Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater.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 4.0.0+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.1-master/package.mo", uses=false)
Using package Buildings with version 11.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.1-master/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 ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo)
Running command: "" <> buildModelFMU(Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater,fileNamePrefix="Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_CoupledVolumesWater",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater,fileNamePrefix="Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_CoupledVolumesWater",fmuType="me",version="2.0",platforms={"static"})
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001016/0.001016, 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 0.001034/0.001034, allocations: 194.3 kB / 16.53 MB, free: 6.664 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.277/1.277, allocations: 222.9 MB / 240.2 MB, free: 4.418 MB / 190.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.1-master/package.mo): time 2.525/2.525, allocations: 461.9 MB / 0.7347 GB, free: 14.77 MB / 0.5919 GB
Notification: Performance of FrontEnd - loaded program: time 0.00115/0.00115, allocations: 65.06 kB / 0.8992 GB, free: 37 MB / 0.7169 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2456/0.2468, allocations: 157.4 MB / 1.053 GB, free: 8.285 MB / 0.8106 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater): time 0.02258/0.2694, allocations: 26.29 MB / 1.079 GB, free: 13.9 MB / 0.8419 GB
Notification: Performance of NFInst.instExpressions: time 0.008403/0.2779, allocations: 7.141 MB / 1.086 GB, free: 6.742 MB / 0.8419 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0005674/0.2784, allocations: 35.81 kB / 1.086 GB, free: 6.707 MB / 0.8419 GB
Notification: Performance of NFTyping.typeComponents: time 0.0007792/0.2793, allocations: 377.5 kB / 1.086 GB, free: 6.336 MB / 0.8419 GB
Notification: Performance of NFTyping.typeBindings: time 0.001947/0.2812, allocations: 1.116 MB / 1.087 GB, free: 5.215 MB / 0.8419 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001798/0.283, allocations: 0.9341 MB / 1.088 GB, free: 4.289 MB / 0.8419 GB
Notification: Performance of NFFlatten.flatten: time 0.001774/0.2848, allocations: 2.085 MB / 1.09 GB, free: 2.191 MB / 0.8419 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0006347/0.2855, allocations: 0.6257 MB / 1.091 GB, free: 1.555 MB / 0.8419 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.001162/0.2866, allocations: 0.7153 MB / 1.091 GB, free: 0.8477 MB / 0.8419 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0005418/0.2872, allocations: 0.5366 MB / 1.092 GB, free: 316 kB / 0.8419 GB
Notification: Performance of NFPackage.collectConstants: time 8.751e-05/0.2873, allocations: 52 kB / 1.092 GB, free: 264 kB / 0.8419 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.001229/0.2885, allocations: 0.811 MB / 1.093 GB, free: 15.45 MB / 0.8575 GB
Notification: Performance of NFScalarize.scalarize: time 0.0001559/0.2887, allocations: 175.4 kB / 1.093 GB, free: 15.27 MB / 0.8575 GB
Notification: Performance of NFVerifyModel.verify: time 0.0003094/0.289, allocations: 378.2 kB / 1.093 GB, free: 14.9 MB / 0.8575 GB
Notification: Performance of NFConvertDAE.convert: time 0.001219/0.2902, allocations: 1.196 MB / 1.094 GB, free: 13.7 MB / 0.8575 GB
Notification: Performance of FrontEnd - DAE generated: time 3.146e-06/0.2902, allocations: 0 / 1.094 GB, free: 13.7 MB / 0.8575 GB
Notification: Performance of FrontEnd: time 1.112e-06/0.2902, allocations: 8 kB / 1.094 GB, free: 13.7 MB / 0.8575 GB
Notification: Performance of Transformations before backend: time 7.875e-06/0.2903, allocations: 0 / 1.094 GB, free: 13.7 MB / 0.8575 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 110
 * Number of variables: 110
