 6.582e-06/0.91, allocations: 0 / 0.927 GB, free: 7.535 MB / 0.7169 GB Notification: Performance of matching and sorting (n=62): time 0.0157/0.9257, allocations: 3.269 MB / 0.9302 GB, free: 4.234 MB / 0.7169 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.379e-05/0.9259, allocations: 59.97 kB / 0.9302 GB, free: 4.164 MB / 0.7169 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003946/0.9298, allocations: 2.042 MB / 0.9322 GB, free: 2.094 MB / 0.7169 GB Notification: Performance of collectPreVariables (initialization): time 0.0003283/0.9302, allocations: 41.7 kB / 0.9323 GB, free: 2.047 MB / 0.7169 GB Notification: Performance of collectInitialEqns (initialization): time 0.001025/0.9312, allocations: 0.9492 MB / 0.9332 GB, free: 1.086 MB / 0.7169 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003911/0.9316, allocations: 224.8 kB / 0.9334 GB, free: 0.8633 MB / 0.7169 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004784/0.9321, allocations: 238.3 kB / 0.9336 GB, free: 0.6211 MB / 0.7169 GB Notification: Performance of setup shared object (initialization): time 0.0001795/0.9323, allocations: 345.9 kB / 0.9339 GB, free: 284 kB / 0.7169 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.002649/0.9349, allocations: 0.7776 MB / 0.9347 GB, free: 15.5 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002968/0.9379, allocations: 1.118 MB / 0.9358 GB, free: 14.23 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.005136/0.9431, allocations: 1.717 MB / 0.9375 GB, free: 12.39 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.388e-05/0.9431, allocations: 4 kB / 0.9375 GB, free: 12.38 MB / 0.7325 GB Notification: Performance of matching and sorting (n=120) (initialization): time 0.009143/0.9523, allocations: 2.416 MB / 0.9398 GB, free: 9.953 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 4.604e-05/0.9524, allocations: 8 kB / 0.9398 GB, free: 9.945 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.378e-05/0.9524, allocations: 15.94 kB / 0.9399 GB, free: 9.93 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001509/0.9539, allocations: 0.5121 MB / 0.9404 GB, free: 9.418 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001831/0.9558, allocations: 327.5 kB / 0.9407 GB, free: 9.098 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002542/0.9583, allocations: 1.123 MB / 0.9418 GB, free: 7.949 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002909/0.9612, allocations: 210.2 kB / 0.942 GB, free: 7.746 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002577/0.9615, allocations: 67.94 kB / 0.942 GB, free: 7.68 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.003403/0.9649, allocations: 1.123 MB / 0.9431 GB, free: 6.555 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002859/0.9678, allocations: 1.103 MB / 0.9442 GB, free: 5.301 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.004926/0.9728, allocations: 1.679 MB / 0.9459 GB, free: 3.488 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 6.191e-06/0.9728, allocations: 0 / 0.9459 GB, free: 3.488 MB / 0.7325 GB Notification: Performance of matching and sorting (n=120) (initialization_lambda0): time 0.007909/0.9807, allocations: 2.277 MB / 0.9481 GB, free: 1.199 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 3.517e-05/0.9808, allocations: 18.33 kB / 0.9481 GB, free: 1.184 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.34e-05/0.9808, allocations: 8 kB / 0.9481 GB, free: 1.176 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00136/0.9822, allocations: 0.5121 MB / 0.9486 GB, free: 0.6602 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001646/0.9838, allocations: 319.5 kB / 0.9489 GB, free: 356 kB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002464/0.9863, allocations: 1.131 MB / 0.95 GB, free: 15.19 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002907/0.9892, allocations: 208.5 kB / 0.9502 GB, free: 14.99 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002109/0.9895, allocations: 63.95 kB / 0.9503 GB, free: 14.93 MB / 0.7481 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 41 * 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 (112): * Single equations (assignments): 110 * Array equations: 1 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,7)} Notification: Performance of prepare postOptimizeDAE: time 0.0004599/0.9899, allocations: 241 kB / 0.9505 GB, free: 14.68 MB / 0.7481 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005235/0.9905, allocations: 205.5 kB / 0.9507 GB, free: 14.48 MB / 0.7481 