Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.conf.json loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/OpenIPSL 2.0.0-master/package.mo", uses=false) Using package OpenIPSL with version 2.0.0-beta.1 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/OpenIPSL 2.0.0-master/package.mo) Using package ModelicaServices with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Using package Modelica with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Running command: translateModel(OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test") translateModel(OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test") Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001359/0.001359, allocations: 177.6 kB / 15.43 MB, free: 6.207 MB / 13.93 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.499/1.499, allocations: 225.7 MB / 241.9 MB, free: 396 kB / 186.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008076/0.0008077, allocations: 98.36 kB / 293.1 MB, free: 12.89 MB / 234.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/OpenIPSL 2.0.0-master/package.mo): time 0.1723/0.1723, allocations: 43.17 MB / 387.4 MB, free: 15.48 MB / 330.7 MB Notification: Performance of FrontEnd - loaded program: time 0.0004525/0.0004526, allocations: 9.062 kB / 458.6 MB, free: 55.42 MB / 330.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1561/0.1566, allocations: 60.5 MB / 0.5069 GB, free: 10.85 MB / 346.7 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test): time 0.005297/0.162, allocations: 4.862 MB / 0.5117 GB, free: 5.965 MB / 346.7 MB Notification: Performance of NFInst.instExpressions: time 0.00387/0.1659, allocations: 2.252 MB / 0.5139 GB, free: 3.582 MB / 346.7 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0003842/0.1663, allocations: 15.94 kB / 0.5139 GB, free: 3.566 MB / 346.7 MB Notification: Performance of NFTyping.typeComponents: time 0.0005968/0.1669, allocations: 159.1 kB / 0.514 GB, free: 3.41 MB / 346.7 MB Notification: Performance of NFTyping.typeBindings: time 0.001541/0.1684, allocations: 0.8628 MB / 0.5149 GB, free: 2.473 MB / 346.7 MB Notification: Performance of NFTyping.typeClassSections: time 0.001345/0.1698, allocations: 0.7395 MB / 0.5156 GB, free: 1.695 MB / 346.7 MB Notification: Performance of NFFlatten.flatten: time 0.001196/0.171, allocations: 1.175 MB / 0.5167 GB, free: 0.5156 MB / 346.7 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0003892/0.1714, allocations: 243.5 kB / 0.517 GB, free: 272 kB / 346.7 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0005961/0.172, allocations: 454 kB / 0.5174 GB, free: 15.82 MB / 362.7 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0006527/0.1727, allocations: 0.5831 MB / 0.518 GB, free: 15.23 MB / 362.7 MB Notification: Performance of NFPackage.collectConstants: time 0.0001014/0.1728, allocations: 48 kB / 0.518 GB, free: 15.19 MB / 362.7 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0003794/0.1732, allocations: 159.9 kB / 0.5182 GB, free: 15.03 MB / 362.7 MB Notification: Performance of NFScalarize.scalarize: time 0.0002171/0.1734, allocations: 203 kB / 0.5184 GB, free: 14.83 MB / 362.7 MB Notification: Performance of NFVerifyModel.verify: time 0.0004965/0.1739, allocations: 494.6 kB / 0.5188 GB, free: 14.34 MB / 362.7 MB Notification: Performance of NFConvertDAE.convert: time 0.001213/0.1751, allocations: 1.249 MB / 0.5201 GB, free: 13.09 MB / 362.7 MB Notification: Performance of FrontEnd - DAE generated: time 6.823e-06/0.1751, allocations: 0 / 0.5201 GB, free: 13.09 MB / 362.7 MB Notification: Performance of FrontEnd: time 2.535e-06/0.1752, allocations: 0 / 0.5201 GB, free: 13.09 MB / 362.7 MB Notification: Performance of Transformations before backend: time 1.096e-05/0.1752, allocations: 0 / 0.5201 GB, free: 13.09 MB / 362.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 162 * Number of variables: 162 Notification: Performance of Generate backend data structure: time 0.007282/0.1825, allocations: 2.206 MB / 0.5222 GB, free: 10.83 MB / 362.7 MB Notification: Performance of prepare preOptimizeDAE: time 4.65e-05/0.1825, allocations: 8.031 kB / 0.5222 GB, free: 10.82 MB / 362.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004639/0.1872, allocations: 0.7488 MB / 0.523 GB, free: 10.07 MB / 362.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001388/0.1886, allocations: 0.7172 MB / 0.5237 GB, free: 9.312 MB / 362.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002561/0.1888, allocations: 221.7 kB / 0.5239 GB, free: 9.062 MB / 362.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001385/0.189, allocations: 64 kB / 0.5239 GB, free: 9 MB / 362.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00216/0.1912, allocations: 1.1 MB / 0.525 GB, free: 7.887 MB / 362.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.555e-05/0.1912, allocations: 0 / 0.525 GB, free: 7.887 MB / 362.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.607e-05/0.1913, allocations: 28 kB / 0.525 GB, free: 7.859 MB / 362.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.631e-05/0.1913, allocations: 16 kB / 0.525 GB, free: 7.844 MB / 362.