Notification: Performance of Generate backend data structure: time 0.001178/0.2914, allocations: 1.051 MB / 1.095 GB, free: 12.59 MB / 0.8575 GB
Notification: Performance of prepare preOptimizeDAE: time 3.164e-05/0.2915, allocations: 8.625 kB / 1.095 GB, free: 12.59 MB / 0.8575 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 8.17e-05/0.2916, allocations: 86.7 kB / 1.095 GB, free: 12.49 MB / 0.8575 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002451/0.2918, allocations: 84 kB / 1.096 GB, free: 12.41 MB / 0.8575 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009099/0.2927, allocations: 0.7097 MB / 1.096 GB, free: 11.66 MB / 0.8575 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.753e-05/0.2928, allocations: 33 kB / 1.096 GB, free: 11.62 MB / 0.8575 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 6.372e-05/0.2928, allocations: 47.91 kB / 1.096 GB, free: 11.58 MB / 0.8575 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0006551/0.2935, allocations: 0.504 MB / 1.097 GB, free: 11.04 MB / 0.8575 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.53e-05/0.2935, allocations: 3.984 kB / 1.097 GB, free: 11.04 MB / 0.8575 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.867e-05/0.2936, allocations: 27.92 kB / 1.097 GB, free: 11.01 MB / 0.8575 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.051e-05/0.2936, allocations: 12 kB / 1.097 GB, free: 11 MB / 0.8575 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004615/0.2941, allocations: 323.7 kB / 1.097 GB, free: 10.68 MB / 0.8575 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 0.002367/0.2964, allocations: 2.764 MB / 1.1 GB, free: 7.68 MB / 0.8575 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0002697/0.2967, allocations: 186.5 kB / 1.1 GB, free: 7.488 MB / 0.8575 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001221/0.2969, allocations: 96.81 kB / 1.1 GB, free: 7.391 MB / 0.8575 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0002695/0.2971, allocations: 340.8 kB / 1.1 GB, free: 6.984 MB / 0.8575 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.674e-05/0.2972, allocations: 50.44 kB / 1.1 GB, free: 6.926 MB / 0.8575 GB
Notification: Performance of pre-optimization done (n=22): time 1.303e-06/0.2972, allocations: 0 / 1.1 GB, free: 6.926 MB / 0.8575 GB
Notification: Performance of matching and sorting (n=22): time 0.0004798/0.2977, allocations: 303.3 kB / 1.101 GB, free: 6.625 MB / 0.8575 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.344e-05/0.2977, allocations: 51.41 kB / 1.101 GB, free: 6.562 MB / 0.8575 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005142/0.2982, allocations: 0.5302 MB / 1.101 GB, free: 6.023 MB / 0.8575 GB
Notification: Performance of collectPreVariables (initialization): time 2.764e-05/0.2983, allocations: 29.7 kB / 1.101 GB, free: 5.988 MB / 0.8575 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0002104/0.2985, allocations: 347.3 kB / 1.102 GB, free: 5.645 MB / 0.8575 GB
Notification: Performance of collectInitialBindings (initialization): time 5.699e-05/0.2985, allocations: 82.92 kB / 1.102 GB, free: 5.562 MB / 0.8575 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 9.202e-05/0.2986, allocations: 85.59 kB / 1.102 GB, free: 5.473 MB / 0.8575 GB
Notification: Performance of setup shared object (initialization): time 0.0001268/0.2988, allocations: 358.8 kB / 1.102 GB, free: 5.113 MB / 0.8575 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001381/0.2989, allocations: 96.77 kB / 1.102 GB, free: 5.016 MB / 0.8575 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002261/0.2991, allocations: 233.9 kB / 1.103 GB, free: 4.723 MB / 0.8575 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0003556/0.2995, allocations: 341.2 kB / 1.103 GB, free: 4.332 MB / 0.8575 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.545e-06/0.2995, allocations: 4 kB / 1.103 GB, free: 4.328 MB / 0.8575 GB
