Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.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 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo) Running command: "" <> buildModelFMU(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup,fileNamePrefix="Buildings_maint_7_0_x_Buildings_Controls_OBC_ASHRAE_G36_PR1_AHUs_MultiZone_VAV_Economizers_Subsequences_Validation_Modulation_TSup",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup,fileNamePrefix="Buildings_maint_7_0_x_Buildings_Controls_OBC_ASHRAE_G36_PR1_AHUs_MultiZone_VAV_Economizers_Subsequences_Validation_Modulation_TSup",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.369/1.369, allocations: 249.5 MB / 257 MB, free: 6.82 MB / 202.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001026/0.001026, allocations: 183.1 kB / 316.3 MB, free: 3.211 MB / 250.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.37/1.37, allocations: 205.3 MB / 0.5671 GB, free: 15.86 MB / 426.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0007853/0.0007853, allocations: 86.48 kB / 0.6714 GB, free: 4.977 MB / 0.5105 GB Notification: Performance of FrontEnd - loaded program: time 2.234e-05/2.235e-05, allocations: 4 kB / 0.7816 GB, free: 102.5 MB / 0.5417 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1811/0.1812, allocations: 106.3 MB / 0.8854 GB, free: 12.06 MB / 0.5573 GB Notification: Performance of FrontEnd - scodeFlatten: time 0.6602/0.8414, allocations: 133.3 MB / 1.016 GB, free: 4.035 MB / 0.6355 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0002834/0.8418, allocations: 81.75 kB / 1.016 GB, free: 3.988 MB / 0.6355 GB Notification: Performance of FrontEnd - DAE generated: time 0.0128/0.8546, allocations: 5.019 MB / 1.021 GB, free: 15.71 MB / 0.6511 GB Notification: Performance of FrontEnd: time 1.453e-06/0.8546, allocations: 0 / 1.021 GB, free: 15.71 MB / 0.6511 GB Notification: Performance of Transformations before backend: time 2.142e-05/0.8547, allocations: 8 kB / 1.021 GB, free: 15.7 MB / 0.6511 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 109 * Number of variables: 109 Notification: Performance of Generate backend data structure: time 0.001122/0.8558, allocations: 0.6726 MB / 1.021 GB, free: 15.01 MB / 0.6511 GB Notification: Performance of prepare preOptimizeDAE: time 5.86e-05/0.8559, allocations: 12.03 kB / 1.021 GB, free: 15 MB / 0.6511 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001031/0.856, allocations: 51.61 kB / 1.021 GB, free: 14.95 MB / 0.6511 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004133/0.8564, allocations: 342.8 kB / 1.022 GB, free: 14.62 MB / 0.6511 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.094e-05/0.8564, allocations: 16 kB / 1.022 GB, free: 14.61 MB / 0.6511 GB Notification: Performance of preOpt expandDerOperator (simulation): time 6.112e-05/0.8565, allocations: 38.61 kB / 1.022 GB, free: 14.57 MB / 0.6511 GB Notification: Performance of preOpt removeEqualFunctionCalls (simulation): time 0.0004747/0.857, allocations: 281.9 kB / 1.022 GB, free: 14.41 MB / 0.6511 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.000628/0.8576, allocations: 349.9 kB / 1.022 GB, free: 14.16 MB / 0.6511 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.371e-05/0.8576, allocations: 0 / 1.022 GB, free: 14.16 MB / 0.6511 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.653e-05/0.8577, allocations: 3.562 kB / 1.022 GB, free: 14.16 MB / 0.6511 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.253e-05/0.8577, allocations: 15.94 kB / 1.022 GB, free: 14.14 MB / 0.6511 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001943/0.8597, allocations: 1.156 MB / 1.023 GB, free: 13.2 MB / 0.6511 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0003898/0.8601, allocations: 315.6 kB / 1.024 GB, free: 13.01 MB / 0.6511 