Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1.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/PowerSystems 2.0.0/package.mo", uses=false) Using package PowerSystems with version 2.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/PowerSystems 2.0.0/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(PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1,fileNamePrefix="PowerSystems_PowerSystems_Examples_PowerWorld_Test_HydroPlantTest1",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1,fileNamePrefix="PowerSystems_PowerSystems_Examples_PowerWorld_Test_HydroPlantTest1",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 0.001139/0.001139, allocations: 110.2 kB / 17.07 MB, free: 6.016 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001102/0.001102, allocations: 191 kB / 18 MB, free: 5.098 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.354/1.354, allocations: 222.9 MB / 241.7 MB, free: 15.15 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/PowerSystems 2.0.0/package.mo): time 0.176/0.176, allocations: 38.04 MB / 329.9 MB, free: 8.68 MB / 270.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001416/0.001416, allocations: 63.91 kB / 457.6 MB, free: 7.332 MB / 334.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3932/0.3947, allocations: 58.06 MB / 0.5036 GB, free: 7.434 MB / 382.1 MB Notification: Performance of NFInst.instantiate(PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1): time 0.007967/0.4027, allocations: 5.134 MB / 0.5086 GB, free: 3.824 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.003687/0.4064, allocations: 2.131 MB / 0.5107 GB, free: 2.312 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008124/0.4072, allocations: 23.38 kB / 0.5107 GB, free: 2.305 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001216/0.4085, allocations: 261.2 kB / 0.511 GB, free: 2.141 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.001334/0.4098, allocations: 348 kB / 0.5113 GB, free: 1.934 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.001171/0.411, allocations: 398.4 kB / 0.5117 GB, free: 1.711 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.001322/0.4124, allocations: 0.9176 MB / 0.5126 GB, free: 1.258 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0008172/0.4132, allocations: 0.5072 MB / 0.5131 GB, free: 1.004 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0007027/0.4139, allocations: 354.6 kB / 0.5134 GB, free: 0.832 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0007886/0.4147, allocations: 352.1 kB / 0.5138 GB, free: 0.6562 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002935/0.415, allocations: 68.97 kB / 0.5138 GB, free: 0.6562 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0008831/0.4159, allocations: 350.5 kB / 0.5142 GB, free: 0.5352 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0003317/0.4163, allocations: 190.8 kB / 0.5143 GB, free: 436 kB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0006539/0.4169, allocations: 331.3 kB / 0.5147 GB, free: 208 kB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.001924/0.4189, allocations: 0.9356 MB / 0.5156 GB, free: 15.81 MB / 398.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.278e-06/0.4189, allocations: 1.188 kB / 0.5156 GB, free: 15.81 MB / 398.1 MB Notification: Performance of FrontEnd: time 1.222e-06/0.4189, allocations: 0 / 0.5156 GB, free: 15.81 MB / 398.1 MB Notification: Performance of Transformations before backend: time 3.637e-05/0.4189, allocations: 0 / 0.5156 GB, free: 15.81 MB / 398.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 127 * Number of variables: 127 Notification: Performance of Generate backend data structure: time 0.00306/0.422, allocations: 1.049 MB / 0.5166 GB, free: 15.05 MB / 398.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.525e-05/0.4221, allocations: 13.7 kB / 0.5166 GB, free: 15.05 MB / 398.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.000209/0.4223, allocations: 92.55 kB / 0.5167 GB, free: 14.98 MB / 398.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001057/0.4233, allocations: 149.7 kB / 0.5168 GB, free: 14.93 MB / 398.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001202/0.4245, allocations: 0.5324 MB / 0.5174 GB, free: 14.55 MB / 398.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.799e-05/0.4246, allocations: 42.06 kB / 0.5174 GB, free: 14.53 MB / 398.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001511/0.4248, allocations: 50.86 kB / 0.5174 GB, free: 14.52 MB / 398.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001626/0.4264, allocations: 0.6786 MB / 0.5181 GB, free: 14.19 MB / 398.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.994e-05/0.4265, allocations: 5 kB / 0.5181 GB, free: 14.18 MB / 398.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.288e-05/0.4265, allocations: 17.73 kB / 0.5181 GB, free: 14.17 MB / 398.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.825e-05/0.4266, allocations: 29.59 kB / 0.5182 GB, free: 14.17 MB / 398.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001526/0.4281, allocations: 0.6032 MB / 0.5187 GB, free: 13.97 MB / 398.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.005969/0.4341, allocations: 2.683 MB / 0.5214 GB, free: 12.07 MB / 398.