Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.8.0.x_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+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/ModelicaServices 3.2.3+maint.om/package.mo", uses=false)
Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/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 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo)
Using package Buildings with version 8.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo)
Running command: "" <> buildModelFMU(Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Fluid_MassExchangers_Validation_ConstantEffectivenessZeroFlowBothStreams",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Fluid_MassExchangers_Validation_ConstantEffectivenessZeroFlowBothStreams",fmuType="me",version="2.0",platforms={"static"})
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo): time 1.713/1.713, allocations: 288.4 MB / 303.3 MB, free: 8.176 MB / 234.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001117/0.001117, allocations: 188.5 kB / 372 MB, free: 10.29 MB / 298.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.86/1.86, allocations: 205.4 MB / 0.6307 GB, free: 10 MB / 458.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.000847/0.0008466, allocations: 90.34 kB / 0.7441 GB, free: 5.926 MB / 0.5573 GB
Notification: Performance of FrontEnd - loaded program: time 0.0004355/0.0004359, allocations: 11.78 kB / 0.867 GB, free: 142.1 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2686/0.2691, allocations: 115.3 MB / 0.9796 GB, free: 27.61 MB / 0.6198 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams): time 0.8962/1.165, allocations: 195.2 MB / 1.17 GB, free: 10.86 MB / 0.7136 GB
Notification: Performance of NFInst.instExpressions: time 0.01518/1.181, allocations: 6.539 MB / 1.177 GB, free: 5.523 MB / 0.7136 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.002996/1.184, allocations: 36.5 kB / 1.177 GB, free: 5.508 MB / 0.7136 GB
Notification: Performance of NFTyping.typeComponents: time 0.002771/1.187, allocations: 0.5042 MB / 1.177 GB, free: 5.082 MB / 0.7136 GB
Notification: Performance of NFTyping.typeBindings: time 0.009762/1.196, allocations: 1.763 MB / 1.179 GB, free: 3.711 MB / 0.7136 GB
Notification: Performance of NFTyping.typeClassSections: time 0.00412/1.2, allocations: 0.9102 MB / 1.18 GB, free: 3.094 MB / 0.7136 GB
Notification: Performance of NFFlatten.flatten: time 0.006466/1.207, allocations: 3.174 MB / 1.183 GB, free: 1.207 MB / 0.7136 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.002369/1.209, allocations: 0.7895 MB / 1.184 GB, free: 0.7266 MB / 0.7136 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.006295/1.216, allocations: 1.519 MB / 1.185 GB, free: 15.83 MB / 0.7292 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.002902/1.219, allocations: 0.8647 MB / 1.186 GB, free: 15.35 MB / 0.7292 GB
Notification: Performance of NFPackage.collectConstants: time 0.0005129/1.219, allocations: 46.69 kB / 1.186 GB, free: 15.35 MB / 0.7292 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.005353/1.224, allocations: 1.546 MB / 1.188 GB, free: 14.54 MB / 0.7292 GB
Notification: Performance of NFScalarize.scalarize: time 0.0008711/1.225, allocations: 341 kB / 1.188 GB, free: 14.31 MB / 0.7292 GB
Notification: Performance of NFVerifyModel.verify: time 0.001035/1.226, allocations: 277.3 kB / 1.188 GB, free: 14.15 MB / 0.7292 GB
Notification: Performance of NFConvertDAE.convert: time 0.003861/1.23, allocations: 1.707 MB / 1.19 GB, free: 13.07 MB / 0.7292 GB
Notification: Performance of FrontEnd - DAE generated: time 7.724e-06/1.23, allocations: 0 / 1.19 GB, free: 13.07 MB / 0.7292 GB
Notification: Performance of FrontEnd: time 2.866e-06/1.23, allocations: 0 / 1.19 GB, free: 13.07 MB / 0.7292 GB
Notification: Performance of Transformations before backend: time 7.952e-05/1.23, allocations: 0 / 1.19 GB, free: 13.07 MB / 0.7292 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 209