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001979/0.8603, allocations: 141.3 kB / 1.024 GB, free: 12.93 MB / 0.6511 GB Notification: Performance of preOpt evalFunc (simulation): time 3.523e-05/0.8603, allocations: 8.359 kB / 1.024 GB, free: 12.92 MB / 0.6511 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0004016/0.8607, allocations: 273.5 kB / 1.024 GB, free: 12.7 MB / 0.6511 GB Notification: Performance of pre-optimization done (n=49): time 1.834e-06/0.8607, allocations: 4 kB / 1.024 GB, free: 12.7 MB / 0.6511 GB Notification: Performance of matching and sorting (n=49): time 0.0006926/0.8614, allocations: 419.2 kB / 1.024 GB, free: 12.38 MB / 0.6511 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001333/0.8616, allocations: 181.3 kB / 1.025 GB, free: 12.18 MB / 0.6511 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002372/0.8618, allocations: 217.3 kB / 1.025 GB, free: 12 MB / 0.6511 GB Notification: Performance of collectPreVariables (initialization): time 5.083e-05/0.8619, allocations: 48.56 kB / 1.025 GB, free: 11.96 MB / 0.6511 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001362/0.862, allocations: 207 kB / 1.025 GB, free: 11.78 MB / 0.6511 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001092/0.8621, allocations: 127.3 kB / 1.025 GB, free: 11.68 MB / 0.6511 GB Notification: Performance of simplifyInitialFunctions (initialization): time 1.746e-05/0.8622, allocations: 0 / 1.025 GB, free: 11.68 MB / 0.6511 GB Notification: Performance of setup shared object (initialization): time 0.0001313/0.8623, allocations: 344.4 kB / 1.026 GB, free: 11.34 MB / 0.6511 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001952/0.8625, allocations: 126.1 kB / 1.026 GB, free: 11.27 MB / 0.6511 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002909/0.8628, allocations: 265.6 kB / 1.026 GB, free: 11.03 MB / 0.6511 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0002586/0.8631, allocations: 165.7 kB / 1.026 GB, free: 10.93 MB / 0.6511 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.905e-06/0.8631, allocations: 4 kB / 1.026 GB, free: 10.92 MB / 0.6511 GB Notification: Performance of matching and sorting (n=77) (initialization): time 0.0006206/0.8637, allocations: 434 kB / 1.027 GB, free: 10.59 MB / 0.6511 GB Notification: Performance of prepare postOptimizeDAE: time 1.956e-05/0.8637, allocations: 7.984 kB / 1.027 GB, free: 10.59 MB / 0.6511 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.998e-06/0.8637, allocations: 4.375 kB / 1.027 GB, free: 10.58 MB / 0.6511 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.74e-05/0.8638, allocations: 15.94 kB / 1.027 GB, free: 10.57 MB / 0.6511 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003782/0.8642, allocations: 91.77 kB / 1.027 GB, free: 10.48 MB / 0.6511 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.258e-06/0.8642, allocations: 4 kB / 1.027 GB, free: 10.48 MB / 0.6511 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000249/0.8644, allocations: 55.08 kB / 1.027 GB, free: 10.43 MB / 0.6511 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.246e-05/0.8645, allocations: 18.94 kB / 1.027 GB, free: 10.41 MB / 0.6511 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 13 * Number of states: 0 () * Number of discrete variables: 48 ($PRE.modFre.firOrdHolRetDam.firstTrigger,modFre.firOrdHolRetDam.firstTrigger,$PRE.modFre.firOrdHolOutDam.firstTrigger,modFre.firOrdHolOutDam.firstTrigger,$PRE.mod.firOrdHolRetDam.firstTrigger,mod.firOrdHolRetDam.firstTrigger,$PRE.mod.firOrdHolOutDam.firstTrigger,mod.firOrdHolOutDam.firstTrigger,$whenCondition1,mod.firOrdHolOutDam.sampleTrigger,$whenCondition2,mod.firOrdHolRetDam.sampleTrigger,$whenCondition3,modFre.firOrdHolOutDam.sampleTrigger,$whenCondition4,modFre.firOrdHolRetDam.sampleTrigger,$PRE.mod.firOrdHolOutDam.tSample,mod.firOrdHolOutDam.tSample,$PRE.mod.firOrdHolOutDam.uSample,mod.firOrdHolOutDam.uSample,$PRE.mod.firOrdHolOutDam.pre_uSample,mod.firOrdHolOutDam.pre_uSample,$PRE.mod.firOrdHolOutDam.c,mod.firOrdHolOutDam.c,$PRE.mod.firOrdHolRetDam.tSample,mod.firOrdHolRetDam.tSample,$PRE.mod.firOrdHolRetDam.uSample,mod.firOrdHolRetDam.uSample,$PRE.mod.firOrdHolRetDam.pre_uSample,mod.firOrdHolRetDam.pre_uSample,$PRE.mod.firOrdHolRetDam.c,mod.firOrdHolRetDam.c,$PRE.modFre.firOrdHolOutDam.tSample,modFre.firOrdHolOutDam.tSample,$PRE.modFre.firOrdHolOutDam.uSample,modFre.firOrdHolOutDam.uSample,$PRE.modFre.firOrdHolOutDam.pre_uSample,modFre.firOrdHolOutDam.pre_uSample,$PRE.modFre.firOrdHolOutDam.c,modFre.firOrdHolOutDam.c,$PRE.modFre.firOrdHolRetDam.tSample,modFre.firOrdHolRetDam.tSample,$PRE.modFre.firOrdHolRetDam.uSample,modFre.firOrdHolRetDam.uSample,$PRE.modFre.firOrdHolRetDam.pre_uSample,modFre.firOrdHolRetDam.pre_uSample,$PRE.modFre.firOrdHolRetDam.c,modFre.firOrdHolRetDam.c) * Number of discrete states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (77): * Single equations (assignments): 77 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001635/0.8646, allocations: 163.8 kB / 1.027 GB, free: 10.25 MB / 0.6511 GB Notification: Performance of postOpt createAliasVarsForOutputStates (simulation): time 0.000579/0.8652, allocations: 425 kB / 1.027 GB, free: 9.938 MB / 0.6511 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.557e-05/0.8653, allocations: 31.61 kB / 1.027 GB, free: 9.906 MB / 0.6511 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0007265/0.866, allocations: 473.8 kB / 1.028 GB, free: 9.555 MB / 0.6511 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.64e-06/0.866, allocations: 4 kB / 1.028 GB, free: 9.551 MB / 0.6511 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.597e-06/0.866, allocations: 0 / 1.028 GB, free: 9.551 MB / 0.6511 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.863e-06/0.8661, allocations: 3.984 kB / 1.028 GB, free: 9.547 MB / 0.6511 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001242/0.8673, allocations: 1.032 MB / 1.029 GB, free: 8.703 MB / 0.6511 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.735e-06/0.8673, allocations: 0 / 1.029 GB, free: 8.703 MB / 0.6511 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002273/0.8675, allocations: 55.34 kB / 1.029 GB, free: 8.652 MB / 0.6511 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.27e-06/0.8676, allocations: 4.875 kB / 1.029 GB, free: 8.648 MB / 0.6511 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.267e-05/0.8676, allocations: 15.42 kB / 1.029 GB, free: 8.637 MB / 0.6511 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.728e-06/0.8676, allocations: 8.078 kB / 1.029 GB, free: 8.629 MB / 0.6511 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.649e-06/0.8676, allocations: 7.984 kB / 1.029 GB, free: 8.621 MB / 0.6511 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006928/0.8683, allocations: 0.6153 MB / 1.029 GB, free: 8.078 MB / 0.6511 GB Notification: Performance of postOpt removeConstants (simulation): time 7.904e-05/0.8684, allocations: 115.7 kB / 1.03 GB, free: 7.949 MB / 0.6511 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.352e-05/0.8685, allocations: 11.61 kB / 1.03 GB, free: 7.941 MB / 0.6511 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002801/0.8688, allocations: 39.95 kB / 1.03 GB, free: 7.902 MB / 0.6511 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.378e-05/0.8688, allocations: 36.08 kB / 1.03 GB, free: 7.867 MB / 0.6511 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.686e-05/0.8689, allocations: 15.25 kB / 1.03 GB, free: 7.855 MB / 0.6511 GB Notification: Performance of sorting global known variables: time 0.0001537/0.869, allocations: 175 kB / 1.03 GB, free: 7.719 MB / 0.6511 GB Notification: Performance