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001613/0.4358, allocations: 0.6172 MB / 0.522 GB, free: 11.75 MB / 398.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005588/0.4363, allocations: 212.5 kB / 0.5222 GB, free: 11.67 MB / 398.1 MB Notification: Performance of preOpt evalFunc (simulation): time 4.047e-05/0.4364, allocations: 4.734 kB / 0.5222 GB, free: 11.67 MB / 398.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0007329/0.4371, allocations: 305 kB / 0.5225 GB, free: 11.52 MB / 398.1 MB Notification: Performance of pre-optimization done (n=41): time 3.216e-06/0.4371, allocations: 4 kB / 0.5225 GB, free: 11.51 MB / 398.1 MB Notification: Performance of matching and sorting (n=41): time 0.002354/0.4395, allocations: 0.7614 MB / 0.5232 GB, free: 11.15 MB / 398.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001131/0.4396, allocations: 134.2 kB / 0.5233 GB, free: 11 MB / 398.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009135/0.4406, allocations: 497.8 kB / 0.5238 GB, free: 10.77 MB / 398.1 MB Notification: Performance of collectPreVariables (initialization): time 5.431e-05/0.4406, allocations: 36.45 kB / 0.5238 GB, free: 10.73 MB / 398.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.000251/0.4409, allocations: 308.3 kB / 0.5241 GB, free: 10.48 MB / 398.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001315/0.441, allocations: 151.3 kB / 0.5243 GB, free: 10.36 MB / 398.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001567/0.4412, allocations: 91.08 kB / 0.5244 GB, free: 10.31 MB / 398.1 MB Notification: Performance of setup shared object (initialization): time 0.0001608/0.4414, allocations: 366 kB / 0.5247 GB, free: 9.977 MB / 398.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005163/0.4419, allocations: 195.3 kB / 0.5249 GB, free: 9.91 MB / 398.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000615/0.4425, allocations: 311.8 kB / 0.5252 GB, free: 9.703 MB / 398.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.00114/0.4437, allocations: 0.5203 MB / 0.5257 GB, free: 9.387 MB / 398.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.728e-06/0.4437, allocations: 0 / 0.5257 GB, free: 9.387 MB / 398.1 MB Notification: Performance of matching and sorting (n=59) (initialization): time 0.00195/0.4456, allocations: 0.776 MB / 0.5265 GB, free: 9.062 MB / 398.1 MB Notification: Performance of prepare postOptimizeDAE: time 4.359e-05/0.4457, allocations: 34.09 kB / 0.5265 GB, free: 9.031 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.474e-05/0.4457, allocations: 3.281 kB / 0.5265 GB, free: 9.031 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005307/0.4462, allocations: 145.3 kB / 0.5266 GB, free: 8.984 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003942/0.4466, allocations: 92.42 kB / 0.5267 GB, free: 8.973 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003553/0.4502, allocations: 2.644 MB / 0.5293 GB, free: 6.898 MB / 398.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005594/0.4508, allocations: 74.64 kB / 0.5294 GB, free: 6.867 MB / 398.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.355e-05/0.4509, allocations: 20.59 kB / 0.5294 GB, free: 6.863 MB / 398.1 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0006644/0.4515, allocations: 337.5 kB / 0.5297 GB, free: 6.684 MB / 398.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005431/0.4521, allocations: 297.3 kB / 0.53 GB, free: 6.484 MB / 398.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009878/0.4531, allocations: 0.5083 MB / 0.5305 GB, free: 6.16 MB / 398.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 5.6e-06/0.4531, allocations: 1.625 kB / 0.5305 GB, free: 6.16 MB / 398.1 MB Notification: Performance of matching and sorting (n=59) (initialization_lambda0): time 0.001479/0.4546, allocations: 0.6899 MB / 0.5312 GB, free: 5.852 MB / 398.1 MB Notification: Performance of prepare postOptimizeDAE: time 3.927e-05/0.4546, allocations: 34.39 kB / 0.5312 GB, free: 5.82 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.391e-06/0.4546, allocations: 7.5 kB / 0.5312 GB, free: 5.816 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0003463/0.455, allocations: 128.6 kB / 0.5313 GB, free: 5.77 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000369/0.4554, allocations: 87.09 kB / 0.5314 GB, free: 5.762 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002653/0.458, allocations: 2.457 MB / 0.5338 GB, free: 3.727 MB / 398.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005485/0.4586, allocations: 64.89 kB / 0.5339 GB, free: 3.699 MB / 398.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.532e-05/0.4587, allocations: 20.11 kB / 0.5339 GB, free: 3.695 MB / 398.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * Number of states: 0 () * Number of discrete variables: 7 (system.initime,trapezoid.count,$PRE.trapezoid.count,trapezoid.T_start,$PRE.trapezoid.T_start,$whenCondition1,hydroPlant.reservoirLevel.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (45): * Single equations (assignments): 43 * Array equations: 0 * Algorithm blocks: 1 * 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 {(1,13)} Notification: Performance of prepare postOptimizeDAE: time 0.0002129/0.4589, allocations: 206.1 kB / 0.5341 GB, free: 3.496 MB / 398.