 * Number of variables: 209
Notification: Performance of Generate backend data structure: time 0.005768/1.236, allocations: 1.613 MB / 1.191 GB, free: 11.85 MB / 0.7292 GB
Notification: Performance of prepare preOptimizeDAE: time 5.286e-05/1.236, allocations: 15.16 kB / 1.191 GB, free: 11.85 MB / 0.7292 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0004721/1.237, allocations: 132.5 kB / 1.192 GB, free: 11.74 MB / 0.7292 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003518/1.24, allocations: 0.5889 MB / 1.192 GB, free: 11.48 MB / 0.7292 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.002665/1.243, allocations: 0.9272 MB / 1.193 GB, free: 10.75 MB / 0.7292 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0007004/1.244, allocations: 194.5 kB / 1.193 GB, free: 10.68 MB / 0.7292 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003031/1.244, allocations: 81.19 kB / 1.193 GB, free: 10.65 MB / 0.7292 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.003472/1.247, allocations: 1.268 MB / 1.194 GB, free: 9.953 MB / 0.7292 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.743e-05/1.248, allocations: 0 / 1.194 GB, free: 9.953 MB / 0.7292 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001505/1.248, allocations: 35.92 kB / 1.195 GB, free: 9.926 MB / 0.7292 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.927e-05/1.248, allocations: 49.45 kB / 1.195 GB, free: 9.914 MB / 0.7292 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.004063/1.252, allocations: 1.605 MB / 1.196 GB, free: 9.16 MB / 0.7292 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 0.008521/1.26, allocations: 4.103 MB / 1.2 GB, free: 5.828 MB / 0.7292 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.002785/1.263, allocations: 1.049 MB / 1.201 GB, free: 5.336 MB / 0.7292 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.001572/1.265, allocations: 0.7007 MB / 1.202 GB, free: 5.008 MB / 0.7292 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.001205/1.266, allocations: 0.6362 MB / 1.202 GB, free: 4.379 MB / 0.7292 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.502e-05/1.266, allocations: 41.38 kB / 1.203 GB, free: 4.332 MB / 0.7292 GB
Notification: Performance of pre-optimization done (n=76): time 4.349e-06/1.266, allocations: 2.969 kB / 1.203 GB, free: 4.332 MB / 0.7292 GB
Notification: Performance of matching and sorting (n=76): time 0.005329/1.271, allocations: 1.912 MB / 1.204 GB, free: 3.453 MB / 0.7292 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 6.106e-05/1.272, allocations: 63.97 kB / 1.204 GB, free: 3.387 MB / 0.7292 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001549/1.273, allocations: 0.8094 MB / 1.205 GB, free: 2.914 MB / 0.7292 GB
Notification: Performance of collectPreVariables (initialization): time 0.0001657/1.273, allocations: 47.53 kB / 1.205 GB, free: 2.867 MB / 0.7292 GB
Notification: Performance of collectInitialEqns (initialization): time 0.000508/1.274, allocations: 441.7 kB / 1.206 GB, free: 2.484 MB / 0.7292 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0003197/1.274, allocations: 258.8 kB / 1.206 GB, free: 2.258 MB / 0.7292 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 7.208e-05/1.274, allocations: 14.44 kB / 1.206 GB, free: 2.246 MB / 0.7292 GB
Notification: Performance of setup shared object (initialization): time 0.0001838/1.274, allocations: 334.1 kB / 1.206 GB, free: 1.922 MB / 0.7292 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.001544/1.276, allocations: 0.5677 MB / 1.207 GB, free: 1.641 MB / 0.7292 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.001617/1.278, allocations: 0.6911 MB / 1.208 GB, free: 0.9141 MB / 0.7292 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001558/1.279, allocations: 0.6216 MB / 1.208 GB, free: 292 kB / 0.7292 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.069e-06/1.279, allocations: 0 / 1.208 GB, free: 292 kB / 0.7292 GB
