Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.8.0.x_Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc.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.HeatExchangers.CoolingTowers.Examples.YorkCalc,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Fluid_HeatExchangers_CoolingTowers_Examples_YorkCalc",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Fluid_HeatExchangers_CoolingTowers_Examples_YorkCalc",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 1.634/1.634, allocations: 288.2 MB / 303.2 MB, free: 8.121 MB / 234.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.00104/0.00104, allocations: 179.7 kB / 371.8 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 1.495/1.495, allocations: 205.4 MB / 0.6305 GB, free: 10.03 MB / 458.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.000806/0.000806, allocations: 82.98 kB / 0.7439 GB, free: 5.949 MB / 0.5573 GB Notification: Performance of FrontEnd - loaded program: time 0.0003581/0.0003581, allocations: 11.72 kB / 0.8669 GB, free: 142.1 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1997/0.2001, allocations: 115.3 MB / 0.9795 GB, free: 27.62 MB / 0.6198 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc): time 0.06598/0.2661, allocations: 73.44 MB / 1.051 GB, free: 1.992 MB / 0.6667 GB Notification: Performance of NFInst.instExpressions: time 0.6928/0.959, allocations: 143.5 MB / 1.191 GB, free: 7.363 MB / 0.7136 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003662/0.9627, allocations: 82.53 kB / 1.191 GB, free: 7.328 MB / 0.7136 GB Notification: Performance of NFTyping.typeComponents: time 0.003668/0.9664, allocations: 1.076 MB / 1.193 GB, free: 6.426 MB / 0.7136 GB Notification: Performance of NFTyping.typeBindings: time 0.009976/0.9764, allocations: 3.078 MB / 1.196 GB, free: 3.926 MB / 0.7136 GB Notification: Performance of NFTyping.typeClassSections: time 0.01058/0.987, allocations: 3.577 MB / 1.199 GB, free: 0.5781 MB / 0.7136 GB Notification: Performance of NFFlatten.flatten: time 0.007586/0.9946, allocations: 3.962 MB / 1.203 GB, free: 12.61 MB / 0.7292 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003459/0.998, allocations: 2.18 MB / 1.205 GB, free: 10.38 MB / 0.7292 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003198/1.001, allocations: 1.693 MB / 1.207 GB, free: 8.684 MB / 0.7292 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001849/1.003, allocations: 1.314 MB / 1.208 GB, free: 7.363 MB / 0.7292 GB Notification: Performance of NFPackage.collectConstants: time 0.0002601/1.003, allocations: 96 kB / 1.208 GB, free: 7.27 MB / 0.7292 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00398/1.007, allocations: 1.654 MB / 1.21 GB, free: 5.613 MB / 0.7292 GB Notification: Performance of NFScalarize.scalarize: time 0.0006378/1.008, allocations: 0.5876 MB / 1.21 GB, free: 5.023 MB / 0.7292 GB Notification: Performance of NFVerifyModel.verify: time 0.0008366/1.009, allocations: 0.5938 MB / 1.211 GB, free: 4.422 MB / 0.7292 GB Notification: Performance of NFConvertDAE.convert: time 0.00498/1.014, allocations: 3.873 MB / 1.215 GB, free: 0.5508 MB / 0.7292 GB Notification: Performance of FrontEnd - DAE generated: time 3.547e-06/1.014, allocations: 0 / 1.215 GB, free: 0.5508 MB / 0.7292 GB Notification: Performance of FrontEnd: time 2.053e-06/1.014, allocations: 0 / 1.215 GB, free: 0.5508 MB / 0.7292 GB Notification: Performance of Transformations before backend: time 8.321e-05/1.014, allocations: 0 / 1.215 GB, free: 0.5508 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: 535 * Number of variables: 535 Notification: Performance of Generate backend data structure: time 0.006215/1.02, allocations: 3.199 MB / 1.218 GB, free: 13.27 MB / 0.7448 GB Notification: Performance of prepare preOptimizeDAE: time 4.263e-05/1.02, allocations: 8.031 kB / 1.218 GB, free: 13.27 MB / 0.7448 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003842/1.021, allocations: 