Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y.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/IDEAS 3.0.0-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-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: "" <> buildModelFMU(IDEAS.Fluid.Chillers.Examples.Carnot_y,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_y",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Chillers.Examples.Carnot_y,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_y",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 0.005208/0.005212, allocations: 99.92 kB / 15.73 MB, free: 6.008 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001418/0.001418, allocations: 195.2 kB / 16.68 MB, free: 5.93 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.404/1.404, allocations: 222.9 MB / 240.4 MB, free: 15.08 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.8589/0.8589, allocations: 135.6 MB / 426.1 MB, free: 3.625 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001947/0.001947, allocations: 67.05 kB / 0.5857 GB, free: 21.38 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1426/0.1445, allocations: 81.04 MB / 0.6649 GB, free: 5.637 MB / 0.4981 GB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Chillers.Examples.Carnot_y): time 0.08176/0.2263, allocations: 75.12 MB / 0.7382 GB, free: 10.26 MB / 0.5762 GB Notification: Performance of NFInst.instExpressions: time 0.3205/0.5468, allocations: 12.71 MB / 0.7506 GB, free: 25.7 MB / 0.5762 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001935/0.5488, allocations: 71.59 kB / 0.7507 GB, free: 25.7 MB / 0.5762 GB Notification: Performance of NFTyping.typeComponents: time 0.001919/0.5507, allocations: 0.8289 MB / 0.7515 GB, free: 25.7 MB / 0.5762 GB Notification: Performance of NFTyping.typeBindings: time 0.00584/0.5566, allocations: 2.461 MB / 0.7539 GB, free: 25.61 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.003124/0.5597, allocations: 1.387 MB / 0.7553 GB, free: 25.58 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.005731/0.5655, allocations: 4.385 MB / 0.7596 GB, free: 25.58 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002437/0.568, allocations: 1.439 MB / 0.761 GB, free: 25.42 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00427/0.5722, allocations: 1.624 MB / 0.7625 GB, free: 25.35 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002551/0.5748, allocations: 1.193 MB / 0.7637 GB, free: 25.13 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0004525/0.5753, allocations: 163.1 kB / 0.7639 GB, free: 25.13 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003544/0.5788, allocations: 1.407 MB / 0.7652 GB, free: 25.11 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004454/0.5793, allocations: 403.5 kB / 0.7656 GB, free: 25.05 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.001462/0.5808, allocations: 0.9001 MB / 0.7665 GB, free: 24.82 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.005271/0.586, allocations: 2.886 MB / 0.7693 GB, free: 24.46 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 4.198e-06/0.5861, allocations: 0 / 0.7693 GB, free: 24.46 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.403e-06/0.5861, allocations: 0 / 0.7693 GB, free: 24.46 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 4.938e-05/0.5861, allocations: 0 / 0.7693 GB, free: 24.46 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 240 * Number of variables: 240 Notification: Performance of Generate backend data structure: time 0.004027/0.5902, allocations: 2.145 MB / 0.7714 GB, free: 23.36 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.711e-05/0.5902, allocations: 9.484 kB / 0.7714 GB, free: 23.36 MB / 0.5762 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001552/0.5904, allocations: 148.3 kB / 0.7716 GB, free: 23.32 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0008323/0.5912, allocations: 236.7 kB / 0.7718 GB, free: 23.23 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002343/0.5936, allocations: 1.528 MB / 0.7733 GB, free: 22.8 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.125e-05/0.5936, allocations: 79.31 kB / 0.7734 GB, free: 22.8 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001555/0.5938, allocations: 109.6 kB / 0.7735 GB, free: 22.79 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001971/0.5958, allocations: 1.102 MB / 0.7745 GB, free: 22.65 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.925e-05/0.5958, allocations: 1.156 kB / 0.7745 GB, free: 22.65 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.159e-05/0.5959, allocations: 38.31 kB / 0.7746 GB, free: 22.65 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.499e-05/0.596, allocations: 29.38 kB / 0.7746 GB, free: 22.65 