Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.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/Modelica 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/OpenIPSL 3.0.1/package.mo", uses=false) Using package OpenIPSL with version 3.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/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 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 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(OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI") translateModel(OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001346/0.001346, allocations: 116.4 kB / 16.42 MB, free: 6.48 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.306/1.306, allocations: 222.9 MB / 240.1 MB, free: 4.555 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001356/0.001356, allocations: 180.5 kB / 290.4 MB, free: 2.266 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/package.mo): time 0.433/0.433, allocations: 78.53 MB / 419.1 MB, free: 3.145 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001516/0.001516, allocations: 84.42 kB / 0.5544 GB, free: 0.8672 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2586/0.2601, allocations: 68.17 MB / 0.621 GB, free: 9.723 MB / 430.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI): time 0.01649/0.2766, allocations: 21.73 MB / 0.6422 GB, free: 4.406 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.01081/0.2875, allocations: 4.884 MB / 0.647 GB, free: 15.5 MB / 462.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002614/0.2901, allocations: 44 kB / 0.647 GB, free: 15.46 MB / 462.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001974/0.2921, allocations: 0.8906 MB / 0.6479 GB, free: 14.56 MB / 462.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr16.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr67.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr78.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr89.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr49.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr528.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr2829.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr2930.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr3031.m <> 1.0, <> on Real numbers is only allowed inside functions. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation Tr231.m <> 1.0, <> on Real numbers is only allowed inside functions. Notification: Performance of NFTyping.typeBindings: time 0.005961/0.2981, allocations: 2.279 MB / 0.6501 GB, free: 12.27 MB / 462.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.004836/0.303, allocations: 2.098 MB / 0.6522 GB, free: 10.21 MB / 462.1 MB Notification: Performance of NFFlatten.flatten: time 0.007262/0.3102, allocations: 5.724 MB / 0.6578 GB, free: 4.457 MB / 462.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001763/0.312, allocations: 1.314 MB / 0.6591 GB, free: 3.094 MB / 462.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002831/0.3148, allocations: 2.314 MB / 0.6613 GB, free: 0.7695 MB / 462.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.003276/0.3181, allocations: 2.955 MB / 0.6642 GB, free: 13.8 MB / 478.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0008747/0.319, allocations: 440 kB / 0.6646 GB, free: 13.37 MB / 478.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.001176/0.3202, allocations: 0.5857 MB / 0.6652 GB, free: 12.79 MB / 478.1 MB Notification: Performance of NFScalarize.scalarize: time 0.000987/0.3212, allocations: 1.159 MB / 0.6663 GB, free: 11.62 MB / 478.1 MB Notification: Performance of NFVerifyModel.verify: time 0.002493/0.3237, allocations: 2.614 MB / 0.6689 GB, free: 8.992 MB / 478.1 MB Notification: Performance of NFConvertDAE.convert: time 0.006264/0.33, allocations: 6.267 MB / 0.675 GB, free: 2.703 MB / 478.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.489e-06/0.33, allocations: 0 / 0.675 GB, free: 2.703 MB / 478.1 MB Notification: Performance of FrontEnd: time 1.212e-06/0.33, allocations: 0 / 0.675 GB, free: 2.703 MB / 478.1 MB Notification: Performance of Transformations before backend: time 0.0001002/0.3301, allocations: 0 / 0.675 GB, free: 2.703 MB / 478.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 891 * Number of variables: 891 Notification: Performance of Generate backend data structure: time 0.02871/0.3588, allocations: 9.329 MB / 0.6841 GB, free: 9.273 MB / 494.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.184e-05/0.3589, allocations: 12.03 kB / 0.6841 GB, free: 9.262 MB / 494.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.02685/0.3858, allocations: 4.031 MB / 0.6881 GB, free: 5.223 MB / 494.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005189/0.391, allocations: 2.709 MB / 0.6907 GB, free: 2.438 MB / 494.