Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.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.CHPs.BaseClasses.Validation.StandBy,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy") translateModel(Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.002013/0.002014, allocations: 109.4 kB / 15.69 MB, free: 128 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001923/0.001923, allocations: 187.8 kB / 16.62 MB, free: 6.613 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.693/1.693, allocations: 205.1 MB / 222.5 MB, free: 4.555 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.796/1.796, allocations: 292.3 MB / 0.5489 GB, free: 12.76 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 0.001422/0.001422, allocations: 73.92 kB / 0.6723 GB, free: 26.05 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2896/0.291, allocations: 114.5 MB / 0.7841 GB, free: 12.73 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy): time 0.005077/0.2962, allocations: 3.017 MB / 0.7871 GB, free: 9.691 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.00298/0.2992, allocations: 1.721 MB / 0.7888 GB, free: 7.961 MB / 0.6075 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002877/0.2995, allocations: 15.88 kB / 0.7888 GB, free: 7.945 MB / 0.6075 GB Notification: Performance of NFTyping.typeComponents: time 0.001175/0.3007, allocations: 430.7 kB / 0.7892 GB, free: 7.523 MB / 0.6075 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/Utilities/Strings.mo:139:3-175:14:writable] Warning: Pure function 'Modelica.Utilities.Strings.isEmpty' contains a call to impure function 'Modelica.Utilities.Strings.Advanced.skipWhiteSpace'. Notification: Performance of NFTyping.typeBindings: time 0.0005686/0.3013, allocations: 262.7 kB / 0.7894 GB, free: 7.266 MB / 0.6075 GB Notification: Performance of NFTyping.typeClassSections: time 0.001106/0.3024, allocations: 437.3 kB / 0.7898 GB, free: 6.844 MB / 0.6075 GB Notification: Performance of NFFlatten.flatten: time 0.0008661/0.3033, allocations: 0.807 MB / 0.7906 GB, free: 6.035 MB / 0.6075 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0006023/0.3039, allocations: 495.7 kB / 0.7911 GB, free: 5.547 MB / 0.6075 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0003094/0.3042, allocations: 298.9 kB / 0.7914 GB, free: 5.254 MB / 0.6075 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0003496/0.3045, allocations: 314.5 kB / 0.7917 GB, free: 4.945 MB / 0.6075 GB Notification: Performance of NFPackage.collectConstants: time 7.522e-05/0.3046, allocations: 52 kB / 0.7917 GB, free: 4.895 MB / 0.6075 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0002676/0.3049, allocations: 139.9 kB / 0.7919 GB, free: 4.758 MB / 0.6075 GB Notification: Performance of NFScalarize.scalarize: time 0.0002166/0.3051, allocations: 203.3 kB / 0.7921 GB, free: 4.559 MB / 0.6075 GB Notification: Performance of NFVerifyModel.verify: time 0.0002817/0.3054, allocations: 349.8 kB / 0.7924 GB, free: 4.215 MB / 0.6075 GB Notification: Performance of NFConvertDAE.convert: time 0.0008833/0.3063, allocations: 0.8445 MB / 0.7932 GB, free: 3.367 MB / 0.6075 GB Notification: Performance of FrontEnd - DAE generated: time 7.123e-06/0.3063, allocations: 4 kB / 0.7932 GB, free: 3.363 MB / 0.6075 GB Notification: Performance of FrontEnd: time 1.392e-06/0.3063, allocations: 0 / 0.7932 GB, free: 3.363 MB / 0.6075 GB Notification: Performance of Transformations before backend: time 1.041e-05/0.3064, allocations: 0 / 0.7932 GB, free: 3.363 MB / 0.6075 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 119 * Number of variables: 119 Notification: Performance of Generate backend data structure: time 0.001685/0.308, allocations: 1.123 MB / 0.7943 GB, free: 2.172 MB / 0.6075 GB Notification: Performance of prepare preOptimizeDAE: time 3.61e-05/0.3081, allocations: 12.03 kB / 0.7943 GB, free: 2.16 