Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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 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(Buildings.Electrical.DC.Lines.Examples.DCLine,fileNamePrefix="Buildings_8_Buildings_Electrical_DC_Lines_Examples_DCLine",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Electrical.DC.Lines.Examples.DCLine,fileNamePrefix="Buildings_8_Buildings_Electrical_DC_Lines_Examples_DCLine",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 0.001696/0.001696, allocations: 109.4 kB / 15.69 MB, free: 128 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002285/0.002285, allocations: 189.5 kB / 16.62 MB, free: 6.613 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.404/1.404, allocations: 205.1 MB / 222.5 MB, free: 4.551 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.667/1.667, allocations: 292.3 MB / 0.549 GB, free: 12.73 MB / 462.1 MB 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: Performance of FrontEnd - loaded program: time 0.001449/0.001449, allocations: 65.23 kB / 0.6718 GB, free: 26.2 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2106/0.2121, allocations: 114.5 MB / 0.7836 GB, free: 13.25 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.DC.Lines.Examples.DCLine): time 0.007385/0.2195, allocations: 6.237 MB / 0.7897 GB, free: 6.973 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.005753/0.2253, allocations: 4.577 MB / 0.7942 GB, free: 2.379 MB / 0.6075 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0003704/0.2258, allocations: 23.88 kB / 0.7942 GB, free: 2.355 MB / 0.6075 GB Notification: Performance of NFTyping.typeComponents: time 0.002136/0.2279, allocations: 0.9175 MB / 0.7951 GB, free: 1.438 MB / 0.6075 GB Notification: Performance of NFTyping.typeBindings: time 0.001724/0.2297, allocations: 0.766 MB / 0.7958 GB, free: 0.668 MB / 0.6075 GB Notification: Performance of NFTyping.typeClassSections: time 0.0006408/0.2303, allocations: 326.5 kB / 0.7962 GB, free: 360 kB / 0.6075 GB Notification: Performance of NFFlatten.flatten: time 0.001155/0.2315, allocations: 1.133 MB / 0.7973 GB, free: 15.21 MB / 0.6231 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0007476/0.2322, allocations: 0.6812 MB / 0.7979 GB, free: 14.53 MB / 0.6231 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0004562/0.2327, allocations: 478.3 kB / 0.7984 GB, free: 14.06 MB / 0.6231 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0005947/0.2333, allocations: 0.4903 MB / 0.7989 GB, free: 13.57 MB / 0.6231 GB Notification: Performance of NFPackage.collectConstants: time 8.733e-05/0.2334, allocations: 72 kB / 0.7989 GB, free: 13.5 MB / 0.6231 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0004498/0.2338, allocations: 275.5 kB / 0.7992 GB, free: 13.23 MB / 0.6231 GB Notification: Performance of NFScalarize.scalarize: time 0.0002031/0.2341, allocations: 255.2 kB / 0.7994 GB, free: 12.98 MB / 0.6231 GB Notification: Performance of NFVerifyModel.verify: time 0.0003386/0.2344, allocations: 402 kB / 0.7998 GB, free: 12.59 MB / 0.6231 GB Notification: Performance of NFConvertDAE.convert: time 0.000919/0.2353, allocations: 1.075 MB / 0.8009 GB, free: 11.51 MB / 0.6231 GB Notification: Performance of FrontEnd - DAE generated: time 5.11e-06/0.2353, allocations: 3.984 kB / 0.8009 GB, free: 11.5 MB / 0.6231 GB Notification: Performance of FrontEnd: time 1.203e-06/0.2354, allocations: 4 kB / 0.8009 GB, free: 11.5 MB / 0.6231 GB Notification: Performance of Transformations before backend: time 9.458e-06/0.2354, allocations: 0 / 0.8009 GB, free: 11.5 MB / 0.6231 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 142 * Number of variables: 142 Notification: Performance of Generate backend data structure: time 0.001605/0.237, allocations: 1.09 MB / 0.8019 GB, free: 10.36 MB / 0.6231 GB Notification: Performance of prepare preOptimizeDAE: time 3.6e-05/0.237, allocations: 12.03 kB / 0.802 GB, free: 10.35 MB / 0.6231 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.000107/0.2371, allocations: 102.7 kB / 0.8021 GB, free: 10.24 MB / 0.6231 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003044/0.2402, allocations: 0.632 MB / 0.8027 GB, free: 9.605 MB / 0.6231 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0007834/0.241, allocations: 0.5735 MB / 0.8032 GB, free: 8.992 MB / 0.6231 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.15e-05/0.241, allocations: 41.69 kB / 0.8033 GB, free: 8.949 MB / 0.6231 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.034e-05/0.2411, allocations: 55.88 kB / 0.8033 GB, free: 8.895 MB / 0.6231 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001791/0.2429, allocations: 1.018 MB / 0.8043 GB, free: 7.836 MB / 0.6231 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.53e-05/0.2429, allocations: 0 / 0.8043 GB, free: 7.836 MB / 0.6231 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.245e-05/0.243, allocations: 24 kB / 0.8043 GB, free: 7.812 MB / 0.6231 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.437e-05/0.2431, allocations: 53.28 kB / 0.8044 GB, free: 7.762 MB / 0.6231 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002223/0.2453, allocations: 1 MB / 0.8054 GB, free: 6.762 MB / 0.6231 