Notification: Performance of matching and sorting (n=44) (initialization): time 0.0005108/0.3, allocations: 388.2 kB / 1.103 GB, free: 3.945 MB / 0.8575 GB
Notification: Performance of prepare postOptimizeDAE: time 1.265e-05/0.3001, allocations: 12.5 kB / 1.103 GB, free: 3.934 MB / 0.8575 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.939e-06/0.3001, allocations: 7.984 kB / 1.103 GB, free: 3.926 MB / 0.8575 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.314e-05/0.3001, allocations: 11.94 kB / 1.103 GB, free: 3.914 MB / 0.8575 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002309/0.3003, allocations: 71.91 kB / 1.103 GB, free: 3.844 MB / 0.8575 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.068e-05/0.3003, allocations: 11.94 kB / 1.103 GB, free: 3.832 MB / 0.8575 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002974/0.3006, allocations: 43.58 kB / 1.103 GB, free: 3.789 MB / 0.8575 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.692e-05/0.3007, allocations: 16 kB / 1.103 GB, free: 3.773 MB / 0.8575 GB
Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0002604/0.3009, allocations: 248 kB / 1.104 GB, free: 3.527 MB / 0.8575 GB
Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0002125/0.3012, allocations: 238.6 kB / 1.104 GB, free: 3.23 MB / 0.8575 GB
Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.000348/0.3015, allocations: 339.9 kB / 1.104 GB, free: 2.84 MB / 0.8575 GB
Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.703e-06/0.3015, allocations: 0 / 1.104 GB, free: 2.84 MB / 0.8575 GB
Notification: Performance of matching and sorting (n=44) (initialization_lambda0): time 0.0004929/0.302, allocations: 386.3 kB / 1.105 GB, free: 2.457 MB / 0.8575 GB
Notification: Performance of prepare postOptimizeDAE: time 1.534e-05/0.302, allocations: 8 kB / 1.105 GB, free: 2.449 MB / 0.8575 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.877e-06/0.3021, allocations: 4 kB / 1.105 GB, free: 2.445 MB / 0.8575 GB
Notification: Performance of postOpt tearingSystem (initialization): time 5.721e-06/0.3021, allocations: 7.984 kB / 1.105 GB, free: 2.438 MB / 0.8575 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002052/0.3023, allocations: 72 kB / 1.105 GB, free: 2.367 MB / 0.8575 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.041e-05/0.3023, allocations: 15.88 kB / 1.105 GB, free: 2.352 MB / 0.8575 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000284/0.3026, allocations: 43.66 kB / 1.105 GB, free: 2.309 MB / 0.8575 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.31e-05/0.3026, allocations: 16 kB / 1.105 GB, free: 2.293 MB / 0.8575 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 19
 * 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 (44):
 * Single equations (assignments): 44
 * 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 0.0001056/0.3027, allocations: 200.8 kB / 1.105 GB, free: 2.09 MB / 0.8575 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 9.549e-05/0.3028, allocations: 59.28 kB / 1.105 GB, free: 2.031 MB / 0.8575 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.000432/0.3033, allocations: 282.4 kB / 1.105 GB, free: 1.746 MB / 0.8575 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.602e-06/0.3033, allocations: 7.938 kB / 1.105 GB, free: 1.738 MB / 0.8575 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 4.718e-06/0.3033, allocations: 3.984 kB / 1.105 GB, free: 1.734 MB / 0.8575 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0003117/0.3036, allocations: 380.2 kB / 1.106 GB, free: 1.316 MB / 0.8575 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001199/0.3048, allocations: 1.058 MB / 1.107 GB, free: 160 kB / 0.8575 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.009e-06/0.3048, allocations: 8 kB / 1.107 GB, free: 152 kB / 0.8575 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001883/0.305, allocations: 56.19 kB / 1.107 GB, free: 96 kB / 0.8575 GB