Notification: Performance of matching and sorting (n=87) (initialization): time 0.003635/1.283, allocations: 1.427 MB / 1.21 GB, free: 14.84 MB / 0.7448 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0001388/1.283, allocations: 156.8 kB / 1.21 GB, free: 14.67 MB / 0.7448 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.156e-05/1.283, allocations: 0 / 1.21 GB, free: 14.67 MB / 0.7448 GB
Notification: Performance of postOpt tearingSystem (initialization): time 3.092e-05/1.283, allocations: 8 kB / 1.21 GB, free: 14.66 MB / 0.7448 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001592/1.285, allocations: 272.3 kB / 1.21 GB, free: 14.39 MB / 0.7448 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008508/1.285, allocations: 1.195 MB / 1.211 GB, free: 13.15 MB / 0.7448 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001553/1.287, allocations: 197.7 kB / 1.211 GB, free: 12.96 MB / 0.7448 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001223/1.287, allocations: 39.91 kB / 1.211 GB, free: 12.92 MB / 0.7448 GB
Notification: Performance of prepare postOptimizeDAE: time 1.339e-05/1.287, allocations: 5.406 kB / 1.211 GB, free: 12.92 MB / 0.7448 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.003198/1.29, allocations: 1.317 MB / 1.213 GB, free: 11.59 MB / 0.7448 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.628e-06/1.29, allocations: 4 kB / 1.213 GB, free: 11.59 MB / 0.7448 GB
Notification: Performance of postOpt tearingSystem (initialization): time 9.628e-06/1.29, allocations: 4.062 kB / 1.213 GB, free: 11.59 MB / 0.7448 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001204/1.292, allocations: 255.7 kB / 1.213 GB, free: 11.34 MB / 0.7448 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.222e-05/1.292, allocations: 15.92 kB / 1.213 GB, free: 11.32 MB / 0.7448 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001512/1.293, allocations: 195.1 kB / 1.213 GB, free: 11.13 MB / 0.7448 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001175/1.293, allocations: 31.98 kB / 1.213 GB, free: 11.1 MB / 0.7448 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 5
 * Number of states: 0 ()
 * Number of discrete variables: 2 (hex.i1_w,hex.i2_w)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (86):
 * Single equations (assignments): 83
 * Array equations: 0
 * Algorithm blocks: 1
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * Torn equation systems: 0
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Performance of prepare postOptimizeDAE: time 0.0008085/1.294, allocations: 369 kB / 1.213 GB, free: 10.73 MB / 0.7448 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003682/1.295, allocations: 102.8 kB / 1.214 GB, free: 10.62 MB / 0.7448 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003734/1.298, allocations: 1.433 MB / 1.215 GB, free: 9.184 MB / 0.7448 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.102e-05/1.298, allocations: 8.094 kB / 1.215 GB, free: 9.176 MB / 0.7448 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.067e-05/1.298, allocations: 3.953 kB / 1.215 GB, free: 9.172 MB / 0.7448 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.203e-05/1.298, allocations: 7.969 kB / 1.215 GB, free: 9.164 MB / 0.7448 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006537/1.305, allocations: 2.913 MB / 1.218 GB, free: 6.148 MB / 0.7448 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.382e-05/1.305, allocations: 4.469 kB / 1.218 GB, free: 6.145 MB / 0.7448 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001296/1.306, allocations: 247.7 kB / 1.218 GB, free: 5.902 MB / 0.7448 GB