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001828/0.5978, allocations: 0.8894 MB / 0.7755 GB, free: 22.64 MB / 0.5762 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 0.005447/0.6033, allocations: 4.915 MB / 0.7803 GB, free: 20.08 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001332/0.6046, allocations: 0.6147 MB / 0.7809 GB, free: 19.87 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006703/0.6053, allocations: 356.7 kB / 0.7812 GB, free: 19.75 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004147/0.6057, allocations: 0.827 MB / 0.782 GB, free: 18.8 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 1.977e-05/0.6057, allocations: 38.72 kB / 0.7821 GB, free: 18.75 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=61): time 2.124e-06/0.6058, allocations: 0 / 0.7821 GB, free: 18.75 MB / 0.5762 GB Notification: Performance of matching and sorting (n=61): time 0.007403/0.6132, allocations: 1.679 MB / 0.7837 GB, free: 18.26 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.394e-05/0.6132, allocations: 65.62 kB / 0.7838 GB, free: 18.19 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001575/0.6148, allocations: 1.225 MB / 0.785 GB, free: 17.69 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.000107/0.6149, allocations: 38.08 kB / 0.785 GB, free: 17.65 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003787/0.6153, allocations: 0.6119 MB / 0.7856 GB, free: 17.16 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001631/0.6155, allocations: 233 kB / 0.7858 GB, free: 16.98 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000204/0.6157, allocations: 157.2 kB / 0.786 GB, free: 16.91 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 4.702e-05/0.6157, allocations: 328.9 kB / 0.7863 GB, free: 16.6 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006368/0.6164, allocations: 292.4 kB / 0.7866 GB, free: 16.5 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007673/0.6171, allocations: 494.5 kB / 0.787 GB, free: 16.19 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00134/0.6185, allocations: 0.7096 MB / 0.7877 GB, free: 15.78 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.947e-06/0.6185, allocations: 1.562 kB / 0.7877 GB, free: 15.78 MB / 0.5762 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.004648/0.6232, allocations: 1.287 MB / 0.789 GB, free: 15.16 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.69e-05/0.6232, allocations: 5.781 kB / 0.789 GB, free: 15.16 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.316e-06/0.6232, allocations: 5.094 kB / 0.789 GB, free: 15.16 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005531/0.6238, allocations: 140.9 kB / 0.7891 GB, free: 15.09 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005669/0.6243, allocations: 161.1 kB / 0.7893 GB, free: 15.06 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0006578/0.625, allocations: 0.6925 MB / 0.79 GB, free: 14.45 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001057/0.6261, allocations: 123.8 kB / 0.7901 GB, free: 14.37 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.546e-05/0.6262, allocations: 32.81 kB / 0.7901 GB, free: 14.36 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0009433/0.6271, allocations: 0.5539 MB / 0.7906 GB, free: 14.02 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0006888/0.6278, allocations: 488.6 kB / 0.7911 GB, free: 13.66 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001221/0.629, allocations: 0.7038 MB / 0.7918 GB, free: 13.23 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.384e-06/0.629, allocations: 0 / 0.7918 GB, free: 13.23 MB / 0.5762 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.0045/0.6336, allocations: 1.271 MB / 0.793 GB, free: 12.62 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.05e-05/0.6336, allocations: 6.75 kB / 0.793 GB, free: 12.62 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.249e-06/0.6336, allocations: 5.656 kB / 0.793 GB, free: 12.62 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004808/0.6341, allocations: 132.7 kB / 0.7932 GB, free: 12.56 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000553/0.6346, allocations: 163.1 kB / 0.7933 GB, free: 12.52 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0006303/0.6353, allocations: 0.6964 MB / 0.794 GB, free: 11.91 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001046/0.6363, allocations: 101.8 kB / 0.7941 GB, free: 11.85 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.198e-05/0.6364, allocations: 36.33 kB / 0.7941 GB, free: 11.84 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * 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 initialization (79): * Single equations (assignments): 78 * Array equations: 0 * Algorithm blocks: 0 * 