MB / 0.6075 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001588/0.3083, allocations: 95.8 kB / 0.7944 GB, free: 2.066 MB / 0.6075 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0007902/0.309, allocations: 0.5166 MB / 0.7949 GB, free: 1.512 MB / 0.6075 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 9.507e-05/0.3092, allocations: 75.25 kB / 0.795 GB, free: 1.434 MB / 0.6075 GB Notification: Performance of preOpt expandDerOperator (simulation): time 6.888e-05/0.3092, allocations: 55.94 kB / 0.7951 GB, free: 1.379 MB / 0.6075 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008489/0.3101, allocations: 0.5385 MB / 0.7956 GB, free: 0.793 MB / 0.6075 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.631e-05/0.3101, allocations: 11.88 kB / 0.7956 GB, free: 0.7812 MB / 0.6075 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.677e-05/0.3102, allocations: 23.98 kB / 0.7956 GB, free: 0.7578 MB / 0.6075 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.447e-05/0.3102, allocations: 12 kB / 0.7956 GB, free: 0.7461 MB / 0.6075 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005854/0.3108, allocations: 343.7 kB / 0.796 GB, free: 420 kB / 0.6075 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002824/0.3136, allocations: 2.056 MB / 0.798 GB, free: 14.26 MB / 0.6231 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006486/0.3143, allocations: 299 kB / 0.7983 GB, free: 13.96 MB / 0.6231 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002626/0.3146, allocations: 144.8 kB / 0.7984 GB, free: 13.82 MB / 0.6231 GB Notification: Performance of preOpt evalFunc (simulation): time 5.011e-05/0.3146, allocations: 8 kB / 0.7984 GB, free: 13.81 MB / 0.6231 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004649/0.3151, allocations: 218.7 kB / 0.7986 GB, free: 13.58 MB / 0.6231 GB Notification: Performance of pre-optimization done (n=41): time 2.535e-06/0.3151, allocations: 0 / 0.7986 GB, free: 13.58 MB / 0.6231 GB Notification: Performance of matching and sorting (n=41): time 0.001105/0.3162, allocations: 468.7 kB / 0.7991 GB, free: 13.12 MB / 0.6231 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001278/0.3164, allocations: 106.8 kB / 0.7992 GB, free: 12.99 MB / 0.6231 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001012/0.3174, allocations: 0.7579 MB / 0.7999 GB, free: 12.22 MB / 0.6231 GB Notification: Performance of collectPreVariables (initialization): time 5.206e-05/0.3174, allocations: 49.69 kB / 0.7999 GB, free: 12.17 MB / 0.6231 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003919/0.3178, allocations: 380.5 kB / 0.8003 GB, free: 11.79 MB / 0.6231 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001031/0.3179, allocations: 102.7 kB / 0.8004 GB, free: 11.69 MB / 0.6231 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002121/0.3182, allocations: 142.2 kB / 0.8005 GB, free: 11.54 MB / 0.6231 GB Notification: Performance of setup shared object (initialization): time 0.0001747/0.3183, allocations: 329.9 kB / 0.8009 GB, free: 11.21 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000278/0.3186, allocations: 137.2 kB / 0.801 GB, free: 11.08 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004041/0.319, allocations: 318.3 kB / 0.8013 GB, free: 10.69 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0005368/0.3196, allocations: 377.2 kB / 0.8016 GB, free: 10.26 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.158e-06/0.3196, allocations: 0 / 0.8016 GB, free: 10.26 MB / 0.6231 GB Notification: Performance of matching and sorting (n=73) (initialization): time 0.0008133/0.3204, allocations: 0.5104 MB / 0.8021 GB, free: 9.746 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 2.363e-05/0.3205, allocations: 8 kB / 0.8022 GB, free: 9.738 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.025e-05/0.3205, allocations: 4 kB / 0.8022 GB, free: 