Notification: Performance of postOpt tearingSystem (simulation): time 2.174e-05/1.306, allocations: 12 kB / 1.218 GB, free: 5.891 MB / 0.7448 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.043e-05/1.306, allocations: 19.98 kB / 1.218 GB, free: 5.871 MB / 0.7448 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007/1.307, allocations: 1.191 MB / 1.219 GB, free: 4.633 MB / 0.7448 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.058e-05/1.307, allocations: 12.12 kB / 1.219 GB, free: 4.621 MB / 0.7448 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003667/1.311, allocations: 1.537 MB / 1.221 GB, free: 3.023 MB / 0.7448 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0009707/1.312, allocations: 315.4 kB / 1.221 GB, free: 2.695 MB / 0.7448 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003206/1.312, allocations: 16 kB / 1.221 GB, free: 2.68 MB / 0.7448 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001592/1.314, allocations: 167.8 kB / 1.221 GB, free: 2.516 MB / 0.7448 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001821/1.314, allocations: 64.38 kB / 1.221 GB, free: 2.453 MB / 0.7448 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001115/1.314, allocations: 31.98 kB / 1.221 GB, free: 2.422 MB / 0.7448 GB
Notification: Performance of sorting global known variables: time 0.001125/1.315, allocations: 0.5622 MB / 1.222 GB, free: 1.848 MB / 0.7448 GB
Notification: Performance of sort global known variables: time 3.6e-07/1.315, allocations: 0 / 1.222 GB, free: 1.848 MB / 0.7448 GB
Notification: Performance of remove unused functions: time 0.002649/1.318, allocations: 0.538 MB / 1.222 GB, free: 1.309 MB / 0.7448 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 16
 * 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 (76):
 * Single equations (assignments): 74
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * Torn equation systems: 0
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Performance of Backend phase and start with SimCode phase: time 0.005196/1.323, allocations: 2.247 MB / 1.225 GB, free: 15 MB / 0.7605 GB
Notification: Performance of simCode: created initialization part: time 0.00615/1.329, allocations: 2.135 MB / 1.227 GB, free: 12.84 MB / 0.7605 GB
Notification: Performance of simCode: created event and clocks part: time 1.136e-05/1.329, allocations: 4 kB / 1.227 GB, free: 12.84 MB / 0.7605 GB
Notification: Performance of simCode: created simulation system equations: time 0.001897/1.331, allocations: 0.6989 MB / 1.227 GB, free: 12.14 MB / 0.7605 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003527/1.335, allocations: 0.5099 MB / 1.228 GB, free: 11.63 MB / 0.7605 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01682/1.352, allocations: 6.953 MB / 1.235 GB, free: 4.441 MB / 0.7605 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008051/1.353, allocations: 1.094 MB / 1.236 GB, free: 3.316 MB / 0.7605 GB
Notification: Performance of simCode: alias equations: time 0.002122/1.355, allocations: 395.5 kB / 1.236 GB, free: 2.926 MB / 0.7605 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006868/1.355, allocations: 387.3 kB / 1.236 GB, free: 2.547 MB / 0.7605 GB
Notification: Performance of SimCode: time 1.322e-06/1.355, allocations: 0 / 1.236 GB, free: 2.547 MB / 0.7605 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.05775/1.413, allocations: 28.79 MB / 1.265 GB, free: 6.191 MB / 0.7917 GB
Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002455/1.413, allocations: 297.2 kB / 1.265 GB, free: 5.836 MB / 0.7917 GB
Notification: Performance of buildModelFMU: Generate platform static: time 2.988/4.402, allocations: 0 / 1.265 GB, free: 5.836 MB / 0.7917 GB
(rm -f Buildings_maint.8.0.x_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams.pipe ; mkfifo Buildings_maint.8.0.x_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams.pipe ; head -c 1048576 < Buildings_maint.8.0.x_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams.pipe >> ../files/Buildings_maint.8.0.x_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator  --tempDir=temp_Buildings_maint_8_0_x_Buildings_Fluid_MassExchangers_Validation_ConstantEffectivenessZeroFlowBothStreams_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_maint_8_0_x_Buildings_Fluid_MassExchangers_Validation_ConstantEffectivenessZeroFlowBothStreams.fmu > Buildings_maint.8.0.x_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlowBothStreams.pipe 2>&1)