Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.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 12.0.0-master/package.mo", uses=false) Using package Buildings with version 12.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-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: translateModel(Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed") translateModel(Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00155/0.00155, allocations: 111.3 kB / 15.23 MB, free: 0.6406 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001831/0.001831, allocations: 199.2 kB / 16.14 MB, free: 6.688 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.536/1.536, allocations: 222.9 MB / 239.8 MB, free: 4.625 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-master/package.mo): time 2.932/2.932, allocations: 472.6 MB / 0.7447 GB, free: 4.891 MB / 0.5919 GB Notification: Performance of FrontEnd - loaded program: time 0.002101/0.002101, allocations: 61 kB / 0.9114 GB, free: 33.63 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3377/0.3398, allocations: 159.9 MB / 1.068 GB, free: 10.83 MB / 0.8262 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed): time 0.06768/0.4075, allocations: 69.54 MB / 1.135 GB, free: 5.059 MB / 0.8887 GB Notification: Performance of NFInst.instExpressions: time 0.02092/0.4285, allocations: 14.71 MB / 1.15 GB, free: 6.312 MB / 0.9044 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.00307/0.4316, allocations: 67.56 kB / 1.15 GB, free: 6.246 MB / 0.9044 GB Notification: Performance of NFTyping.typeComponents: time 0.003287/0.4349, allocations: 0.7537 MB / 1.151 GB, free: 5.488 MB / 0.9044 GB Notification: Performance of NFTyping.typeBindings: time 0.009191/0.4442, allocations: 2.361 MB / 1.153 GB, free: 3.121 MB / 0.9044 GB Notification: Performance of NFTyping.typeClassSections: time 0.006638/0.4508, allocations: 1.786 MB / 1.155 GB, free: 1.352 MB / 0.9044 GB Notification: Performance of NFFlatten.flatten: time 0.009123/0.4599, allocations: 5.958 MB / 1.16 GB, free: 11.38 MB / 0.92 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002851/0.4628, allocations: 1.332 MB / 1.162 GB, free: 10.01 MB / 0.92 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004015/0.4669, allocations: 1.489 MB / 1.163 GB, free: 8.516 MB / 0.92 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002764/0.4697, allocations: 1.268 MB / 1.164 GB, free: 7.242 MB / 0.92 GB Notification: Performance of NFPackage.collectConstants: time 0.0006065/0.4703, allocations: 88 kB / 1.165 GB, free: 7.156 MB / 0.92 GB Notification: Performance of NFFlatten.collectFunctions: time 0.004937/0.4752, allocations: 1.761 MB / 1.166 GB, free: 5.395 MB / 0.92 GB Notification: Performance of NFScalarize.scalarize: time 0.0007916/0.476, allocations: 366.4 kB / 1.167 GB, free: 5.035 MB / 0.92 GB Notification: Performance of NFVerifyModel.verify: time 0.002186/0.4782, allocations: 0.9213 MB / 1.168 GB, free: 4.109 MB / 0.92 GB Notification: Performance of NFConvertDAE.convert: time 0.006875/0.4851, allocations: 3.451 MB / 1.171 GB, free: 0.6484 MB / 0.92 GB Notification: Performance of FrontEnd - DAE generated: time 5.68e-06/0.4852, allocations: 0 / 1.171 GB, free: 0.6484 MB / 0.92 GB Notification: Performance of FrontEnd: time 3.267e-06/0.4852, allocations: 0 / 1.171 GB, free: 0.6484 MB / 0.92 GB Notification: Performance of Transformations before backend: time 0.0001125/0.4853, allocations: 3.938 kB / 1.171 GB, free: 0.6445 MB / 0.92 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 296 * Number of variables: 296 Notification: Performance of Generate backend data structure: time 0.006514/0.4918, allocations: 2.352 MB / 1.173 GB, free: 14.22 MB / 0.9356 GB Notification: Performance of prepare preOptimizeDAE: time 5.311e-05/0.4919, allocations: 16.03 kB / 1.173 GB, free: 14.2 MB / 0.9356 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.005821/0.4977, allocations: 0.6465 MB / 1.174 GB, free: 13.55 MB / 0.9356 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003493/0.5012, allocations: 1.567 MB / 1.175 GB, free: 11.93 MB / 0.9356 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002008/0.5015, allocations: 132 kB / 1.175 GB, free: 11.8 MB / 0.9356 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0004208/0.5019, allocations: 124 kB / 1.176 GB, free: 11.68 MB / 0.9356 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.004853/0.5068, allocations: 1.625 MB / 1.177 GB, free: 9.961 MB / 0.9356 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.2e-05/0.5068, allocations: 11.92 kB / 1.177 GB, free: 9.949 MB / 0.9356 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001926/0.507, allocations: 55.98 kB / 1.177 GB, free: 9.895 MB / 0.9356 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.739e-05/0.5071, allocations: 32 kB / 1.177 GB, free: 9.863 MB / 0.9356 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005321/0.5124, allocations: 1.445 MB / 1.179 GB, free: 8.41 MB / 0.9356 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 0.0119/0.5243, allocations: 6.962 MB / 1.185 GB, free: 1.105 MB / 0.9356 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002567/0.5269, allocations: 