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001329/0.459, allocations: 57.88 kB / 0.5342 GB, free: 3.465 MB / 398.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001302/0.4603, allocations: 0.5191 MB / 0.5347 GB, free: 3.23 MB / 398.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.536e-06/0.4604, allocations: 4.406 kB / 0.5347 GB, free: 3.23 MB / 398.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.37e-06/0.4604, allocations: 6.031 kB / 0.5347 GB, free: 3.227 MB / 398.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.382e-06/0.4604, allocations: 1.219 kB / 0.5347 GB, free: 3.227 MB / 398.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002095/0.4625, allocations: 1.171 MB / 0.5358 GB, free: 2.375 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.871e-06/0.4625, allocations: 1.25 kB / 0.5358 GB, free: 2.375 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004754/0.463, allocations: 87.5 kB / 0.5359 GB, free: 2.352 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0001216/0.4631, allocations: 38.83 kB / 0.5359 GB, free: 2.324 MB / 398.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.429e-05/0.4632, allocations: 7.5 kB / 0.536 GB, free: 2.32 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001077/0.4643, allocations: 1.456 MB / 0.5374 GB, free: 0.8281 MB / 398.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.34e-06/0.4643, allocations: 9.016 kB / 0.5374 GB, free: 0.8203 MB / 398.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001743/0.466, allocations: 0.8445 MB / 0.5382 GB, free: 316 kB / 398.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0002883/0.4663, allocations: 171.2 kB / 0.5384 GB, free: 148 kB / 398.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001129/0.4665, allocations: 16.36 kB / 0.5384 GB, free: 136 kB / 398.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004409/0.4669, allocations: 39.86 kB / 0.5384 GB, free: 116 kB / 398.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001003/0.467, allocations: 32.2 kB / 0.5385 GB, free: 100 kB / 398.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.189e-05/0.467, allocations: 16.59 kB / 0.5385 GB, free: 92 kB / 398.1 MB Notification: Performance of sorting global known variables: time 0.0006074/0.4677, allocations: 360.6 kB / 0.5388 GB, free: 15.88 MB / 414.1 MB Notification: Performance of sort global known variables: time 1.6e-07/0.4677, allocations: 1.688 kB / 0.5388 GB, free: 15.88 MB / 414.1 MB Notification: Performance of remove unused functions: time 0.001073/0.4688, allocations: 247.2 kB / 0.5391 GB, free: 15.82 MB / 414.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 4 (hydroPlant.reservoirLevel.y,hydroPlant.rotor.phi,hydroPlant.rotor.w,hydroPlant.controlDynamics.x_scaled[1]) * Number of discrete variables: 4 (system.initime,$whenCondition1,trapezoid.T_start,trapezoid.count) * Number of discrete states: 1 (trapezoid.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (40): * Single equations (assignments): 36 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 3 * 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): 1 system {(1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.002133/0.4709, allocations: 1.404 MB / 0.5404 GB, free: 14.76 MB / 414.1 MB Notification: Performance of simCode: created initialization part: time 0.002318/0.4732, allocations: 1.139 MB / 0.5415 GB, free: 14 MB / 414.1 MB Notification: Performance of simCode: created event and clocks part: time 3.647e-06/0.4732, allocations: 1.031 kB / 0.5415 GB, free: 14 MB / 414.1 MB Notification: Performance of simCode: created simulation system equations: time 0.0006811/0.4739, allocations: 354.2 kB / 0.5419 GB, free: 13.77 MB / 414.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0008031/0.4747, allocations: 112.8 kB / 0.542 GB, free: 13.71 MB / 414.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01139/0.4861, allocations: 5.445 MB / 0.5473 GB, free: 10.09 MB / 414.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006367/0.4868, allocations: 0.9045 MB / 0.5482 GB, free: 9.285 MB / 414.1 MB Notification: Performance of simCode: alias equations: time 0.0004255/0.4873, allocations: 98.67 kB / 0.5483 GB, free: 9.242 MB / 414.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003561/0.4876, allocations: 198 kB / 0.5485 GB, free: 9.074 MB / 414.1 MB Notification: Performance of SimCode: time 1.804e-06/0.4877, allocations: 1.5 kB / 0.5485 GB, free: 9.074 MB / 414.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04074/0.5284, allocations: 13.9 MB / 0.562 GB, free: 11.47 MB / 430.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 12.54/13.07, allocations: 16 kB / 0.5621 GB, free: 11.46 MB / 430.1 MB (rm -f PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1.pipe ; mkfifo PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1.pipe ; head -c 1048576 < PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1.pipe >> ../files/PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1.sim & python3 -m fmpy simulate --output-file PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1_res.csv --start-time 0 --stop-time 900 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.36 PowerSystems_PowerSystems_Examples_PowerWorld_Test_HydroPlantTest1.fmu > PowerSystems_PowerSystems.Examples.PowerWorld.Test.HydroPlantTest1.pipe 2>&1)