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 {(1,9)} Notification: Performance of prepare postOptimizeDAE: time 0.0001961/0.6366, allocations: 221.8 kB / 0.7944 GB, free: 11.63 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002071/0.6368, allocations: 143.1 kB / 0.7945 GB, free: 11.55 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00457/0.6414, allocations: 1.271 MB / 0.7957 GB, free: 10.86 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.382e-05/0.6414, allocations: 6.125 kB / 0.7957 GB, free: 10.86 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.749e-06/0.6414, allocations: 0 / 0.7957 GB, free: 10.86 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.004055/0.6455, allocations: 1.102 MB / 0.7968 GB, free: 10.24 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006057/0.6516, allocations: 2.616 MB / 0.7994 GB, free: 8.473 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.422e-06/0.6516, allocations: 6.594 kB / 0.7994 GB, free: 8.469 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.000449/0.652, allocations: 113.3 kB / 0.7995 GB, free: 8.445 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004548/0.6525, allocations: 128.5 kB / 0.7996 GB, free: 8.387 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.461e-05/0.6526, allocations: 28.14 kB / 0.7996 GB, free: 8.367 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.004411/0.657, allocations: 2.571 MB / 0.8021 GB, free: 6.191 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.708e-06/0.657, allocations: 9.875 kB / 0.8022 GB, free: 6.188 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005052/0.6621, allocations: 1.702 MB / 0.8038 GB, free: 5.164 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005628/0.6626, allocations: 316.7 kB / 0.8041 GB, free: 4.891 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001923/0.6628, allocations: 24.2 kB / 0.8041 GB, free: 4.875 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007964/0.6636, allocations: 61.48 kB / 0.8042 GB, free: 4.84 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001123/0.6638, allocations: 55.69 kB / 0.8042 GB, free: 4.809 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.732e-05/0.6638, allocations: 34.31 kB / 0.8043 GB, free: 4.797 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.001032/0.6649, allocations: 0.8796 MB / 0.8051 GB, free: 4.305 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.41e-07/0.6649, allocations: 0 / 0.8051 GB, free: 4.305 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.001748/0.6666, allocations: 0.7258 MB / 0.8059 GB, free: 4.148 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 2 (chi.con.vol.dynBal.U,chi.eva.vol.dynBal.U) * 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 (56): * Single equations (assignments): 51 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * 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 {(1,9)} Notification: Performance of Backend phase and start with SimCode phase: time 0.005783/0.6724, allocations: 2.599 MB / 0.8084 GB, free: 1.797 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.002373/0.6748, allocations: 1.115 MB / 0.8095 GB, free: 0.6914 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 6.973e-06/0.6748, allocations: 4 kB / 0.8095 GB, free: 0.6875 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.001379/0.6762, allocations: 0.5717 MB / 0.81 GB, free: 116 kB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003927/0.6802, allocations: 0.7924 MB / 0.8108 GB, free: 15.34 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02154/0.7017, allocations: 9.837 MB / 0.8204 GB, free: 5.262 MB / 0.5919 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009107/0.7026, allocations: 1.176 MB / 0.8216 GB, free: 4.059 MB / 0.5919 GB Notification: Performance of simCode: alias equations: time 0.00119/0.7038, allocations: 299 kB / 0.8219 GB, free: 3.762 MB / 0.5919 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007633/0.7046, allocations: 0.5071 MB / 0.8223 GB, free: 3.254 MB / 0.5919 GB Notification: Performance of SimCode: time 4.41e-07/0.7046, allocations: 0 / 0.8223 GB, free: 3.254 MB / 0.5919 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.08741/0.7921, allocations: 42.42 MB / 0.8638 GB, free: 9.297 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.94/14.74, allocations: 7.484 kB / 0.8638 GB, free: 9.293 MB / 0.6387 GB (rm -f IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y.sim & python3 -m fmpy simulate --output-file IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y_res.csv --start-time 0 --stop-time 3600 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 1.44 IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_y.fmu > IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_y.pipe 2>&1)