of sort global known variables: time 1.3e-07/0.869, allocations: 0 / 1.03 GB, free: 7.719 MB / 0.6511 GB Notification: Performance of remove unused functions: time 0.0004032/0.8694, allocations: 103.6 kB / 1.03 GB, free: 7.617 MB / 0.6511 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 0 () * Number of discrete variables: 28 (modFre.firOrdHolRetDam.sampleTrigger,modFre.firOrdHolOutDam.sampleTrigger,mod.firOrdHolRetDam.sampleTrigger,mod.firOrdHolOutDam.sampleTrigger,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,mod.firOrdHolOutDam.firstTrigger,mod.firOrdHolOutDam.tSample,mod.firOrdHolOutDam.uSample,mod.firOrdHolOutDam.pre_uSample,mod.firOrdHolOutDam.c,mod.firOrdHolRetDam.firstTrigger,mod.firOrdHolRetDam.tSample,mod.firOrdHolRetDam.uSample,mod.firOrdHolRetDam.pre_uSample,mod.firOrdHolRetDam.c,modFre.firOrdHolOutDam.firstTrigger,modFre.firOrdHolOutDam.tSample,modFre.firOrdHolOutDam.uSample,modFre.firOrdHolOutDam.pre_uSample,modFre.firOrdHolOutDam.c,modFre.firOrdHolRetDam.firstTrigger,modFre.firOrdHolRetDam.tSample,modFre.firOrdHolRetDam.uSample,modFre.firOrdHolRetDam.pre_uSample,modFre.firOrdHolRetDam.c) * Number of discrete states: 8 (modFre.firOrdHolRetDam.uSample,modFre.firOrdHolRetDam.c,modFre.firOrdHolOutDam.uSample,modFre.firOrdHolOutDam.c,mod.firOrdHolRetDam.uSample,mod.firOrdHolRetDam.c,mod.firOrdHolOutDam.uSample,mod.firOrdHolOutDam.c) * Top-level inputs: 0 Notification: Strong component statistics for simulation (53): * Single equations (assignments): 33 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 20 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001079/0.8705, allocations: 1.474 MB / 1.031 GB, free: 6.227 MB / 0.6511 GB Notification: Performance of simCode: created initialization part: time 0.0005148/0.8711, allocations: 360 kB / 1.032 GB, free: 5.98 MB / 0.6511 GB Notification: Performance of simCode: created event and clocks part: time 2.164e-06/0.8711, allocations: 0 / 1.032 GB, free: 5.98 MB / 0.6511 GB Notification: Performance of simCode: created simulation system equations: time 0.0002405/0.8713, allocations: 181.5 kB / 1.032 GB, free: 5.863 MB / 0.6511 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004025/0.8717, allocations: 59.34 kB / 1.032 GB, free: 5.816 MB / 0.6511 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001076/0.8728, allocations: 0.5616 MB / 1.032 GB, free: 5.281 MB / 0.6511 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004031/0.8732, allocations: 0.8171 MB / 1.033 GB, free: 4.438 MB / 0.6511 GB Notification: Performance of simCode: alias equations: time 0.0001495/0.8734, allocations: 47.27 kB / 1.033 GB, free: 4.391 MB / 0.6511 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001803/0.8736, allocations: 137.8 kB / 1.033 GB, free: 4.348 MB / 0.6511 GB Notification: Performance of SimCode: time 2.51e-07/0.8736, allocations: 8 kB / 1.033 GB, free: 4.34 MB / 0.6511 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.02583/0.8994, allocations: 6.754 MB / 1.04 GB, free: 13.69 MB / 0.6667 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001836/0.8996, allocations: 225.8 kB / 1.04 GB, free: 13.4 MB / 0.6667 GB Notification: Performance of buildModelFMU: Generate platform static: time 1.913/2.813, allocations: 4 kB / 1.04 GB, free: 13.4 MB / 0.6667 GB (rm -f Buildings_maint.7.0.x_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_maint_7_0_x_Buildings_Controls_OBC_ASHRAE_G36_PR1_AHUs_MultiZone_VAV_Economizers_Subsequences_Validation_Modulation_TSup_fmu --startTime=0 --stopTime=900 --timeout=50 --tolerance=1e-06 Buildings_maint_7_0_x_Buildings_Controls_OBC_ASHRAE_G36_PR1_AHUs_MultiZone_VAV_Economizers_Subsequences_Validation_Modulation_TSup.fmu > Buildings_maint.7.0.x_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.Economizers.Subsequences.Validation.Modulation_TSup.pipe 2>&1)