Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.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/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-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: translateModel(BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger") translateModel(BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001335/0.001335, allocations: 109 kB / 16.41 MB, free: 6.5 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001246/0.001246, allocations: 187 kB / 17.34 MB, free: 5.742 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.239/1.239, allocations: 222.9 MB / 241 MB, free: 15.15 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002001/0.002001, allocations: 293.2 kB / 291.5 MB, free: 14.45 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.9101/0.9101, allocations: 169.3 MB / 0.499 GB, free: 4.43 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001939/0.001939, allocations: 91.86 kB / 0.6821 GB, free: 6.953 MB / 494.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4134/0.4153, allocations: 86.98 MB / 0.7671 GB, free: 3.922 MB / 0.5294 GB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger): time 0.6718/1.087, allocations: 328.4 MB / 1.088 GB, free: 12.36 MB / 0.7325 GB Notification: Performance of NFInst.instExpressions: time 0.03643/1.124, allocations: 30.06 MB / 1.117 GB, free: 1.758 MB / 0.7481 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004756/1.128, allocations: 97.31 kB / 1.117 GB, free: 1.699 MB / 0.7481 GB Notification: Performance of NFTyping.typeComponents: time 0.006229/1.135, allocations: 2.096 MB / 1.119 GB, free: 160 kB / 0.7481 GB Notification: Performance of NFTyping.typeBindings: time 0.01395/1.149, allocations: 4.985 MB / 1.124 GB, free: 11.15 MB / 0.7637 GB Notification: Performance of NFTyping.typeClassSections: time 0.00932/1.158, allocations: 3.654 MB / 1.128 GB, free: 7.512 MB / 0.7637 GB Notification: Performance of NFFlatten.flatten: time 0.01056/1.169, allocations: 6.938 MB / 1.134 GB, free: 0.5469 MB / 0.7637 GB Notification: Performance of NFFlatten.resolveConnections: time 0.004551/1.173, allocations: 2.867 MB / 1.137 GB, free: 13.62 MB / 0.7794 GB Notification: Performance of NFEvalConstants.evaluate: time 0.01315/1.186, allocations: 5.338 MB / 1.142 GB, free: 8.285 MB / 0.7794 GB Notification: Performance of NFSimplifyModel.simplify: time 0.005057/1.192, allocations: 2.431 MB / 1.145 GB, free: 5.859 MB / 0.7794 GB Notification: Performance of NFPackage.collectConstants: time 0.0009269/1.192, allocations: 292 kB / 1.145 GB, free: 5.574 MB / 0.7794 GB Notification: Performance of NFFlatten.collectFunctions: time 0.009929/1.202, allocations: 4.809 MB / 1.15 GB, free: 0.7539 MB / 0.7794 GB Notification: Performance of NFScalarize.scalarize: time 0.001699/1.204, allocations: 1.059 MB / 1.151 GB, free: 15.69 MB / 0.795 GB Notification: Performance of NFVerifyModel.verify: time 0.002698/1.207, allocations: 1.742 MB / 1.153 GB, free: 13.94 MB / 0.795 GB Notification: Performance of NFConvertDAE.convert: time 0.01081/1.218, allocations: 5.753 MB / 1.158 GB, free: 8.172 MB / 0.795 GB Notification: Performance of FrontEnd - DAE generated: time 5.981e-06/1.218, allocations: 8 kB / 1.158 GB, free: 8.164 MB / 0.795 GB Notification: Performance of FrontEnd: time 1.452e-06/1.218, allocations: 0 / 1.158 GB, free: 8.164 MB / 0.795 GB Notification: Performance of Transformations before backend: time 7.143e-05/1.218, allocations: 0 / 1.158 GB, free: 8.164 MB / 0.795 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 536 * Number of variables: 536 Notification: Performance of Generate backend data structure: time 0.007388/1.225, allocations: 3.7 MB / 1.162 GB, free: 4.379 MB / 0.795 GB Notification: Performance of prepare preOptimizeDAE: time 3.998e-05/1.225, allocations: 8.031 kB / 1.162 GB, free: 4.371 MB / 0.795 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00918/1.234, allocations: 1.468 MB / 1.163 GB, free: 2.898 MB / 0.795 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004604/1.239, allocations: 2.073 MB / 1.165 GB, free: 0.7461 MB / 0.795 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001642/1.239, allocations: 172.1 kB / 1.165 GB, free: 0.5742 MB / 0.795 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.00045/1.24, allocations: 216 kB / 1.166 GB, free: 372 kB / 0.795 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.005844/1.246, allocations: 3.049 MB / 1.169 GB, free: 13.18 MB / 0.8106 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.947e-05/1.246, allocations: 0 / 1.169 GB, free: 13.18 MB / 0.8106 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.00023/1.246, allocations: 91.91 kB / 1.169 GB, free: 13.09 MB / 0.8106 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.375e-05/1.246, allocations: 88 kB / 1.169 GB, free: 13 MB / 0.8106 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.006886/1.253, allocations: 3.107 MB / 1.172 GB, free: 9.875 MB / 0.8106 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 