Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_Synchronous 0.93.0-master/package.mo", uses=false) 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/Modelica 3.2.3+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/OpenIPSL 2.0.0/package.mo", uses=false) Using package OpenIPSL with version 2.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 2.0.0/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 Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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) Using package Modelica_Synchronous with version 0.93.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_Synchronous 0.93.0-master/package.mo) Running command: translateModel(OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous") translateModel(OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_Synchronous 0.93.0-master/package.mo): time 0.09535/0.09535, allocations: 12.6 MB / 28.9 MB, free: 0.7461 MB / 19.63 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001347/0.001347, allocations: 111.5 kB / 32.5 MB, free: 3.688 MB / 26.18 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.521/1.521, allocations: 205.1 MB / 241.1 MB, free: 12.38 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001682/0.001682, allocations: 184.5 kB / 291.4 MB, free: 13.4 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 2.0.0/package.mo): time 0.5175/0.5175, allocations: 78.5 MB / 420 MB, free: 11.24 MB / 302.1 MB Notification: Modelica_Synchronous requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: OpenIPSL requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002588/0.002588, allocations: 139.3 kB / 0.5565 GB, free: 28.72 MB / 398.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.151/0.1536, allocations: 68.13 MB / 0.6231 GB, free: 15.53 MB / 446.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous): time 0.008979/0.1627, allocations: 6.616 MB / 0.6295 GB, free: 8.875 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.005334/0.1681, allocations: 1.936 MB / 0.6314 GB, free: 6.934 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001461/0.1696, allocations: 15.94 kB / 0.6314 GB, free: 6.918 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001304/0.1709, allocations: 234 kB / 0.6317 GB, free: 6.688 MB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 0.003596/0.1746, allocations: 0.8075 MB / 0.6324 GB, free: 5.883 MB / 446.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 2.0.0/Electrical/Machines/PSAT/Order4.mo:25:3-30:9:writable] Warning: In relation order4.xq <> order4.x1q, <> on Real numbers is only allowed inside functions. Notification: Performance of NFTyping.typeClassSections: time 0.001974/0.1766, allocations: 0.6197 MB / 0.6331 GB, free: 5.266 MB / 446.1 MB Notification: Performance of NFFlatten.flatten: time 0.002878/0.1794, allocations: 1.588 MB / 0.6346 GB, free: 3.672 MB / 446.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.000764/0.1802, allocations: 326.4 kB / 0.6349 GB, free: 3.34 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.001365/0.1816, allocations: 0.6574 MB / 0.6356 GB, free: 2.68 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001501/0.1831, allocations: 0.8206 MB / 0.6364 GB, free: 1.855 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0005616/0.1837, allocations: 124 kB / 0.6365 GB, free: 1.734 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0009892/0.1847, allocations: 263.8 kB / 0.6367 GB, free: 1.477 MB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0006133/0.1853, allocations: 330.6 kB / 0.637 GB, free: 1.152 MB / 446.1 MB Notification: Performance of NFVerifyModel.verify: time 0.001343/0.1867, allocations: 0.6641 MB / 0.6377 GB, free: 496 kB / 446.1 MB Notification: Performance of NFConvertDAE.convert: time 0.002914/0.1896, allocations: 1.658 MB / 0.6393 GB, free: 14.82 MB / 462.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.901e-06/0.1896, allocations: 7.938 kB / 0.6393 GB, free: 14.81 MB / 462.1 MB Notification: Performance of FrontEnd: time 1.863e-06/0.1896, allocations: 0 / 0.6393 GB, free: 14.81 MB / 462.1 MB Notification: Performance of Transformations before backend: time 7.957e-05/0.1897, allocations: 0 / 0.6393 GB, free: 14.81 MB / 462.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 190 * Number of variables: 190 Notification: Performance of Generate backend data structure: time 0.01048/0.2002, allocations: 2.688 MB / 0.6419 GB, free: 12.06 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.652e-05/0.2003, allocations: 11.98 kB / 0.642 GB, free: 12.05 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.005044/0.2053, allocations: 0.7826 MB / 0.6427 GB, free: 11.26 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002341/0.2077, allocations: 0.8864 MB / 0.6436 GB, free: 10.32 MB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003561/0.2081, allocations: 252.2 kB / 0.6438 GB, free: 10.04 MB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002786/0.2084, allocations: 84 kB / 0.6439 GB, free: 9.953 MB / 462.