299.6 kB / 1.218 GB, free: 12.96 MB / 0.7448 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002407/1.023, allocations: 0.5833 MB / 1.219 GB, free: 12.38 MB / 0.7448 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003892/1.027, allocations: 2.217 MB / 1.221 GB, free: 10.09 MB / 0.7448 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001376/1.027, allocations: 176.1 kB / 1.221 GB, free: 9.91 MB / 0.7448 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000296/1.027, allocations: 224 kB / 1.221 GB, free: 9.691 MB / 0.7448 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00426/1.032, allocations: 2.407 MB / 1.223 GB, free: 7.105 MB / 0.7448 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.375e-05/1.032, allocations: 4 kB / 1.223 GB, free: 7.102 MB / 0.7448 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000198/1.032, allocations: 94.06 kB / 1.224 GB, free: 7.012 MB / 0.7448 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.599e-05/1.032, allocations: 55.94 kB / 1.224 GB, free: 6.957 MB / 0.7448 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.004255/1.036, allocations: 2.279 MB / 1.226 GB, free: 4.676 MB / 0.7448 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 0.01429/1.051, allocations: 10.03 MB / 1.236 GB, free: 10.27 MB / 0.7605 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002861/1.053, allocations: 1.561 MB / 1.237 GB, free: 8.711 MB / 0.7605 GB Notification: Performance of preOpt evalFunc (simulation): time 0.006593/1.06, allocations: 4.823 MB / 1.242 GB, free: 3.441 MB / 0.7605 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001671/1.062, allocations: 0.8841 MB / 1.243 GB, free: 2.539 MB / 0.7605 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0007186/1.063, allocations: 158.3 kB / 1.243 GB, free: 2.383 MB / 0.7605 GB Notification: Performance of pre-optimization done (n=146): time 3.267e-06/1.063, allocations: 0 / 1.243 GB, free: 2.383 MB / 0.7605 GB Notification: Performance of matching and sorting (n=146): time 0.005432/1.068, allocations: 2.267 MB / 1.245 GB, free: 92 kB / 0.7605 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001713/1.068, allocations: 278.3 kB / 1.245 GB, free: 15.75 MB / 0.7761 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003236/1.071, allocations: 2.21 MB / 1.248 GB, free: 13.53 MB / 0.7761 GB Notification: Performance of collectPreVariables (initialization): time 0.000257/1.072, allocations: 61.7 kB / 1.248 GB, free: 13.46 MB / 0.7761 GB Notification: Performance of collectInitialEqns (initialization): time 0.001075/1.073, allocations: 1.258 MB / 1.249 GB, free: 12.19 MB / 0.7761 GB Notification: Performance of collectInitialBindings (initialization): time 0.0004734/1.073, allocations: 0.4929 MB / 1.249 GB, free: 11.69 MB / 0.7761 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.933e-05/1.073, allocations: 36 kB / 1.249 GB, free: 11.66 MB / 0.7761 GB Notification: Performance of setup shared object (initialization): time 0.0001593/1.074, allocations: 381.8 kB / 1.25 GB, free: 11.28 MB / 0.7761 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00137/1.075, allocations: 0.6481 MB / 1.25 GB, free: 10.63 MB / 0.7761 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001808/1.077, allocations: 1.276 MB / 1.252 GB, free: 9.129 MB / 0.7761 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001579/1.078, allocations: 0.8179 MB / 1.252 GB, free: 8.316 MB / 0.7761 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.658e-06/1.078, allocations: 4 kB / 1.252 GB, free: 8.312 MB / 0.7761 GB Notification: Performance of matching and sorting (n=234) (initialization): time 0.004594/1.083, allocations: 2.21 MB / 1.255 GB, free: 6.09 MB / 0.7761 GB Notification: Performance of prepare postOptimizeDAE: time 0.00172/1.085, allocations: 5.429 MB / 1.26 GB, free: 180 kB / 0.7761 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.941e-05/1.085, allocations: 