0.02213/1.275, allocations: 14.01 MB / 1.186 GB, free: 10.76 MB / 0.8262 GB Notification: Performance of preOpt comSubExp (simulation): time 0.003875/1.279, allocations: 1.641 MB / 1.187 GB, free: 9.113 MB / 0.8262 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001642/1.281, allocations: 0.7776 MB / 1.188 GB, free: 8.336 MB / 0.8262 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005991/1.281, allocations: 317.2 kB / 1.188 GB, free: 7.973 MB / 0.8262 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.874e-05/1.281, allocations: 51.56 kB / 1.188 GB, free: 7.91 MB / 0.8262 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.001053/1.282, allocations: 198.1 kB / 1.188 GB, free: 7.715 MB / 0.8262 GB Notification: Performance of pre-optimization done (n=110): time 3.556e-06/1.282, allocations: 0 / 1.188 GB, free: 7.715 MB / 0.8262 GB Notification: Performance of matching and sorting (n=110): time 0.005837/1.288, allocations: 2.367 MB / 1.191 GB, free: 5.344 MB / 0.8262 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.542e-05/1.288, allocations: 60.41 kB / 1.191 GB, free: 5.273 MB / 0.8262 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00379/1.292, allocations: 2.517 MB / 1.193 GB, free: 2.738 MB / 0.8262 GB Notification: Performance of collectPreVariables (initialization): time 0.0002479/1.292, allocations: 57.7 kB / 1.193 GB, free: 2.676 MB / 0.8262 GB Notification: Performance of collectInitialEqns (initialization): time 0.0009603/1.293, allocations: 1.265 MB / 1.195 GB, free: 1.395 MB / 0.8262 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003421/1.294, allocations: 382.5 kB / 1.195 GB, free: 1.016 MB / 0.8262 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0006476/1.294, allocations: 386.9 kB / 1.195 GB, free: 0.6289 MB / 0.8262 GB Notification: Performance of setup shared object (initialization): time 0.0001249/1.294, allocations: 305.1 kB / 1.196 GB, free: 336 kB / 0.8262 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.002497/1.297, allocations: 0.9532 MB / 1.196 GB, free: 15.37 MB / 0.8419 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002925/1.3, allocations: 1.562 MB / 1.198 GB, free: 13.54 MB / 0.8419 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.004583/1.304, allocations: 2.228 MB / 1.2 GB, free: 11.12 MB / 0.8419 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.119e-05/1.304, allocations: 8 kB / 1.2 GB, free: 11.11 MB / 0.8419 GB Notification: Performance of matching and sorting (n=210) (initialization): time 0.006599/1.311, allocations: 2.747 MB / 1.203 GB, free: 8.344 MB / 0.8419 GB Notification: Performance of prepare postOptimizeDAE: time 7.527e-05/1.311, allocations: 71.39 kB / 1.203 GB, free: 8.262 MB / 0.8419 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.496e-05/1.311, allocations: 23.97 kB / 1.203 GB, free: 8.238 MB / 0.8419 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.753e-05/1.311, allocations: 23.94 kB / 1.203 GB, free: 8.215 MB / 0.8419 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002848/1.314, allocations: 0.546 MB / 1.204 GB, free: 7.668 MB / 0.8419 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00138/1.316, allocations: 2.387 MB / 1.206 GB, free: 5.188 MB / 0.8419 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003253/1.319, allocations: 295.7 kB / 1.206 GB, free: 4.898 MB / 0.8419 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000247/1.319, allocations: 87.95 kB / 1.206 GB, free: 4.812 MB / 0.8419 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.003244/1.322, allocations: 1.382 MB / 1.208 GB, free: 3.426 MB / 0.8419 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002834/1.325, allocations: 1.566 MB / 1.209 GB, free: 1.598 MB / 0.8419 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.004538/1.33, allocations: 2.221 MB / 1.211 GB, free: 15.18 MB / 0.8575 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 9.718e-06/1.33, allocations: 7.938 kB / 1.211 GB, free: 15.18 MB / 0.8575 GB Notification: Performance of matching and sorting (n=210) (initialization_lambda0): time 0.006514/1.336, allocations: 2.735 MB / 1.214 GB, free: 12.42 MB / 0.8575 GB Notification: Performance of prepare postOptimizeDAE: time 6.855e-05/1.336, allocations: 77.89 kB / 1.214 GB, free: 12.33 MB / 0.8575 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.821e-05/1.336, allocations: 12 kB / 1.214 GB, free: 12.32 MB / 0.8575 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.211e-05/1.336, allocations: 20 kB / 1.214 GB, free: 12.3 MB / 0.8575 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002317/1.339, allocations: 0.4954 MB / 1.215 GB, free: 11.8 MB / 0.8575 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.918e-05/1.339, allocations: 31.92 kB / 1.215 GB, free: 11.77 MB / 0.8575 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003199/1.342, allocations: 292.2 kB / 1.215 GB, free: 11.49 MB / 0.8575 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001929/1.342, allocations: 87.95 kB / 1.215 GB, free: 11.4 MB / 0.8575 