9.734 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.094e-05/0.3205, allocations: 8.594 kB / 0.8022 GB, free: 9.727 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002536/0.3208, allocations: 71.84 kB / 0.8022 GB, free: 9.656 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.947e-05/0.3208, allocations: 15.92 kB / 0.8022 GB, free: 9.641 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002675/0.3211, allocations: 59.42 kB / 0.8023 GB, free: 9.582 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.3e-05/0.3211, allocations: 24 kB / 0.8023 GB, free: 9.559 MB / 0.6231 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 20 * Number of states: 0 () * Number of discrete variables: 52 ($PRE.transition1.enableFire,$PRE.transition2.enableFire,$PRE.transition3.enableFire,$PRE.transition4.enableFire,$PRE.runSig.combiTimeTable.nextTimeEvent,$whenCondition2,$PRE.avaSig.combiTimeTable.nextTimeEvent,$whenCondition1,stateGraphRoot.resume,stateGraphRoot.suspend,transition3.localCondition,transition4.enableFire,transition3.t_start,$PRE.transition3.t_start,transition3.enableFire,stateGraphRoot.activeSteps,off.oldActive,$PRE.off.oldActive,off.newActive,$PRE.off.newActive,off.inPort[2].occupied,off.localActive,$PRE.off.localActive,off.active,runSig.combiTimeTable.nextTimeEventScaled,$PRE.runSig.combiTimeTable.nextTimeEventScaled,runSig.combiTimeTable.nextTimeEvent,avaSig.combiTimeTable.nextTimeEventScaled,$PRE.avaSig.combiTimeTable.nextTimeEventScaled,avaSig.combiTimeTable.nextTimeEvent,pumOn.oldActive,$PRE.pumOn.oldActive,pumOn.newActive,$PRE.pumOn.newActive,pumOn.outPort[1].reset,pumOn.localActive,$PRE.pumOn.localActive,pumOn.active,staBy.oldActive,$PRE.staBy.oldActive,staBy.newActive,$PRE.staBy.newActive,staBy.outPort[2].available,staBy.localActive,$PRE.staBy.localActive,staBy.active,transition2.enableFire,transition2.localCondition,transition1.enableFire,transition1.localCondition,actMod,$whenCondition3) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (73): * Single equations (assignments): 73 * 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 0.0003237/0.3214, allocations: 275.5 kB / 0.8026 GB, free: 9.281 MB / 0.6231 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 9.39e-05/0.3215, allocations: 75.08 kB / 0.8027 GB, free: 9.207 MB / 0.6231 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0008068/0.3224, allocations: 435.9 kB / 0.8031 GB, free: 8.773 MB / 0.6231 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.593e-06/0.3224, allocations: 4 kB / 0.8031 GB, free: 8.77 MB / 0.6231 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.336e-06/0.3224, allocations: 0 / 0.8031 GB, free: 8.77 MB / 0.6231 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.764e-06/0.3224, allocations: 0 / 0.8031 GB, free: 8.77 MB / 0.6231 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001638/0.324, allocations: 1.068 MB / 0.8041 GB, free: 7.645 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.595e-06/0.3241, allocations: 0 / 0.8041 GB, free: 7.645 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001136/0.3242, allocations: 27.92 kB / 0.8042 GB, free: 7.617 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.921e-06/0.3242, allocations: 4 kB / 0.8042 GB, free: 7.613 MB / 0.6231 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.675e-05/0.3242, allocations: 15.98 kB / 0.8042 GB, free: 7.598 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 7.795e-06/0.3243, allocations: 7.938 kB / 0.8042 GB, free: 7.59 MB / 0.6231 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.004e-06/0.3243, allocations: 0 / 0.8042 GB, free: 7.59 MB / 0.6231 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006765/0.3249, allocations: 492 kB / 0.8046 GB, free: 7.09 MB / 0.6231 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001149/0.3251, allocations: 140.2 kB / 0.8048 GB, free: 6.934 MB / 0.6231 