16 kB / 1.26 GB, free: 164 kB / 0.7761 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006096/1.085, allocations: 108.7 kB / 1.26 GB, free: 52 kB / 0.7761 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001795/1.087, allocations: 447.3 kB / 1.26 GB, free: 15.61 MB / 0.7917 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002282/1.089, allocations: 2.153 MB / 1.262 GB, free: 13.3 MB / 0.7917 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002219/1.092, allocations: 184.4 kB / 1.263 GB, free: 13.12 MB / 0.7917 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001687/1.092, allocations: 91.97 kB / 1.263 GB, free: 13.03 MB / 0.7917 GB Notification: Performance of prepare postOptimizeDAE: time 8.856e-06/1.092, allocations: 4 kB / 1.263 GB, free: 13.02 MB / 0.7917 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.003755/1.096, allocations: 1.899 MB / 1.265 GB, free: 11.12 MB / 0.7917 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.296e-05/1.096, allocations: 16 kB / 1.265 GB, free: 11.11 MB / 0.7917 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005376/1.096, allocations: 105.1 kB / 1.265 GB, free: 11 MB / 0.7917 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001626/1.098, allocations: 427.3 kB / 1.265 GB, free: 10.58 MB / 0.7917 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002121/1.1, allocations: 2.146 MB / 1.267 GB, free: 8.277 MB / 0.7917 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002046/1.102, allocations: 168.4 kB / 1.267 GB, free: 8.117 MB / 0.7917 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001553/1.102, allocations: 87.97 kB / 1.267 GB, free: 8.031 MB / 0.7917 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 58 * Number of states: 0 () * Number of discrete variables: 9 ($whenCondition2,$whenCondition1,$PRE.weaDat.conTimMin.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTim.tNext,$PRE.onOffCon.y,onOffCon.y,conFan.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (225): * Single equations (assignments): 219 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {1 2} Notification: Performance of prepare postOptimizeDAE: time 0.001271/1.103, allocations: 0.6683 MB / 1.268 GB, free: 7.352 MB / 0.7917 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000388/1.104, allocations: 260.7 kB / 1.268 GB, free: 7.094 MB / 0.7917 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004751/1.109, allocations: 2.172 MB / 1.27 GB, free: 4.902 MB / 0.7917 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.253e-05/1.109, allocations: 20 kB / 1.271 GB, free: 4.883 MB / 0.7917 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.468e-06/1.109, allocations: 4 kB / 1.271 GB, free: 4.879 MB / 0.7917 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003364/1.112, allocations: 1.768 MB / 1.272 GB, free: 3.043 MB / 0.7917 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.007714/1.12, allocations: 4.319 MB / 1.276 GB, free: 14.64 MB / 0.8073 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.935e-06/1.12, allocations: 0 / 1.276 GB, free: 14.64 MB / 0.8073 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001399/1.121, allocations: 319.6 kB / 1.277 GB, free: 14.33 MB / 0.8073 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005089/1.122, allocations: 92.77 kB / 1.277 GB, free: 14.23 MB / 0.8073 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.000122/1.122, allocations: 47.91 kB / 1.277 GB, free: 14.19 MB / 0.8073 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001726/1.124, allocations: 1.575 MB / 1.278 GB, free: 12.48 MB / 0.8073 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.573e-06/1.124, allocations: 0 / 1.278 GB, free: 12.48 MB / 0.8073 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005757/1.129, allocations: 2.944 MB / 1.281 GB, free: 9.477 MB / 0.8073 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00145/1.131, allocations: 