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002176/0.1935, allocations: 1.075 MB / 0.5261 GB, free: 6.766 MB / 362.7 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.004835/0.1983, allocations: 2.617 MB / 0.5286 GB, free: 4.094 MB / 362.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.002622/0.201, allocations: 1.153 MB / 0.5298 GB, free: 2.93 MB / 362.7 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.00147/0.2025, allocations: 0.7938 MB / 0.5305 GB, free: 2.137 MB / 362.7 MB Notification: Performance of preOpt evalFunc (simulation): time 8.703e-05/0.2026, allocations: 12.59 kB / 0.5306 GB, free: 2.125 MB / 362.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.643e-05/0.2026, allocations: 43.22 kB / 0.5306 GB, free: 2.074 MB / 362.7 MB Notification: Performance of pre-optimization done (n=81): time 2.835e-06/0.2026, allocations: 0 / 0.5306 GB, free: 2.074 MB / 362.7 MB Notification: Performance of matching and sorting (n=81): time 0.2875/0.4901, allocations: 9.233 MB / 0.5396 GB, free: 31.59 MB / 362.7 MB Notification: Performance of inlineWhenForInitialization (initialization): time 4.804e-05/0.4902, allocations: 90.38 kB / 0.5397 GB, free: 31.49 MB / 362.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001419/0.4916, allocations: 0.7712 MB / 0.5405 GB, free: 31.37 MB / 362.7 MB Notification: Performance of collectPreVariables (initialization): time 0.0001809/0.4918, allocations: 39.55 kB / 0.5405 GB, free: 31.34 MB / 362.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.000311/0.4922, allocations: 392.3 kB / 0.5409 GB, free: 31.16 MB / 362.7 MB Notification: Performance of collectInitialBindings (initialization): time 0.0002981/0.4925, allocations: 291.5 kB / 0.5411 GB, free: 30.96 MB / 362.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 7.114e-05/0.4925, allocations: 16.12 kB / 0.5412 GB, free: 30.95 MB / 362.7 MB Notification: Performance of setup shared object (initialization): time 8.897e-05/0.4926, allocations: 350.1 kB / 0.5415 GB, free: 30.62 MB / 362.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001662/0.4943, allocations: 0.7422 MB / 0.5422 GB, free: 30.37 MB / 362.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001596/0.4959, allocations: 0.822 MB / 0.543 GB, free: 30.07 MB / 362.7 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.01788/0.5138, allocations: 5.021 MB / 0.5479 GB, free: 28.62 MB / 362.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.268e-06/0.5138, allocations: 1.281 kB / 0.5479 GB, free: 28.62 MB / 362.7 MB Notification: Performance of matching and sorting (n=127) (initialization): time 0.01399/0.5278, allocations: 5.152 MB / 0.553 GB, free: 26.45 MB / 362.7 MB Notification: Performance of prepare postOptimizeDAE: time 6.296e-05/0.5279, allocations: 97.62 kB / 0.5531 GB, free: 26.36 MB / 362.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.697e-06/0.5279, allocations: 0 / 0.5531 GB, free: 26.36 MB / 362.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.005896/0.5339, allocations: 2.208 MB / 0.5552 GB, free: 25.25 MB / 362.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000794/0.5347, allocations: 155.8 kB / 0.5554 GB, free: 25.09 MB / 362.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.019/0.5537, allocations: 10.22 MB / 0.5653 GB, free: 14.75 MB / 362.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001386/0.5551, allocations: 203 kB / 0.5655 GB, free: 14.55 MB / 362.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.304e-05/0.5552, allocations: 31.98 kB / 0.5656 GB, free: 14.52 MB / 362.7 MB Notification: Performance of prepare postOptimizeDAE: time 9.127e-06/0.5552, allocations: 7.062 kB / 0.5656 GB, free: 14.52 MB / 362.7 MB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01243/0.5676, allocations: 5.005 MB / 0.5705 GB, free: 9.504 MB / 362.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.065e-05/0.5677, allocations: 0 / 0.5705 GB, free: 9.504 MB / 362.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.005785/0.5735, allocations: 2.207 MB / 0.5726 GB, free: 7.293 MB / 362.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008205/0.5743, allocations: 151.8 kB / 0.5728 GB, free: 7.145 MB / 362.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.02001/0.5944, allocations: 10.2 MB / 0.5827 GB, free: 12.81 MB / 378.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00144/0.5958, allocations: 183.2 kB / 0.5829 GB, free: 12.63 MB / 378.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.338e-05/0.5959, allocations: 35.98 kB / 0.5829 GB, free: 12.6 MB / 378.7 MB Warning: Assuming fixed start value for the following 3 variables: gen.e1q:VARIABLE(start = gen.e1q0 unit = "1" fixed = true ) "q-axis transient voltage" type: Real gen.