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002556/0.2109, allocations: 1.09 MB / 0.645 GB, free: 8.852 MB / 462.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.359e-05/0.211, allocations: 0 / 0.645 GB, free: 8.852 MB / 462.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001152/0.2111, allocations: 32 kB / 0.645 GB, free: 8.82 MB / 462.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.382e-05/0.2111, allocations: 20 kB / 0.645 GB, free: 8.801 MB / 462.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00224/0.2134, allocations: 0.9877 MB / 0.646 GB, free: 7.812 MB / 462.1 MB 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 0.00804/0.2214, allocations: 3.808 MB / 0.6497 GB, free: 3.824 MB / 462.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.007565/0.229, allocations: 2.377 MB / 0.652 GB, free: 1.355 MB / 462.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.001457/0.2305, allocations: 0.6761 MB / 0.6527 GB, free: 0.6758 MB / 462.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.000122/0.2307, allocations: 17 kB / 0.6527 GB, free: 0.6602 MB / 462.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001794/0.2325, allocations: 0.8177 MB / 0.6535 GB, free: 15.82 MB / 478.1 MB Notification: Performance of pre-optimization done (n=96): time 4.859e-06/0.2325, allocations: 0 / 0.6535 GB, free: 15.82 MB / 478.1 MB Notification: Performance of matching and sorting (n=96): time 0.02856/0.2611, allocations: 7.077 MB / 0.6604 GB, free: 8.684 MB / 478.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001106/0.2612, allocations: 119.8 kB / 0.6605 GB, free: 8.543 MB / 478.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002319/0.2636, allocations: 1.083 MB / 0.6616 GB, free: 7.445 MB / 478.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0002985/0.2639, allocations: 41.7 kB / 0.6616 GB, free: 7.398 MB / 478.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.00052/0.2644, allocations: 0.4891 MB / 0.6621 GB, free: 6.902 MB / 478.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0006185/0.265, allocations: 355 kB / 0.6624 GB, free: 6.551 MB / 478.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0008058/0.2659, allocations: 287.4 kB / 0.6627 GB, free: 6.266 MB / 478.1 MB Notification: Performance of setup shared object (initialization): time 0.0001377/0.266, allocations: 309.1 kB / 0.663 GB, free: 5.961 MB / 478.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00173/0.2678, allocations: 0.7613 MB / 0.6637 GB, free: 5.199 MB / 478.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001808/0.2696, allocations: 0.9342 MB / 0.6647 GB, free: 4.223 MB / 478.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.02387/0.2935, allocations: 5.579 MB / 0.6701 GB, free: 14.56 MB / 494.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.181e-05/0.2935, allocations: 0 / 0.6701 GB, free: 14.56 MB / 494.1 MB Notification: Performance of matching and sorting (n=196) (initialization): time 0.01417/0.3077, allocations: 4.343 MB / 0.6744 GB, free: 10.19 MB / 494.1 MB Notification: Performance of prepare postOptimizeDAE: time 8.181e-05/0.3078, allocations: 59.39 kB / 0.6744 GB, free: 10.12 MB / 494.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.841e-05/0.3079, allocations: 4 kB / 0.6744 GB, free: 10.11 MB / 494.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.00542/0.3133, allocations: 1.499 MB / 0.6759 GB, free: 8.609 MB / 494.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001617/0.3149, allocations: 299.6 kB / 0.6762 GB, free: 8.316 MB / 494.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01979/0.3347, allocations: 8.262 MB / 0.6842 GB, free: 15.89 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002023/0.3368, allocations: 202.8 kB / 0.6844 GB, free: 15.7 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001321/0.337, allocations: 55.97 kB / 0.6845 GB, free: 15.64 MB / 0.4981 GB Warning: Assuming fixed start value for the following 4 variables: order4.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real order2.delta:VARIABLE(flow=false start = order2.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real order4.delta:VARIABLE(flow=false start = order4.