Notification: Performance of postOpt tearingSystem (simulation): time 4.197e-06/0.305, allocations: 4 kB / 1.107 GB, free: 92 kB / 0.8575 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.717e-05/0.3051, allocations: 8 kB / 1.107 GB, free: 84 kB / 0.8575 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.899e-06/0.3051, allocations: 7.984 kB / 1.107 GB, free: 76 kB / 0.8575 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.206e-06/0.3051, allocations: 3.938 kB / 1.107 GB, free: 72 kB / 0.8575 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0005548/0.3056, allocations: 0.5182 MB / 1.107 GB, free: 15.51 MB / 0.8731 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0001724/0.3058, allocations: 168.4 kB / 1.107 GB, free: 15.32 MB / 0.8731 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.701e-05/0.3059, allocations: 8 kB / 1.107 GB, free: 15.32 MB / 0.8731 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003103/0.3062, allocations: 20.05 kB / 1.107 GB, free: 15.3 MB / 0.8731 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 3.199e-05/0.3062, allocations: 23.92 kB / 1.107 GB, free: 15.27 MB / 0.8731 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.478e-05/0.3063, allocations: 11.98 kB / 1.107 GB, free: 15.26 MB / 0.8731 GB
Notification: Performance of sorting global known variables: time 0.0004008/0.3067, allocations: 419 kB / 1.108 GB, free: 14.85 MB / 0.8731 GB
Notification: Performance of sort global known variables: time 1.51e-07/0.3067, allocations: 0 / 1.108 GB, free: 14.85 MB / 0.8731 GB
Notification: Performance of remove unused functions: time 0.0008245/0.3075, allocations: 347.3 kB / 1.108 GB, free: 14.51 MB / 0.8731 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 10
 * Number of states: 2 (vol.dynBal.U,vol1.dynBal.U)
 * 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 (25):
 * Single equations (assignments): 24
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 1
 * When equations: 0
 * 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 0.09421/0.4017, allocations: 1.265 MB / 1.109 GB, free: 13.2 MB / 0.8731 GB
Notification: Performance of simCode: created initialization part: time 0.001446/0.4032, allocations: 413.9 kB / 1.11 GB, free: 12.8 MB / 0.8731 GB
Notification: Performance of simCode: created event and clocks part: time 7.674e-06/0.4033, allocations: 0 / 1.11 GB, free: 12.8 MB / 0.8731 GB
Notification: Performance of simCode: created simulation system equations: time 0.0002823/0.4036, allocations: 115.9 kB / 1.11 GB, free: 12.69 MB / 0.8731 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003257/0.4068, allocations: 371.3 kB / 1.11 GB, free: 12.34 MB / 0.8731 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008743/0.4156, allocations: 4.538 MB / 1.115 GB, free: 7.559 MB / 0.8731 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007029/0.4163, allocations: 0.9056 MB / 1.116 GB, free: 6.625 MB / 0.8731 GB
Notification: Performance of simCode: alias equations: time 0.001047/0.4174, allocations: 159.1 kB / 1.116 GB, free: 6.473 MB / 0.8731 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004554/0.4179, allocations: 219.3 kB / 1.116 GB, free: 6.258 MB / 0.8731 GB
Notification: Performance of SimCode: time 7.41e-07/0.4179, allocations: 0 / 1.116 GB, free: 6.258 MB / 0.8731 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 3.942/4.36, allocations: 17.84 MB / 1.133 GB, free: 4.691 MB / 0.8887 GB
Notification: Performance of buildModelFMU: Generate platform static: time 8.935/13.29, allocations: 14.58 kB / 1.133 GB, free: 4.68 MB / 0.8887 GB
(rm -f Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe ; mkfifo Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe >> ../files/Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater_res.mat --tempDir=temp_Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_CoupledVolumesWater_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 Buildings_latest_Buildings_Fluid_MixingVolumes_Validation_CoupledVolumesWater.fmu > Buildings_latest_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesWater.pipe 2>&1)