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.008342/0.9988, allocations: 2.256 MB / 0.9529 GB, free: 12.22 MB / 0.7481 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.668e-05/0.9989, allocations: 23.86 kB / 0.9529 GB, free: 12.2 MB / 0.7481 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.044e-05/0.9989, allocations: 0 / 0.9529 GB, free: 12.2 MB / 0.7481 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.421e-05/0.9989, allocations: 3.984 kB / 0.9529 GB, free: 12.2 MB / 0.7481 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01206/1.011, allocations: 4.036 MB / 0.9569 GB, free: 8.074 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.159e-05/1.011, allocations: 0 / 0.9569 GB, free: 8.074 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001323/1.012, allocations: 215.9 kB / 0.9571 GB, free: 7.863 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001305/1.014, allocations: 0.4895 MB / 0.9576 GB, free: 7.371 MB / 0.7481 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001076/1.014, allocations: 35.91 kB / 0.9576 GB, free: 7.336 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002579/1.016, allocations: 1.109 MB / 0.9587 GB, free: 6.203 MB / 0.7481 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.969e-06/1.016, allocations: 0 / 0.9587 GB, free: 6.203 MB / 0.7481 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007526/1.024, allocations: 2.084 MB / 0.9607 GB, free: 4.074 MB / 0.7481 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00154/1.026, allocations: 446.1 kB / 0.9611 GB, free: 3.617 MB / 0.7481 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003599/1.026, allocations: 14.75 kB / 0.9611 GB, free: 3.605 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001879/1.028, allocations: 171.8 kB / 0.9613 GB, free: 3.438 MB / 0.7481 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001497/1.028, allocations: 64.36 kB / 0.9614 GB, free: 3.375 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001213/1.028, allocations: 43.94 kB / 0.9614 GB, free: 3.332 MB / 0.7481 GB Notification: Performance of sorting global known variables: time 0.00256/1.031, allocations: 1.435 MB / 0.9628 GB, free: 1.883 MB / 0.7481 GB Notification: Performance of sort global known variables: time 2.11e-07/1.031, allocations: 0 / 0.9628 GB, free: 1.883 MB / 0.7481 GB Notification: Performance of remove unused functions: time 0.003536/1.034, allocations: 0.9904 MB / 0.9638 GB, free: 0.8906 MB / 0.7481 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * 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 (65): * Single equations (assignments): 58 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * When equations: 0 * 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): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,7)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001657/1.036, allocations: 0.5721 MB / 0.9643 GB, free: 340 kB / 0.7481 GB Notification: Performance of simCode: created initialization part: time 0.01075/1.047, allocations: 2.913 MB / 0.9672 GB, free: 13.41 MB / 0.7637 GB Notification: Performance of simCode: created event and clocks part: time 7.574e-06/1.047, allocations: 320 / 0.9672 GB, free: 13.41 MB / 0.7637 GB Notification: Performance of simCode: created simulation system equations: time 0.003346/1.05, allocations: 0.8974 MB / 0.9681 GB, free: 12.52 MB / 0.7637 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005431/1.056, allocations: 0.9479 MB / 0.969 GB, free: 11.64 MB / 0.7637 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.009186/1.065, allocations: 3.701 MB / 0.9726 GB, free: 7.883 MB / 0.7637 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001174/1.066, allocations: 1.457 MB / 0.974 GB, free: 6.395 MB / 0.7637 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0009229/1.067, allocations: 171.3 kB / 0.9742 GB, free: 6.227 MB / 0.7637 GB Notification: Performance of SimCode: time 9.52e-07/1.067, allocations: 0 / 0.9742 GB, free: 6.227 MB / 0.7637 GB Notification: Performance of Templates: time 0.06778/1.135, allocations: 44.78 MB / 1.018 GB, free: 9.812 MB / 0.8106 GB make -j1 -f Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.makefile (rm -f Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.pipe ; mkfifo Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.pipe >> ../files/Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.sim & ./Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.Chillers.Examples.AbsorptionIndirectSteamVaryingLoad.pipe 2>&1)