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 59 * Number of states: 0 () * Number of discrete variables: 4 (masExcRev.i2_w,masExcRev.i1_w,masExcFor.i2_w,masExcFor.i1_w) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (208): * Single equations (assignments): 202 * Array equations: 0 * Algorithm blocks: 2 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 4 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 4 systems {1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.000552/1.343, allocations: 311.1 kB / 1.215 GB, free: 11.09 MB / 0.8575 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005513/1.343, allocations: 256.8 kB / 1.215 GB, free: 10.84 MB / 0.8575 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004395/1.348, allocations: 1.839 MB / 1.217 GB, free: 8.988 MB / 0.8575 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.039e-05/1.348, allocations: 8 kB / 1.217 GB, free: 8.98 MB / 0.8575 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.775e-06/1.348, allocations: 0 / 1.217 GB, free: 8.98 MB / 0.8575 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.369e-05/1.348, allocations: 11.97 kB / 1.217 GB, free: 8.969 MB / 0.8575 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.008667/1.356, allocations: 4.512 MB / 1.222 GB, free: 4.316 MB / 0.8575 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.036e-05/1.356, allocations: 8.125 kB / 1.222 GB, free: 4.309 MB / 0.8575 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001631/1.358, allocations: 303.5 kB / 1.222 GB, free: 4.012 MB / 0.8575 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.517e-05/1.358, allocations: 11.94 kB / 1.222 GB, free: 4 MB / 0.8575 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001008/1.358, allocations: 31.98 kB / 1.222 GB, free: 3.969 MB / 0.8575 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001221/1.359, allocations: 2.368 MB / 1.224 GB, free: 1.508 MB / 0.8575 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.634e-06/1.36, allocations: 12 kB / 1.224 GB, free: 1.496 MB / 0.8575 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004206/1.364, allocations: 1.979 MB / 1.226 GB, free: 15.42 MB / 0.8731 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001272/1.365, allocations: 0.5212 MB / 1.227 GB, free: 14.88 MB / 0.8731 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003513/1.365, allocations: 31.89 kB / 1.227 GB, free: 14.84 MB / 0.8731 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00211/1.367, allocations: 179.8 kB / 1.227 GB, free: 14.67 MB / 0.8731 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000143/1.368, allocations: 80.78 kB / 1.227 GB, free: 14.59 MB / 0.8731 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001377/1.368, allocations: 63.95 kB / 1.227 GB, free: 14.53 MB / 0.8731 GB Notification: Performance of sorting global known variables: time 0.002804/1.371, allocations: 1.735 MB / 1.229 GB, free: 12.79 MB / 0.8731 GB Notification: Performance of sort global known variables: time 3.91e-07/1.371, allocations: 0 / 1.229 GB, free: 12.79 MB / 0.8731 GB Notification: Performance of remove unused functions: time 0.003167/1.374, allocations: 1.283 MB / 1.23 GB, free: 11.5 MB / 0.8731 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 25 * 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 (110): * Single equations (assignments): 106 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 4 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 4 systems {1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0007395/1.375, allocations: 376.5 kB / 1.23 GB, free: 11.15 MB / 0.8731 GB Notification: Performance of simCode: created initialization part: time 0.008387/1.383, allocations: 3.561 MB / 1.234 GB, free: 7.547 MB / 0.8731 GB Notification: Performance of simCode: created event and clocks part: time 1.268e-05/1.383, allocations: 4.562 kB / 1.234 GB, free: 7.543 MB / 0.8731 GB Notification: Performance of simCode: created simulation system equations: time 0.001931/1.385, allocations: 0.8032 MB / 1.235 GB, free: 6.738 MB / 0.8731 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005918/1.391, allocations: 1.199 MB / 1.236 GB, free: 5.547 MB / 0.8731 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00745/1.398, allocations: 4.334 MB / 1.24 GB, free: 1.098 MB / 0.8731 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001163/1.4, allocations: 1.684 MB / 1.242 GB, free: 15.38 MB / 0.8887 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000903/1.4, allocations: 219.3 kB / 1.242 GB, free: 15.16 MB / 0.8887 GB Notification: Performance of SimCode: time 6.51e-07/1.4, allocations: 0 / 1.242 GB, free: 15.16 MB / 0.8887 GB Notification: Performance of Templates: time 0.411/1.811, allocations: 86.5 MB / 1.326 GB, free: 409.3 MB / 0.9512 GB make -j1 -f BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.makefile (rm -f BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.sim & ./BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.Interfaces.Examples.ReverseFlowMassExchanger.pipe 2>&1)