Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.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.FixedResistances.BaseClasses.Validation.PlugFlowCore,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore") translateModel(Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001252/0.001252, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002107/0.002107, allocations: 196.4 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.636/1.636, allocations: 205.1 MB / 222.4 MB, free: 4.605 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 1.74/1.74, allocations: 292.3 MB / 0.5489 GB, free: 12.87 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 0.002227/0.002227, allocations: 66.72 kB / 0.6715 GB, free: 26.16 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2699/0.2722, allocations: 114.5 MB / 0.7834 GB, free: 13.51 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore): time 0.03611/0.3084, allocations: 33.45 MB / 0.816 GB, free: 11.92 MB / 0.6387 GB Notification: Performance of NFInst.instExpressions: time 0.01371/0.3221, allocations: 9.773 MB / 0.8256 GB, free: 2.121 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001159/0.3233, allocations: 27.81 kB / 0.8256 GB, free: 2.094 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.001205/0.3246, allocations: 413.2 kB / 0.826 GB, free: 1.688 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.003917/0.3285, allocations: 1.403 MB / 0.8274 GB, free: 284 kB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.00283/0.3314, allocations: 0.9413 MB / 0.8283 GB, free: 15.34 MB / 0.6544 GB Notification: Performance of NFFlatten.flatten: time 0.002822/0.3342, allocations: 2.024 MB / 0.8303 GB, free: 13.3 MB / 0.6544 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001121/0.3353, allocations: 0.6168 MB / 0.8309 GB, free: 12.68 MB / 0.6544 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002146/0.3375, allocations: 0.9571 MB / 0.8318 GB, free: 11.72 MB / 0.6544 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00118/0.3387, allocations: 0.6263 MB / 0.8324 GB, free: 11.09 MB / 0.6544 GB Notification: Performance of NFPackage.collectConstants: time 0.0002132/0.3389, allocations: 68 kB / 0.8325 GB, free: 11.02 MB / 0.6544 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002951/0.3419, allocations: 1.326 MB / 0.8338 GB, free: 9.695 MB / 0.6544 GB Notification: Performance of NFScalarize.scalarize: time 0.000231/0.3421, allocations: 183.3 kB / 0.8339 GB, free: 9.516 MB / 0.6544 GB Notification: Performance of NFVerifyModel.verify: time 0.0006567/0.3428, allocations: 441.9 kB / 0.8344 GB, free: 9.082 MB / 0.6544 GB Notification: Performance of NFConvertDAE.convert: time 0.002744/0.3455, allocations: 1.632 MB / 0.836 GB, free: 7.445 MB / 0.6544 GB Notification: Performance of FrontEnd - DAE generated: time 5.049e-06/0.3455, allocations: 0 / 0.836 GB, free: 7.445 MB / 0.6544 GB Notification: Performance of FrontEnd: time 3.376e-06/0.3455, allocations: 4 kB / 0.836 GB, free: 7.441 MB / 0.6544 GB Notification: Performance of Transformations before backend: time 1.149e-05/0.3456, allocations: 0 / 0.836 GB, free: 7.441 MB / 0.6544 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 111 * Number of variables: 111 Notification: Performance of Generate backend data structure: time 0.00238/0.348, allocations: 1.234 MB / 0.8372 GB, free: 6.156 MB / 0.6544 GB Notification: Performance of prepare preOptimizeDAE: time 4.083e-05/0.348, allocations: 12.03 kB / 0.8372 GB, free: 6.145 MB / 0.6544 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001752/0.3482, allocations: 87.91 kB / 0.8373 GB, free: 6.059 MB / 0.6544 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009971/0.3492, allocations: 0.6445 MB / 0.8379 GB, free: 5.371 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.677e-05/0.3492, allocations: 41 kB / 0.8379 GB, free: 5.332 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.842e-05/0.3493, allocations: 51.94 kB / 0.838 GB, free: 5.281 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007759/0.3501, allocations: 430.4 kB / 0.8384 GB, free: 4.855 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.799e-05/0.3501, allocations: 0 / 0.8384 GB, free: 4.855 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.42e-05/0.3502, allocations: 20 kB / 0.8384 GB, free: 4.836 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.684e-05/0.3502, allocations: 12 kB / 0.8384 GB, free: 4.824 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0007114/0.3509, allocations: 363.8 kB / 0.8388 GB, free: 4.469 MB / 0.6544 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 0.003756/0.3547, allocations: 2.775 MB / 0.8415 GB, free: 1.41 