Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.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 3.1.0-master/package.mo", uses=false) Using package OpenIPSL with version 3.1.0-dev (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/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.Tests.Controls.CGMES.ES.ExcSEXS,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS") translateModel(OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001257/0.001257, allocations: 111.3 kB / 15.23 MB, free: 0.6602 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.409/1.409, allocations: 222.9 MB / 238.8 MB, free: 4.801 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001412/0.001412, allocations: 184.4 kB / 289.1 MB, free: 2.543 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.1.0-master/package.mo): time 0.5752/0.5752, allocations: 91.89 MB / 431.2 MB, free: 9.531 MB / 302.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001513/0.001513, allocations: 75.88 kB / 0.5012 GB, free: 8.242 MB / 382.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4473/0.4488, allocations: 71.26 MB / 0.5708 GB, free: 36.34 MB / 430.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS): time 0.007855/0.4567, allocations: 8.619 MB / 0.5792 GB, free: 31.24 MB / 430.1 MB Notification: Performance of NFInst.instExpressions: time 0.006179/0.4629, allocations: 2.715 MB / 0.5819 GB, free: 29.34 MB / 430.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.00174/0.4647, allocations: 12.59 kB / 0.5819 GB, free: 29.34 MB / 430.1 MB Notification: Performance of NFTyping.typeComponents: time 0.00106/0.4658, allocations: 262.3 kB / 0.5821 GB, free: 29.23 MB / 430.1 MB Notification: Performance of NFTyping.typeBindings: time 0.002957/0.4688, allocations: 1.013 MB / 0.5831 GB, free: 28.59 MB / 430.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.001613/0.4704, allocations: 0.701 MB / 0.5838 GB, free: 28.21 MB / 430.1 MB Notification: Performance of NFFlatten.flatten: time 0.00233/0.4728, allocations: 2.166 MB / 0.5859 GB, free: 27.2 MB / 430.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0005195/0.4733, allocations: 367.8 kB / 0.5863 GB, free: 27.01 MB / 430.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.001143/0.4744, allocations: 0.8167 MB / 0.5871 GB, free: 26.65 MB / 430.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001098/0.4756, allocations: 1.085 MB / 0.5881 GB, free: 26.16 MB / 430.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002469/0.4758, allocations: 106.4 kB / 0.5882 GB, free: 26.16 MB / 430.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0008227/0.4766, allocations: 326.5 kB / 0.5885 GB, free: 26.1 MB / 430.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0003394/0.477, allocations: 397.9 kB / 0.5889 GB, free: 25.87 MB / 430.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0007019/0.4777, allocations: 0.8425 MB / 0.5897 GB, free: 25.33 MB / 430.1 MB Notification: Performance of NFConvertDAE.convert: time 0.001866/0.4796, allocations: 2.236 MB / 0.5919 GB, free: 24.37 MB / 430.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.248e-06/0.4796, allocations: 0 / 0.5919 GB, free: 24.37 MB / 430.1 MB Notification: Performance of FrontEnd: time 1.703e-06/0.4796, allocations: 1.188 kB / 0.5919 GB, free: 24.37 MB / 430.1 MB Notification: Performance of Transformations before backend: time 2.056e-05/0.4796, allocations: 0 / 0.5919 GB, free: 24.37 MB / 430.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 241 * Number of variables: 241 Notification: Performance of Generate backend data structure: time 0.01344/0.4931, allocations: 3.633 MB / 0.5955 GB, free: 22.87 MB / 430.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.481e-05/0.4931, allocations: 9.406 kB / 0.5955 GB, free: 22.87 MB / 430.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004923/0.4981, allocations: 0.7513 MB / 0.5962 GB, free: 22.7 MB / 430.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002816/0.5009, allocations: 1.176 MB / 0.5974 GB, free: 21.96 MB / 430.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004988/0.5014, allocations: 427 kB / 0.5978 GB, free: 21.57 MB / 430.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002583/0.5017, allocations: 114.6 kB / 0.5979 GB, free: 21.52 MB / 430.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00351/0.5052, allocations: 1.441 MB / 0.5993 GB, free: 20.97 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.254e-05/0.5052, allocations: 3.938 kB / 0.5993 GB, free: 20.97 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.00013/0.5054, allocations: 36.53 kB / 0.5993 GB, free: 20.94 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.952e-05/0.5054, allocations: 27.03 kB / 0.5994 GB, free: 20.94 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003337/0.5088, allocations: 1.373 MB / 0.6007 GB, free: 20.48 MB / 430.1 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 0.0106/0.5194, allocations: 4.98 MB / 0.6056 GB, free: 17.62 MB / 430.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.008849/0.5283, allocations: 2.969 MB / 0.6085 GB, free: 16.43 MB / 430.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.002047/0.5303, allocations: 0.9348 MB / 0.6094 GB, free: 16.05 MB / 430.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0001427/0.5305, allocations: 21 kB / 0.6094 GB, free: 16.05 MB / 430.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002274/0.5328, allocations: 1.075 MB / 0.6104 GB, free: 15.65 MB / 430.1 MB Notification: Performance of pre-optimization done (n=126): time 4.468e-06/0.5328, allocations: 0 / 0.6104 GB, free: 15.65 MB / 430.1 MB Notification: Performance of matching and sorting (n=126): time 0.04012/0.5729, allocations: 9.451 MB / 0.6197 GB, free: 12.14 MB / 430.