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7e-05/0.3251, allocations: 11.98 kB / 0.8048 GB, free: 6.922 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001752/0.3253, allocations: 19.94 kB / 0.8048 GB, free: 6.902 MB / 0.6231 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001179/0.3254, allocations: 43.94 kB / 0.8049 GB, free: 6.859 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.127e-05/0.3255, allocations: 19.98 kB / 0.8049 GB, free: 6.84 MB / 0.6231 GB Notification: Performance of sorting global known variables: time 0.0005658/0.3261, allocations: 0.499 MB / 0.8054 GB, free: 6.344 MB / 0.6231 GB Notification: Performance of sort global known variables: time 1.7e-07/0.3261, allocations: 3.938 kB / 0.8054 GB, free: 6.34 MB / 0.6231 GB Notification: Performance of remove unused functions: time 0.0004878/0.3266, allocations: 143.5 kB / 0.8055 GB, free: 6.199 MB / 0.6231 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 36 (transition3.enableFire,off.active,pumOn.active,staBy.active,$cse1,$cse2,$cse3,$cse4,$cse5,$whenCondition3,$whenCondition2,$whenCondition1,actMod,transition1.localCondition,transition1.enableFire,transition2.localCondition,transition2.enableFire,staBy.localActive,staBy.outPort[2].available,staBy.newActive,staBy.oldActive,pumOn.localActive,pumOn.outPort[1].reset,pumOn.newActive,pumOn.oldActive,avaSig.combiTimeTable.nextTimeEvent,avaSig.combiTimeTable.nextTimeEventScaled,runSig.combiTimeTable.nextTimeEvent,runSig.combiTimeTable.nextTimeEventScaled,off.localActive,off.inPort[2].occupied,off.newActive,off.oldActive,stateGraphRoot.activeSteps,transition3.t_start,transition4.enableFire) * Number of discrete states: 7 (runSig.combiTimeTable.nextTimeEvent,avaSig.combiTimeTable.nextTimeEvent,staBy.newActive,pumOn.newActive,off.newActive,runSig.combiTimeTable.nextTimeEventScaled,avaSig.combiTimeTable.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (46): * Single equations (assignments): 38 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 8 * 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 0.001131/0.3277, allocations: 468.8 kB / 0.8059 GB, free: 5.895 MB / 0.6231 GB Notification: Performance of simCode: created initialization part: time 0.00071/0.3285, allocations: 374.7 kB / 0.8063 GB, free: 5.523 MB / 0.6231 GB Notification: Performance of simCode: created event and clocks part: time 2.735e-06/0.3285, allocations: 0 / 0.8063 GB, free: 5.523 MB / 0.6231 GB Notification: Performance of simCode: created simulation system equations: time 0.0002992/0.3288, allocations: 180.5 kB / 0.8065 GB, free: 5.348 MB / 0.6231 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0006456/0.3294, allocations: 132.8 kB / 0.8066 GB, free: 5.227 MB / 0.6231 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001842/0.3313, allocations: 1.194 MB / 0.8078 GB, free: 4 MB / 0.6231 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005626/0.3319, allocations: 0.9537 MB / 0.8087 GB, free: 3.02 MB / 0.6231 GB Notification: Performance of simCode: alias equations: time 0.000268/0.3321, allocations: 100.8 kB / 0.8088 GB, free: 2.918 MB / 0.6231 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001255/0.3323, allocations: 55.42 kB / 0.8088 GB, free: 2.867 MB / 0.6231 GB Notification: Performance of SimCode: time 3.11e-07/0.3323, allocations: 0 / 0.8088 GB, free: 2.867 MB / 0.6231 GB Notification: Performance of Templates: time 0.01315/0.3454, allocations: 6.615 MB / 0.8153 GB, free: 12.32 MB / 0.6387 GB make -j1 -f Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.makefile (rm -f Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.pipe ; mkfifo Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.pipe >> ../files/Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.sim & ./Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.CHPs.BaseClasses.Validation.StandBy.pipe 2>&1)