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.003709/0.249, allocations: 3.486 MB / 0.8088 GB, free: 2.965 MB / 0.6231 GB Notification: Performance of preOpt comSubExp (simulation): time 0.00135/0.2504, allocations: 497.7 kB / 0.8092 GB, free: 2.473 MB / 0.6231 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005179/0.2509, allocations: 228.7 kB / 0.8095 GB, free: 2.246 MB / 0.6231 GB Notification: Performance of preOpt evalFunc (simulation): time 3.372e-05/0.251, allocations: 4 kB / 0.8095 GB, free: 2.242 MB / 0.6231 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.911e-05/0.2511, allocations: 34.56 kB / 0.8095 GB, free: 2.199 MB / 0.6231 GB Notification: Performance of pre-optimization done (n=31): time 1.553e-06/0.2511, allocations: 7.938 kB / 0.8095 GB, free: 2.191 MB / 0.6231 GB Notification: Performance of matching and sorting (n=43): time 0.00661/0.2577, allocations: 2.022 MB / 0.8115 GB, free: 128 kB / 0.6231 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.821e-05/0.2577, allocations: 59.34 kB / 0.8115 GB, free: 56 kB / 0.6231 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007119/0.2585, allocations: 0.5667 MB / 0.8121 GB, free: 15.48 MB / 0.6387 GB Notification: Performance of collectPreVariables (initialization): time 4.376e-05/0.2585, allocations: 33.7 kB / 0.8121 GB, free: 15.44 MB / 0.6387 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002442/0.2588, allocations: 356.2 kB / 0.8125 GB, free: 15.08 MB / 0.6387 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001223/0.2589, allocations: 149.8 kB / 0.8126 GB, free: 14.94 MB / 0.6387 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001701/0.2591, allocations: 90.16 kB / 0.8127 GB, free: 14.84 MB / 0.6387 GB Notification: Performance of setup shared object (initialization): time 0.0001412/0.2592, allocations: 374.7 kB / 0.8131 GB, free: 14.47 MB / 0.6387 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006401/0.2599, allocations: 258.9 kB / 0.8133 GB, free: 14.21 MB / 0.6387 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007035/0.2606, allocations: 365.8 kB / 0.8137 GB, free: 13.81 MB / 0.6387 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001333/0.2619, allocations: 0.6225 MB / 0.8143 GB, free: 13.14 MB / 0.6387 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.885e-06/0.2619, allocations: 0 / 0.8143 GB, free: 13.14 MB / 0.6387 GB Notification: Performance of matching and sorting (n=59) (initialization): time 0.002329/0.2643, allocations: 0.9389 MB / 0.8152 GB, free: 12.18 MB / 0.6387 GB Notification: Performance of prepare postOptimizeDAE: time 1.91e-05/0.2643, allocations: 4 kB / 0.8152 GB, free: 12.18 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.247e-06/0.2643, allocations: 4 kB / 0.8152 GB, free: 12.17 MB / 0.6387 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001061/0.2654, allocations: 273 kB / 0.8154 GB, free: 11.89 MB / 0.6387 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005868/0.266, allocations: 119.8 kB / 0.8156 GB, free: 11.77 MB / 0.6387 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006659/0.2727, allocations: 9.098 MB / 0.8244 GB, free: 1.84 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006528/0.2733, allocations: 44.02 kB / 0.8245 GB, free: 1.797 MB / 0.6387 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.501e-05/0.2734, allocations: 23.94 kB / 0.8245 GB, free: 1.773 MB / 0.6387 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0008577/0.2743, allocations: 433 kB / 0.8249 GB, free: 1.348 MB / 0.6387 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0006571/0.2749, allocations: 361.4 kB / 0.8253 GB, free: 0.9531 MB / 0.6387 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.00127/0.2762, allocations: 0.6129 MB / 0.8259 GB, free: 304 kB / 0.6387 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.864e-06/0.2762, allocations: 0 / 0.8259 GB, free: 304 kB / 0.6387 GB Notification: Performance of matching and sorting (n=59) (initialization_lambda0): time 0.002281/0.2785, allocations: 1.113 MB / 0.827 GB, free: 15.1 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 1.652e-05/0.2785, allocations: 15.92 kB / 0.827 GB, free: 15.08 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.928e-06/0.2785, allocations: 352 / 0.827 GB, free: 15.08 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0007655/0.2793, allocations: 224.9 kB / 0.8272 GB, free: 14.84 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005711/0.2799, allocations: 119.8 kB / 0.8273 GB, free: 14.73 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.005587/0.2855, allocations: 8.804 MB / 0.8359 GB, free: 5.086 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006295/0.2862, allocations: 39.95 kB / 0.8359 GB, free: 5.047 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.109e-05/0.2862, allocations: 23.98 kB / 0.836 GB, free: 5.023 MB / 0.6544 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 14 * 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 (47): * Single equations (assignments): 41 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 6 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 3 systems {(1,2,100.0%), (1,2,100.0%), (1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 