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0009177/0.3919, allocations: 0.9283 MB / 0.6916 GB, free: 1.379 MB / 494.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0009817/0.3929, allocations: 348 kB / 0.6919 GB, free: 1.039 MB / 494.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01013/0.403, allocations: 4.747 MB / 0.6966 GB, free: 12.25 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 7.263e-05/0.4031, allocations: 3.938 kB / 0.6966 GB, free: 12.25 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0004412/0.4036, allocations: 140 kB / 0.6967 GB, free: 12.11 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.99e-05/0.4037, allocations: 84 kB / 0.6968 GB, free: 12.03 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.008965/0.4126, allocations: 4.263 MB / 0.701 GB, free: 7.762 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 preOpt removeSimpleEquations (simulation): time 0.0319/0.4445, allocations: 18.34 MB / 0.7189 GB, free: 4.234 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01197/0.4565, allocations: 4.983 MB / 0.7237 GB, free: 15.16 MB / 0.5294 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.005701/0.4623, allocations: 2.794 MB / 0.7265 GB, free: 12.36 MB / 0.5294 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005404/0.4628, allocations: 74.89 kB / 0.7265 GB, free: 12.29 MB / 0.5294 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 5.941e-05/0.4629, allocations: 73.48 kB / 0.7266 GB, free: 12.2 MB / 0.5294 GB Notification: Performance of pre-optimization done (n=381): time 6.733e-06/0.4629, allocations: 0 / 0.7266 GB, free: 12.2 MB / 0.5294 GB Notification: Performance of matching and sorting (n=381): time 0.5254/0.9883, allocations: 66.31 MB / 0.7913 GB, free: 123.8 MB / 0.5606 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.599e-05/0.9884, allocations: 166.2 kB / 0.7915 GB, free: 123.7 MB / 0.5606 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003791/0.9922, allocations: 3.248 MB / 0.7947 GB, free: 122 MB / 0.5606 GB Notification: Performance of collectPreVariables (initialization): time 0.0005836/0.9928, allocations: 88.77 kB / 0.7948 GB, free: 121.9 MB / 0.5606 GB Notification: Performance of collectInitialEqns (initialization): time 0.0009567/0.9938, allocations: 2.005 MB / 0.7967 GB, free: 120.5 MB / 0.5606 GB Notification: Performance of collectInitialBindings (initialization): time 0.001247/0.995, allocations: 1.374 MB / 0.7981 GB, free: 119.5 MB / 0.5606 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001471/0.9965, allocations: 0.669 MB / 0.7987 GB, free: 119.1 MB / 0.5606 GB Notification: Performance of setup shared object (initialization): time 3.403e-05/0.9965, allocations: 301.1 kB / 0.799 GB, free: 118.8 MB / 0.5606 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.004806/1.001, allocations: 2.618 MB / 0.8016 GB, free: 117.5 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.004994/1.006, allocations: 3.226 MB / 0.8047 GB, free: 114.5 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.06362/1.07, allocations: 18.97 MB / 0.8232 GB, free: 95.25 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.751e-05/1.07, allocations: 4 kB / 0.8232 GB, free: 95.25 MB / 0.5606 GB Notification: Performance of matching and sorting (n=532) (initialization): time 0.04995/1.12, allocations: 17.29 MB / 0.8401 GB, free: 77.91 MB / 0.5606 GB Notification: Performance of prepare postOptimizeDAE: time 5.491e-05/1.12, allocations: 63.41 kB / 0.8402 GB, free: 77.83 MB / 0.5606 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.559e-05/1.12, allocations: 15.47 kB / 0.8402 GB, free: 77.82 MB / 0.5606 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.02307/1.143, allocations: 7.149 MB / 0.8472 GB, free: 70.66 MB / 0.5606 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003259/1.146, allocations: 0.6718 MB / 0.8478 GB, free: 69.99 MB / 0.5606 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.07508/1.222, allocations: 33.32 MB / 0.8804 GB, free: 36.52 MB / 0.5606 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.005108/1.227, allocations: 0.6049 MB / 0.881 GB, free: 35.99 MB / 0.5606 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0004199/1.227, allocations: 152 kB / 0.8811 GB, free: 35.84 MB / 0.5606 GB Warning: Assuming fixed start value for the following 5 variables: order5.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real order3.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real order3.delta:VARIABLE(flow=false start = order3.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real order3.e1q:VARIABLE(start = order3.e1q0 unit = "1" fixed = true ) "q-axis transient voltage" type: Real order5.delta:VARIABLE(flow=false start = order5.