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real order4.e1q:VARIABLE(start = order4.e1q0 unit = "1" fixed = true ) "q-axis transient voltage" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 13 * Number of states: 0 () * Number of discrete variables: 2 ($whenCondition2,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (166): * Single equations (assignments): 163 * Array equations: 0 * Algorithm blocks: 2 * 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): 1 system {(18,13,25.9%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0006632/0.3376, allocations: 300.3 kB / 0.6848 GB, free: 15.33 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002519/0.3379, allocations: 138.3 kB / 0.6849 GB, free: 15.2 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01229/0.3502, allocations: 3.877 MB / 0.6887 GB, free: 11.29 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.82e-05/0.3502, allocations: 12 kB / 0.6887 GB, free: 11.28 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.433e-05/0.3503, allocations: 8 kB / 0.6887 GB, free: 11.27 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.925e-05/0.3503, allocations: 7.969 kB / 0.6887 GB, free: 11.27 MB / 0.4981 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 postOpt removeSimpleEquations (simulation): time 0.01446/0.3648, allocations: 5.448 MB / 0.694 GB, free: 5.707 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.11e-05/0.3648, allocations: 3.938 kB / 0.694 GB, free: 5.703 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.000663/0.3655, allocations: 99.89 kB / 0.6941 GB, free: 5.605 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.005429/0.3709, allocations: 1.609 MB / 0.6957 GB, free: 3.988 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001834/0.3711, allocations: 19.98 kB / 0.6957 GB, free: 3.969 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01992/0.3911, allocations: 9.611 MB / 0.7051 GB, free: 10.07 MB / 0.5137 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.344e-06/0.3911, allocations: 0 / 0.7051 GB, free: 10.07 MB / 0.5137 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01424/0.4053, allocations: 4.727 MB / 0.7097 GB, free: 5.309 MB / 0.5137 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005804/0.406, allocations: 231.1 kB / 0.7099 GB, free: 5.062 MB / 0.5137 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001802/0.4061, allocations: 20.06 kB / 0.71 GB, free: 5.043 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001128/0.4073, allocations: 111.9 kB / 0.7101 GB, free: 4.934 MB / 0.5137 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0006379/0.4079, allocations: 196.8 kB / 0.7103 GB, free: 4.738 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.701e-05/0.408, allocations: 31.98 kB / 0.7103 GB, free: 4.707 MB / 0.5137 GB Notification: Performance of sorting global known variables: time 0.001109/0.4091, allocations: 0.7274 MB / 0.711 GB, free: 3.973 MB / 0.5137 GB Notification: Performance of sort global known variables: time 2.11e-07/0.4091, allocations: 0 / 0.711 GB, free: 3.973 MB / 0.5137 GB Notification: Performance of remove unused functions: time 0.001434/0.4106, allocations: 467.5 kB / 0.7114 GB, free: 3.516 MB / 0.5137 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 10 (order2.delta,order2.w,order4.delta,order4.w,order4.e1q,order4.e1d,aVRTypeII.ExcitationSystem.x_scaled[1],aVRTypeII.derivativeBlock.x,aVRTypeII.firstOrder2.y,aVRTypeII.simpleLagLim.state) * Number of discrete variables: 2 ($whenCondition1,$whenCondition2) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (64): * Single equations (assignments): 61 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(21,11,21.8%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,6)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0002876/0.4109, allocations: 139 kB / 0.7116 GB, free: 3.367 MB / 0.5137 GB Notification: Performance of simCode: created initialization part: time 0.006183/0.4171, allocations: 2.509 MB / 0.714 GB, free: 0.8164 MB / 0.5137 GB Notification: Performance of simCode: created event and clocks part: time 3.877e-06/0.4171, allocations: 0.75 kB / 0.714 GB, free: 0.8164 MB / 0.5137 GB Notification: Performance of simCode: created simulation system equations: time 0.3228/0.7399, allocations: 1.606 MB / 0.7156 GB, free: 86.48 MB / 0.5137 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001281/0.7412, allocations: 114.6 kB / 0.7157 GB, free: 86.48 MB / 0.5137 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004625/0.7459, allocations: 2.276 MB / 0.7179 GB, free: 85.63 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008578/0.7467, allocations: 1.117 MB / 0.719 GB, free: 84.92 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004532/0.7472, allocations: 89.12 kB / 0.7191 GB, free: 84.91 MB / 0.5137 GB Notification: Performance of SimCode: time 1.183e-06/0.7472, allocations: 0.9062 kB / 0.7191 GB, free: 84.91 MB / 0.5137 GB Notification: Performance of Templates: time 0.03956/0.7868, allocations: 23.56 MB / 0.7421 GB, free: 76.49 MB / 0.5137 GB make -j1 -f OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.makefile (rm -f OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.pipe ; mkfifo OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.pipe ; head -c 1048576 < OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.pipe >> ../files/OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.sim & ./OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous -abortSlowSimulation -alarm=480 -lv LOG_STATS > OpenIPSL_2.0.0_OpenIPSL.Examples.PSATSystems.Discretization.FourthOrder_AVRII_Continuous.pipe 2>&1)