0.7554 MB / 1.186 GB, free: 352 kB / 0.9356 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001774/0.5287, allocations: 498.1 kB / 1.187 GB, free: 15.86 MB / 0.9512 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001464/0.5302, allocations: 1.267 MB / 1.188 GB, free: 14.31 MB / 0.9512 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002161/0.5324, allocations: 0.644 MB / 1.189 GB, free: 13.62 MB / 0.9512 GB Notification: Performance of pre-optimization done (n=69): time 3.066e-06/0.5324, allocations: 0 / 1.189 GB, free: 13.62 MB / 0.9512 GB Notification: Performance of matching and sorting (n=69): time 0.0108/0.5432, allocations: 2.041 MB / 1.191 GB, free: 11.56 MB / 0.9512 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001624/0.5434, allocations: 329 kB / 1.191 GB, free: 11.16 MB / 0.9512 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002617/0.546, allocations: 1.383 MB / 1.192 GB, free: 9.77 MB / 0.9512 GB Notification: Performance of collectPreVariables (initialization): time 0.000146/0.5462, allocations: 45.7 kB / 1.192 GB, free: 9.719 MB / 0.9512 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006594/0.5468, allocations: 0.6997 MB / 1.193 GB, free: 9.012 MB / 0.9512 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002621/0.5471, allocations: 244.5 kB / 1.193 GB, free: 8.77 MB / 0.9512 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004434/0.5476, allocations: 246.3 kB / 1.193 GB, free: 8.523 MB / 0.9512 GB Notification: Performance of setup shared object (initialization): time 0.0001366/0.5477, allocations: 349.9 kB / 1.194 GB, free: 8.176 MB / 0.9512 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.002147/0.5499, allocations: 0.5044 MB / 1.194 GB, free: 7.668 MB / 0.9512 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002433/0.5523, allocations: 0.8155 MB / 1.195 GB, free: 6.73 MB / 0.9512 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00402/0.5563, allocations: 1.15 MB / 1.196 GB, free: 5.484 MB / 0.9512 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.08e-05/0.5564, allocations: 4 kB / 1.196 GB, free: 5.48 MB / 0.9512 GB Notification: Performance of matching and sorting (n=117) (initialization): time 0.007055/0.5634, allocations: 1.63 MB / 1.198 GB, free: 3.832 MB / 0.9512 GB Notification: Performance of prepare postOptimizeDAE: time 5.535e-05/0.5635, allocations: 41.64 kB / 1.198 GB, free: 3.785 MB / 0.9512 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.878e-05/0.5635, allocations: 8.125 kB / 1.198 GB, free: 3.777 MB / 0.9512 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001469/0.565, allocations: 363.4 kB / 1.198 GB, free: 3.426 MB / 0.9512 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001576/0.5666, allocations: 267.5 kB / 1.198 GB, free: 3.164 MB / 0.9512 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001309/0.5679, allocations: 0.8842 MB / 1.199 GB, free: 2.254 MB / 0.9512 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002665/0.5706, allocations: 274.5 kB / 1.2 GB, free: 1.984 MB / 0.9512 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001497/0.5708, allocations: 51.95 kB / 1.2 GB, free: 1.934 MB / 0.9512 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002719/0.5735, allocations: 0.8024 MB / 1.2 GB, free: 1.125 MB / 0.9512 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002419/0.5759, allocations: 0.8058 MB / 1.201 GB, free: 204 kB / 0.9512 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003979/0.5799, allocations: 1.154 MB / 1.202 GB, free: 14.95 MB / 0.9669 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 6.432e-06/0.5799, allocations: 0 / 1.202 GB, free: 14.95 MB / 0.9669 GB Notification: Performance of matching and sorting (n=117) (initialization_lambda0): time 0.006988/0.5869, allocations: 1.626 MB / 1.204 GB, free: 13.3 MB / 0.9669 GB Notification: Performance of prepare postOptimizeDAE: time 5.23e-05/0.587, allocations: 37.64 kB / 1.204 GB, free: 13.26 MB / 0.9669 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.534e-05/0.587, allocations: 4 kB / 1.204 GB, free: 13.26 MB / 0.9669 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001363/0.5884, allocations: 364.6 kB / 1.204 GB, free: 12.9 MB / 0.9669 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001576/0.59, allocations: 263.5 kB / 1.205 GB, free: 12.64 MB / 0.9669 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001336/0.5913, allocations: 0.8976 MB / 1.205 GB, free: 11.72 MB / 0.9669 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002763/0.5941, allocations: 231.2 kB / 1.206 GB, free: 11.5 MB / 0.9669 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001509/0.5943, allocations: 51.95 kB / 1.206 GB, free: 11.45 MB / 0.9669 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 28 * Number of states: 0 () * Number of discrete variables: 7 (N.count,$PRE.N.count,N.T_start,$PRE.N.T_start,heaPum.com.isOn,$PRE.heaPum.com.isOn,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (98): * Single equations (assignments): 96 * 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 {(2,17)} Notification: Performance of prepare postOptimizeDAE: time 