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.000834/0.3555, allocations: 375.7 kB / 0.8418 GB, free: 1.035 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002977/0.3559, allocations: 157.1 kB / 0.842 GB, free: 0.8789 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.00132/0.3572, allocations: 1.425 MB / 0.8434 GB, free: 15.14 MB / 0.67 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.899e-05/0.3572, allocations: 34.78 kB / 0.8434 GB, free: 15.1 MB / 0.67 GB Notification: Performance of pre-optimization done (n=35): time 2.625e-06/0.3572, allocations: 0 / 0.8434 GB, free: 15.1 MB / 0.67 GB Notification: Performance of matching and sorting (n=35): time 0.001156/0.3584, allocations: 0.4909 MB / 0.8439 GB, free: 14.6 MB / 0.67 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.739e-05/0.3585, allocations: 55.41 kB / 0.8439 GB, free: 14.54 MB / 0.67 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009578/0.3594, allocations: 0.7391 MB / 0.8447 GB, free: 13.79 MB / 0.67 GB Notification: Performance of collectPreVariables (initialization): time 3.469e-05/0.3595, allocations: 29.7 kB / 0.8447 GB, free: 13.75 MB / 0.67 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002739/0.3598, allocations: 332.2 kB / 0.845 GB, free: 13.42 MB / 0.67 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001108/0.3599, allocations: 130.1 kB / 0.8451 GB, free: 13.29 MB / 0.67 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000137/0.36, allocations: 93.95 kB / 0.8452 GB, free: 13.2 MB / 0.67 GB Notification: Performance of setup shared object (initialization): time 0.0001356/0.3602, allocations: 325.9 kB / 0.8455 GB, free: 12.87 MB / 0.67 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002842/0.3605, allocations: 134.3 kB / 0.8457 GB, free: 12.74 MB / 0.67 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003804/0.3608, allocations: 209.3 kB / 0.8459 GB, free: 12.51 MB / 0.67 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0006324/0.3615, allocations: 326.1 kB / 0.8462 GB, free: 12.18 MB / 0.67 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.665e-06/0.3615, allocations: 4 kB / 0.8462 GB, free: 12.17 MB / 0.67 GB Notification: Performance of matching and sorting (n=48) (initialization): time 0.0009052/0.3624, allocations: 461.9 kB / 0.8466 GB, free: 11.71 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 2.074e-05/0.3624, allocations: 8 kB / 0.8466 GB, free: 11.71 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.293e-05/0.3625, allocations: 7.984 kB / 0.8466 GB, free: 11.7 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.232e-05/0.3625, allocations: 0 / 0.8466 GB, free: 11.7 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004873/0.363, allocations: 100 kB / 0.8467 GB, free: 11.6 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0003917/0.3634, allocations: 0.6015 MB / 0.8473 GB, free: 10.98 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004625/0.3639, allocations: 55.42 kB / 0.8474 GB, free: 10.92 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.469e-05/0.3639, allocations: 23.98 kB / 0.8474 GB, free: 10.9 MB / 0.67 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0004826/0.3644, allocations: 273.5 kB / 0.8476 GB, free: 10.63 MB / 0.67 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0003333/0.3648, allocations: 201.7 kB / 0.8478 GB, free: 10.41 MB / 0.67 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0005805/0.3653, allocations: 340.8 kB / 0.8482 GB, free: 10.06 MB / 0.67 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.105e-06/0.3654, allocations: 3.984 kB / 0.8482 GB, free: 10.06 MB / 0.67 GB Notification: Performance of matching and sorting (n=48) (initialization_lambda0): time 0.0009223/0.3663, allocations: 460 kB / 0.8486 GB, free: 9.602 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 1.457e-05/0.3663, allocations: 7.984 kB / 0.8486 GB, free: 9.594 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.42e-05/0.3663, allocations: 8.156 kB / 0.8486 GB, free: 9.586 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.272e-06/0.3663, allocations: 4 kB / 0.8486 GB, free: 9.582 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003268/0.3667, allocations: 95.81 kB / 0.8487 GB, free: 9.488 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.697e-06/0.3667, allocations: 3.938 kB / 0.8487 GB, free: 9.484 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004065/0.3671, allocations: 35.77 kB / 0.8488 GB, free: 9.449 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.693e-05/0.3672, allocations: 23.98 kB / 0.8488 GB, free: 9.426 MB / 0.67 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * 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 (46): * Single equations (assignments): 43 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0001823/0.3674, allocations: 203.2 kB / 0.849 GB, free: 9.223 MB / 0.67 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001391/0.3675, allocations: 75.06 kB / 0.849 GB, free: 9.148 MB / 0.67 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001522/0.369, allocations: 0.8149 MB / 0.8498 GB, free: 8.348 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.156e-05/0.3691, allocations: 11.98 kB / 0.8499 GB, free: 8.336 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.09e-06/0.3691, allocations: 3.938 kB / 0.8499 GB, free: 8.332 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.713e-06/0.3691, allocations: 0 / 0.8499 GB, free: 8.332 MB / 0.67 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002222/0.3713, allocations: 1.458 MB / 0.8513 GB, free: 6.809 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.605e-05/0.3713, allocations: 7.984 kB / 0.8513 GB, free: 6.801 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003656/0.3717, allocations: 79.89 kB / 0.8514 GB, free: 6.723 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.686e-06/0.3717, allocations: 4 kB / 0.8514 GB, free: 6.719 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.726e-05/0.3718, allocations: 15.98 kB / 0.8514 GB, free: 6.703 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0003532/0.3721, allocations: 0.5937 MB / 0.852 GB, free: 6.086 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.515e-06/0.3721, allocations: 0 / 0.852 GB, free: 6.086 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001582/0.3737, allocations: 0.9847 MB / 0.8529 GB, free: 5.066 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004052/0.3742, allocations: 231.9 kB / 0.8531 GB, free: 4.82 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001137/0.3743, allocations: 8 kB / 0.8532 GB, free: 4.812 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003682/0.3746, allocations: 23.98 kB / 0.8532 GB, free: 4.789 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001464/0.3748, allocations: 48.31 kB / 0.8532 GB, free: 4.742 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.682e-05/0.3749, allocations: 19.98 kB / 0.8532 GB, free: 4.723 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.0008423/0.3757, allocations: 0.5186 MB / 0.8537 GB, free: 4.207 MB / 0.67 GB Notification: Performance of sort global known variables: time 1.6e-07/0.3757, allocations: 0 / 0.8537 GB, free: 4.207 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.001397/0.3771, allocations: 459.5 kB / 0.8542 GB, free: 3.758 MB / 0.67 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 4 (pip.del.x,pip.timDel.x,senTemOut.T,senTemIn.T) * 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 (52): * Single equations (assignments): 37 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 14 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.001112/0.3783, allocations: 475.3 kB / 0.8546 GB, free: 3.297 MB / 0.67 GB Notification: Performance of simCode: created initialization part: time 0.001913/0.3802, allocations: 0.7645 MB / 0.8554 GB, free: 2.512 MB / 0.67 GB Notification: Performance of simCode: created event and clocks part: time 3.848e-06/0.3802, allocations: 0 / 0.8554 GB, free: 2.512 MB / 0.67 GB Notification: Performance of simCode: created simulation system equations: time 0.0005727/0.3808, allocations: 349.9 kB / 0.8557 GB, free: 2.152 MB / 0.67 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001982/0.3828, allocations: 402.5 kB / 0.8561 GB, free: 1.773 MB / 0.67 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002663/0.3854, allocations: 1.495 MB / 0.8576 GB, free: 252 kB / 0.67 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005845/0.3861, allocations: 0.9353 MB / 0.8585 GB, free: 15.29 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.0008895/0.387, allocations: 216.4 kB / 0.8587 GB, free: 15.09 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001787/0.3871, allocations: 75.41 kB / 0.8588 GB, free: 15.01 MB / 0.6856 GB Notification: Performance of SimCode: time 1.122e-06/0.3872, allocations: 0 / 0.8588 GB, free: 15.01 MB / 0.6856 GB Notification: Performance of Templates: time 0.03312/0.4203, allocations: 19.76 MB / 0.878 GB, free: 11.54 MB / 0.7012 GB make -j1 -f Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.makefile (rm -f Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe ; mkfifo Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe >> ../files/Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.sim & ./Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.FixedResistances.BaseClasses.Validation.PlugFlowCore.pipe 2>&1)