3 systems {(1,2), (1,2), (1,2)} Notification: Performance of prepare postOptimizeDAE: time 0.0002086/0.2864, allocations: 220.8 kB / 0.8362 GB, free: 4.805 MB / 0.6544 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001047/0.2865, allocations: 63.25 kB / 0.8362 GB, free: 4.742 MB / 0.6544 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001752/0.2867, allocations: 82.38 kB / 0.8363 GB, free: 4.66 MB / 0.6544 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.26e-06/0.2867, allocations: 4 kB / 0.8363 GB, free: 4.656 MB / 0.6544 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.134e-05/0.2868, allocations: 7.766 kB / 0.8363 GB, free: 4.652 MB / 0.6544 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.573e-06/0.2868, allocations: 3.984 kB / 0.8363 GB, free: 4.648 MB / 0.6544 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0007668/0.2875, allocations: 0.6454 MB / 0.8369 GB, free: 3.953 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.204e-06/0.2875, allocations: 0 / 0.8369 GB, free: 3.953 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004731/0.288, allocations: 91.84 kB / 0.837 GB, free: 3.863 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0009052/0.2889, allocations: 256.9 kB / 0.8373 GB, free: 3.594 MB / 0.6544 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.439e-05/0.289, allocations: 11.94 kB / 0.8373 GB, free: 3.582 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.006097/0.2951, allocations: 9.062 MB / 0.8461 GB, free: 9.676 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.473e-06/0.2951, allocations: 0 / 0.8461 GB, free: 9.676 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002152/0.2973, allocations: 0.9209 MB / 0.847 GB, free: 8.719 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002651/0.2976, allocations: 184.2 kB / 0.8472 GB, free: 8.52 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.594e-05/0.2976, allocations: 8 kB / 0.8472 GB, free: 8.512 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004759/0.2981, allocations: 35.95 kB / 0.8473 GB, free: 8.477 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001189/0.2982, allocations: 43.94 kB / 0.8473 GB, free: 8.434 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.221e-05/0.2983, allocations: 12 kB / 0.8473 GB, free: 8.422 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.0004563/0.2987, allocations: 407 kB / 0.8477 GB, free: 8.027 MB / 0.67 GB Notification: Performance of sort global known variables: time 1.91e-07/0.2988, allocations: 4 kB / 0.8477 GB, free: 8.023 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.001047/0.2998, allocations: 300 kB / 0.848 GB, free: 7.73 MB / 0.67 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * 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 (31): * Single equations (assignments): 25 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 6 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 3 systems {(1,2,100.0%), (1,2,100.0%), (1,2,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 3 systems {(1,2), (1,2), (1,2)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002337/0.3022, allocations: 1.462 MB / 0.8494 GB, free: 6.223 MB / 0.67 GB Notification: Performance of simCode: created initialization part: time 0.003543/0.3057, allocations: 2.348 MB / 0.8517 GB, free: 3.719 MB / 0.67 GB Notification: Performance of simCode: created event and clocks part: time 3.827e-06/0.3057, allocations: 0 / 0.8517 GB, free: 3.719 MB / 0.67 GB Notification: Performance of simCode: created simulation system equations: time 0.001275/0.307, allocations: 1.015 MB / 0.8527 GB, free: 2.625 MB / 0.67 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001001/0.308, allocations: 230.6 kB / 0.8529 GB, free: 2.414 MB / 0.67 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01002/0.3181, allocations: 6.182 MB / 0.859 GB, free: 12.03 MB / 0.6856 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005742/0.3187, allocations: 0.9781 MB / 0.8599 GB, free: 11.02 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.0006042/0.3193, allocations: 149.4 kB / 0.8601 GB, free: 10.88 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003062/0.3196, allocations: 235.4 kB / 0.8603 GB, free: 10.64 MB / 0.6856 GB Notification: Performance of SimCode: time 7.52e-07/0.3196, allocations: 0 / 0.8603 GB, free: 10.64 MB / 0.6856 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.05226/0.3719, allocations: 19.59 MB / 0.8794 GB, free: 7.32 MB / 0.7012 GB Notification: Performance of buildModelFMU: Generate platform static: time 12.32/12.69, allocations: 11.92 kB / 0.8794 GB, free: 7.309 MB / 0.7012 GB (rm -f Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine.pipe ; mkfifo Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine.pipe ; head -c 1048576 < Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine.pipe >> ../files/Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine.sim & python3 -m fmpy simulate --output-file Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine_res.csv --start-time 0 --stop-time 1 --timeout 50 --relative-tolerance 1e-06 Buildings_8_Buildings_Electrical_DC_Lines_Examples_DCLine.fmu > Buildings_8_Buildings.Electrical.DC.Lines.Examples.DCLine.pipe 2>&1)