0.5677 MB / 1.282 GB, free: 8.887 MB / 0.8073 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003227/1.131, allocations: 35.98 kB / 1.282 GB, free: 8.852 MB / 0.8073 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001592/1.133, allocations: 163.8 kB / 1.282 GB, free: 8.691 MB / 0.8073 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002162/1.133, allocations: 122 kB / 1.282 GB, free: 8.574 MB / 0.8073 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001401/1.133, allocations: 75.95 kB / 1.282 GB, free: 8.5 MB / 0.8073 GB Notification: Performance of sorting global known variables: time 0.002199/1.135, allocations: 1.478 MB / 1.284 GB, free: 7.016 MB / 0.8073 GB Notification: Performance of sort global known variables: time 2e-07/1.135, allocations: 0 / 1.284 GB, free: 7.016 MB / 0.8073 GB Notification: Performance of remove unused functions: time 0.003834/1.139, allocations: 1.493 MB / 1.285 GB, free: 5.52 MB / 0.8073 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 6 (tow.vol.dynBal.U,pum.vol.dynBal.U,pum.filter.x[1],pum.filter.x[2],vol.dynBal.U,conFan.I.y) * Number of discrete variables: 5 ($whenCondition2,$whenCondition1,weaDat.conTimMin.tNext,weaDat.conTim.tNext,onOffCon.y) * Number of discrete states: 3 (onOffCon.y,weaDat.conTimMin.tNext,weaDat.conTim.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (171): * Single equations (assignments): 162 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {1 3} Notification: Performance of Backend phase and start with SimCode phase: time 0.00789/1.147, allocations: 4.746 MB / 1.29 GB, free: 0.8398 MB / 0.8073 GB Notification: Performance of simCode: created initialization part: time 0.005963/1.153, allocations: 3.01 MB / 1.293 GB, free: 13.8 MB / 0.823 GB Notification: Performance of simCode: created event and clocks part: time 8.916e-06/1.153, allocations: 4 kB / 1.293 GB, free: 13.79 MB / 0.823 GB Notification: Performance of simCode: created simulation system equations: time 0.001827/1.155, allocations: 0.9827 MB / 1.294 GB, free: 12.8 MB / 0.823 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005026/1.16, allocations: 1.122 MB / 1.295 GB, free: 11.69 MB / 0.823 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01574/1.176, allocations: 16.96 MB / 1.311 GB, free: 10.1 MB / 0.8386 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001383/1.177, allocations: 1.838 MB / 1.313 GB, free: 8.23 MB / 0.8386 GB Notification: Performance of simCode: alias equations: time 0.00342/1.181, allocations: 0.7822 MB / 1.314 GB, free: 7.441 MB / 0.8386 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001559/1.182, allocations: 1.19 MB / 1.315 GB, free: 6.25 MB / 0.8386 GB Notification: Performance of SimCode: time 3.817e-06/1.182, allocations: 4 kB / 1.315 GB, free: 6.246 MB / 0.8386 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.1148/1.297, allocations: 74.22 MB / 1.388 GB, free: 12.6 MB / 0.9167 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001986/1.297, allocations: 279.2 kB / 1.388 GB, free: 12.24 MB / 0.9167 GB Notification: Performance of buildModelFMU: Generate platform static: time 4.845/6.142, allocations: 3.938 kB / 1.388 GB, free: 12.24 MB / 0.9167 GB (rm -f Buildings_maint.8.0.x_Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc.pipe ; mkfifo Buildings_maint.8.0.x_Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc.pipe ; head -c 1048576 < Buildings_maint.8.0.x_Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc.pipe >> ../files/Buildings_maint.8.0.x_Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_maint_8_0_x_Buildings_Fluid_HeatExchangers_CoolingTowers_Examples_YorkCalc_fmu --startTime=1.5552e+07 --stopTime=1.57248e+07 --timeout=50 --tolerance=1e-06 Buildings_maint_8_0_x_Buildings_Fluid_HeatExchangers_CoolingTowers_Examples_YorkCalc.fmu > Buildings_maint.8.0.x_Buildings.Fluid.HeatExchangers.CoolingTowers.Examples.YorkCalc.pipe 2>&1)