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real tGtypeII.transferFunction1.x_scaled[1]:VARIABLE(fixed = true protected = true ) "Scaled vector x" type: Real [1] Notification: Model statistics after passing the back-end for initialization: * 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 initialization (88): * Single equations (assignments): 87 * 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 {(25,15)} Notification: Performance of prepare postOptimizeDAE: time 0.0005588/0.5965, allocations: 305.9 kB / 0.5832 GB, free: 12.29 MB / 378.7 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001595/0.5967, allocations: 90.88 kB / 0.5833 GB, free: 12.2 MB / 378.7 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01409/0.6108, allocations: 4.949 MB / 0.5881 GB, free: 7.227 MB / 378.7 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.366e-05/0.6108, allocations: 8 kB / 0.5881 GB, free: 7.219 MB / 378.7 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.058e-06/0.6108, allocations: 4 kB / 0.5882 GB, free: 7.215 MB / 378.7 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.274e-05/0.6109, allocations: 11.91 kB / 0.5882 GB, free: 7.203 MB / 378.7 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001811/0.6127, allocations: 1.104 MB / 0.5892 GB, free: 6.066 MB / 378.7 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.418e-06/0.6127, allocations: 0 / 0.5892 GB, free: 6.066 MB / 378.7 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004468/0.6132, allocations: 73.34 kB / 0.5893 GB, free: 5.996 MB / 378.7 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.006382/0.6195, allocations: 2.171 MB / 0.5914 GB, free: 3.82 MB / 378.7 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001121/0.6197, allocations: 15.94 kB / 0.5914 GB, free: 3.805 MB / 378.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01952/0.6392, allocations: 8.813 MB / 0.6001 GB, free: 10.86 MB / 394.7 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.51e-06/0.6393, allocations: 8 kB / 0.6001 GB, free: 10.85 MB / 394.7 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01576/0.655, allocations: 5.898 MB / 0.6058 GB, free: 4.934 MB / 394.7 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0004594/0.6555, allocations: 183.8 kB / 0.606 GB, free: 4.734 MB / 394.7 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001506/0.6557, allocations: 23.92 kB / 0.606 GB, free: 4.711 MB / 394.7 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009989/0.6567, allocations: 147.8 kB / 0.6062 GB, free: 4.566 MB / 394.7 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0006904/0.6574, allocations: 180.7 kB / 0.6063 GB, free: 4.391 MB / 394.7 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.617e-05/0.6575, allocations: 20 kB / 0.6064 GB, free: 4.371 MB / 394.7 MB Notification: Performance of sorting global known variables: time 0.0008365/0.6583, allocations: 0.5341 MB / 0.6069 GB, free: 3.844 MB / 394.7 MB Notification: Performance of sort global known variables: time 1.4e-07/0.6583, allocations: 0 / 0.6069 GB, free: 3.844 MB / 394.7 MB Notification: Performance of remove unused functions: time 0.001727/0.6601, allocations: 0.6461 MB / 0.6075 GB, free: 3.199 MB / 394.7 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (gen.delta,gen.w,gen.e1q,tGtypeII.transferFunction1.x_scaled[1]) * 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 (44): * Single equations (assignments): 43 * 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 {(26,14)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0002548/0.6603, allocations: 123.7 kB / 0.6076 GB, free: 3.066 MB / 394.7 MB Notification: Performance of simCode: created initialization part: time 0.01159/0.6719, allocations: 4.533 MB / 0.612 GB, free: 14.52 MB / 410.7 MB Notification: Performance of simCode: created event and clocks part: time 4.518e-06/0.672, allocations: 0 / 0.612 GB, free: 14.52 MB / 410.7 MB Notification: Performance of simCode: created simulation system equations: time 0.004695/0.6767, allocations: 1.739 MB / 0.6137 GB, free: 12.76 MB / 410.7 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0008148/0.6775, allocations: 76.72 kB / 0.6138 GB, free: 12.68 MB / 410.7 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004248/0.6818, allocations: 2.287 MB / 0.6161 GB, free: 10.37 MB / 410.7 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006267/0.6824, allocations: 1.027 MB / 0.6171 GB, free: 9.312 MB / 410.7 MB Notification: Performance of simCode: alias equations: time 0.0003844/0.6828, allocations: 93.7 kB / 0.6171 GB, free: 9.219 MB / 410.7 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001856/0.683, allocations: 47.44 kB / 0.6172 GB, free: 9.172 MB / 410.7 MB Notification: Performance of SimCode: time 1.192e-06/0.683, allocations: 0 / 0.6172 GB, free: 9.172 MB / 410.7 MB Notification: Performance of Templates: time 0.04183/0.7248, allocations: 28.67 MB / 0.6452 GB, free: 12.51 MB / 442.7 MB make -j1 -f OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.makefile (rm -f OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.pipe ; mkfifo OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.pipe ; head -c 1048576 < OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.pipe >> ../files/OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.sim & ./OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test -abortSlowSimulation -alarm=480 -lv LOG_STATS > OpenIPSL_OpenIPSL.Examples.Controls.PSAT.TG.TGTypeII_test.pipe 2>&1)