0.0004677/0.5947, allocations: 248 kB / 1.206 GB, free: 11.2 MB / 0.9669 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006579/0.5954, allocations: 154.2 kB / 1.206 GB, free: 11.04 MB / 0.9669 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004506/0.5999, allocations: 1.232 MB / 1.207 GB, free: 9.797 MB / 0.9669 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.064e-05/0.6, allocations: 15.92 kB / 1.207 GB, free: 9.781 MB / 0.9669 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.52e-05/0.6, allocations: 7.938 kB / 1.207 GB, free: 9.773 MB / 0.9669 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003558/0.6035, allocations: 1.029 MB / 1.208 GB, free: 8.707 MB / 0.9669 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.008371/0.6119, allocations: 3.268 MB / 1.211 GB, free: 5.316 MB / 0.9669 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.23e-05/0.612, allocations: 4 kB / 1.211 GB, free: 5.312 MB / 0.9669 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.00104/0.613, allocations: 163.7 kB / 1.212 GB, free: 5.152 MB / 0.9669 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001286/0.6143, allocations: 353.2 kB / 1.212 GB, free: 4.809 MB / 0.9669 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.361e-05/0.6144, allocations: 31.97 kB / 1.212 GB, free: 4.777 MB / 0.9669 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.00121/0.6156, allocations: 0.8819 MB / 1.213 GB, free: 3.871 MB / 0.9669 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.871e-06/0.6157, allocations: 4 kB / 1.213 GB, free: 3.867 MB / 0.9669 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.006356/0.622, allocations: 1.89 MB / 1.215 GB, free: 1.898 MB / 0.9669 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0008386/0.6229, allocations: 355 kB / 1.215 GB, free: 1.531 MB / 0.9669 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0004243/0.6233, allocations: 20 kB / 1.215 GB, free: 1.512 MB / 0.9669 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001996/0.6253, allocations: 151.8 kB / 1.215 GB, free: 1.363 MB / 0.9669 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000161/0.6255, allocations: 68.23 kB / 1.215 GB, free: 1.297 MB / 0.9669 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.817e-05/0.6256, allocations: 39.95 kB / 1.215 GB, free: 1.258 MB / 0.9669 GB Notification: Performance of sorting global known variables: time 0.001828/0.6274, allocations: 0.9901 MB / 1.216 GB, free: 276 kB / 0.9669 GB Notification: Performance of sort global known variables: time 1.8e-07/0.6274, allocations: 0 / 1.216 GB, free: 276 kB / 0.9669 GB Notification: Performance of remove unused functions: time 0.002707/0.6302, allocations: 0.8967 MB / 1.217 GB, free: 15.37 MB / 0.9825 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 19 * Number of states: 2 (heaPum.con.vol.dynBal.U,heaPum.eva.vol.dynBal.U) * Number of discrete variables: 4 ($whenCondition1,heaPum.com.isOn,N.T_start,N.count) * Number of discrete states: 2 (N.count,heaPum.com.isOn) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (51): * Single equations (assignments): 46 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 2 * 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 {(2,17)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001429/0.6316, allocations: 0.5538 MB / 1.218 GB, free: 14.82 MB / 0.9825 GB Notification: Performance of simCode: created initialization part: time 0.006882/0.6385, allocations: 1.937 MB / 1.22 GB, free: 12.86 MB / 0.9825 GB Notification: Performance of simCode: created event and clocks part: time 7.524e-06/0.6385, allocations: 3.938 kB / 1.22 GB, free: 12.85 MB / 0.9825 GB Notification: Performance of simCode: created simulation system equations: time 0.002143/0.6407, allocations: 0.5365 MB / 1.22 GB, free: 12.32 MB / 0.9825 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004245/0.6449, allocations: 0.7876 MB / 1.221 GB, free: 11.55 MB / 0.9825 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007358/0.6523, allocations: 3.212 MB / 1.224 GB, free: 8.25 MB / 0.9825 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001365/0.6537, allocations: 1.219 MB / 1.225 GB, free: 7 MB / 0.9825 GB Notification: Performance of simCode: alias equations: time 0.002266/0.656, allocations: 378.4 kB / 1.226 GB, free: 6.641 MB / 0.9825 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005364/0.6565, allocations: 135.3 kB / 1.226 GB, free: 6.508 MB / 0.9825 GB Notification: Performance of SimCode: time 1.773e-06/0.6565, allocations: 0 / 1.226 GB, free: 6.508 MB / 0.9825 GB Notification: Performance of Templates: time 0.5627/1.219, allocations: 37.22 MB / 1.262 GB, free: 167 MB / 0.9981 GB make -j1 -f Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.makefile (rm -f Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.pipe ; mkfifo Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.pipe ; head -c 1048576 < Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.pipe >> ../files/Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.sim & ./Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_3.0.0_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_VariableSpeed.pipe 2>&1)