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.005887/1.233, allocations: 3.076 MB / 0.8841 GB, free: 32.77 MB / 0.5606 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.005011/1.238, allocations: 3.213 MB / 0.8873 GB, free: 29.32 MB / 0.5606 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.06375/1.302, allocations: 18.94 MB / 0.9058 GB, free: 10.12 MB / 0.5606 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.634e-05/1.302, allocations: 4 kB / 0.9058 GB, free: 10.11 MB / 0.5606 GB Notification: Performance of matching and sorting (n=532) (initialization_lambda0): time 0.0523/1.354, allocations: 17.26 MB / 0.9226 GB, free: 8.809 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 6.263e-05/1.354, allocations: 75.33 kB / 0.9227 GB, free: 8.723 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.643e-05/1.354, allocations: 12 kB / 0.9227 GB, free: 8.711 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.02527/1.38, allocations: 7.154 MB / 0.9297 GB, free: 1.547 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003478/1.383, allocations: 0.6631 MB / 0.9303 GB, free: 0.8828 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.08415/1.467, allocations: 33.33 MB / 0.9629 GB, free: 15.42 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.005175/1.472, allocations: 0.5677 MB / 0.9634 GB, free: 14.92 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0006602/1.473, allocations: 155.9 kB / 0.9636 GB, free: 14.77 MB / 0.6231 GB Warning: Assuming fixed start value for the following 5 variables: order5.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real order3.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real order3.delta:VARIABLE(flow=false start = order3.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real order3.e1q:VARIABLE(start = order3.e1q0 unit = "1" fixed = true ) "q-axis transient voltage" type: Real order5.delta:VARIABLE(flow=false start = order5.delta0 unit = "rad" fixed = true ) "Rotor angle" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 65 * 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 (397): * Single equations (assignments): 394 * 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 {(92,44,5.8%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0009585/1.474, allocations: 424.7 kB / 0.964 GB, free: 14.35 MB / 0.6231 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0009816/1.475, allocations: 484.9 kB / 0.9645 GB, free: 13.88 MB / 0.6231 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.05346/1.529, allocations: 16.75 MB / 0.9808 GB, free: 13.06 MB / 0.6387 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.19e-05/1.529, allocations: 19.92 kB / 0.9808 GB, free: 13.04 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.065e-06/1.529, allocations: 0 / 0.9808 GB, free: 13.04 MB / 0.6387 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001192/1.53, allocations: 0.5895 MB / 0.9814 GB, free: 12.48 MB / 0.6387 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001092/1.531, allocations: 64 kB / 0.9815 GB, free: 12.42 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.004294/1.535, allocations: 355.6 kB / 0.9818 GB, free: 12.07 MB / 0.6387 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.006559/1.542, allocations: 1.891 MB / 0.9837 GB, free: 10.18 MB / 0.6387 GB Notification: Performance of postOpt createDAEmodeBDAE (simulation): time 0.02422/1.566, allocations: 8.194 MB / 0.9917 GB, free: 2.023 MB / 0.6387 GB Notification: Performance of postOpt symbolicJacobianDAE (simulation): time 0.01726/1.583, allocations: 8.258 MB / 0.9997 GB, free: 9.691 MB / 0.6544 GB Notification: Performance of postOpt setEvaluationStage (simulation): time 0.005286/1.589, allocations: 2.288 MB / 1.002 GB, free: 7.395 MB / 0.6544 GB Notification: Performance of sorting global known variables: time 0.003208/1.592, allocations: 2.129 MB / 1.004 GB, free: 5.262 MB / 0.6544 GB Notification: Performance of Backend: time 1.753e-06/1.592, allocations: 0 / 1.004 GB, free: 5.262 MB / 0.6544 GB Notification: Performance of simCode: created initialization part: time 0.04009/1.632, allocations: 13.42 MB / 1.017 GB, free: 7.789 MB / 0.67 GB Notification: Performance of SimCode: time 0.2391/1.871, allocations: 9.235 MB / 1.026 GB, free: 226.1 MB / 0.67 GB Notification: Performance of Templates: time 0.141/2.012, allocations: 124.2 MB / 1.147 GB, free: 127.5 MB / 0.67 GB make -j1 -f OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.makefile (rm -f OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.pipe ; mkfifo OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.pipe ; head -c 1048576 < OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.pipe >> ../files/OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.sim & ./OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI -abortSlowSimulation -alarm=480 -lv LOG_STATS > OpenIPSL_OpenIPSL.Examples.PSATSystems.TwoArea.FifthOrder_AVRI.pipe 2>&1)