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.952e-05/0.573, allocations: 141.9 kB / 0.6198 GB, free: 11.98 MB / 430.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00262/0.5757, allocations: 1.492 MB / 0.6213 GB, free: 10.66 MB / 430.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0004751/0.5761, allocations: 49.7 kB / 0.6213 GB, free: 10.61 MB / 430.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0003775/0.5765, allocations: 0.6122 MB / 0.6219 GB, free: 9.988 MB / 430.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0004667/0.577, allocations: 453.5 kB / 0.6223 GB, free: 9.539 MB / 430.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0005777/0.5776, allocations: 335.4 kB / 0.6227 GB, free: 9.207 MB / 430.1 MB Notification: Performance of setup shared object (initialization): time 4.612e-05/0.5776, allocations: 305.1 kB / 0.623 GB, free: 8.906 MB / 430.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001909/0.5796, allocations: 0.9925 MB / 0.6239 GB, free: 7.91 MB / 430.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001943/0.5815, allocations: 1.183 MB / 0.6251 GB, free: 6.676 MB / 430.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.00365/0.5852, allocations: 2.109 MB / 0.6271 GB, free: 4.527 MB / 430.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.214e-06/0.5852, allocations: 0 / 0.6271 GB, free: 4.527 MB / 430.1 MB Notification: Performance of matching and sorting (n=232) (initialization): time 0.01121/0.5964, allocations: 4.373 MB / 0.6314 GB, free: 140 kB / 430.1 MB Notification: Performance of prepare postOptimizeDAE: time 2.631e-05/0.5964, allocations: 11.94 kB / 0.6314 GB, free: 128 kB / 430.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.433e-05/0.5965, allocations: 0 / 0.6314 GB, free: 128 kB / 430.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.009349/0.6058, allocations: 2.644 MB / 0.634 GB, free: 13.48 MB / 446.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001968/0.6078, allocations: 319.5 kB / 0.6343 GB, free: 13.16 MB / 446.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006575/0.6144, allocations: 2.699 MB / 0.6369 GB, free: 10.44 MB / 446.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002949/0.6174, allocations: 262.3 kB / 0.6372 GB, free: 10.18 MB / 446.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002884/0.6177, allocations: 63.98 kB / 0.6372 GB, free: 10.12 MB / 446.1 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002961/0.6206, allocations: 1.203 MB / 0.6384 GB, free: 8.914 MB / 446.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002474/0.6231, allocations: 1.175 MB / 0.6396 GB, free: 7.688 MB / 446.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.00466/0.6278, allocations: 2.093 MB / 0.6416 GB, free: 5.555 MB / 446.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.052e-05/0.6278, allocations: 4 kB / 0.6416 GB, free: 5.551 MB / 446.1 MB Notification: Performance of matching and sorting (n=232) (initialization_lambda0): time 0.01329/0.6411, allocations: 4.346 MB / 0.6459 GB, free: 1.188 MB / 446.1 MB Notification: Performance of prepare postOptimizeDAE: time 2.31e-05/0.6412, allocations: 8 kB / 0.6459 GB, free: 1.18 MB / 446.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.218e-05/0.6412, allocations: 4 kB / 0.6459 GB, free: 1.176 MB / 446.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.009343/0.6505, allocations: 2.648 MB / 0.6485 GB, free: 14.53 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001813/0.6524, allocations: 307.6 kB / 0.6488 GB, free: 14.23 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006576/0.659, allocations: 2.687 MB / 0.6514 GB, free: 11.51 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003162/0.6622, allocations: 250.6 kB / 0.6516 GB, free: 11.26 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003861/0.6626, allocations: 59.98 kB / 0.6517 GB, free: 11.2 MB / 462.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * 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 (177): * Single equations (assignments): 176 * 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 {(30,26)} Notification: Performance of prepare postOptimizeDAE: time 0.0006523/0.6632, allocations: 265.3 kB / 0.6519 GB, free: 10.94 MB / 462.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0007451/0.664, allocations: 165.9 kB / 0.6521 GB, free: 10.77 MB / 462.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01644/0.6804, allocations: 4.819 MB / 0.6568 GB, free: 5.93 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.931e-05/0.6805, allocations: 12 kB / 0.6568 GB, free: 5.918 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.231e-05/0.6805, allocations: 8 kB / 0.6568 GB, free: 5.91 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.425e-05/0.6805, allocations: 7.969 kB / 0.6568 GB, free: 5.902 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 postOpt removeSimpleEquations (simulation): time 0.02149/0.702, allocations: 6.977 MB / 0.6636 GB, free: 14.79 MB / 478.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.714e-05/0.7021, allocations: 7.969 kB / 0.6636 GB, free: 14.78 MB / 478.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0011/0.7032, allocations: 147.8 kB / 0.6638 GB, free: 14.64 MB / 478.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0078/0.711, allocations: 2.138 MB / 0.6659 GB, free: 12.49 MB / 478.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003763/0.7115, allocations: 31.98 kB / 0.6659 GB, free: 12.46 MB / 478.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.02546/0.7369, allocations: 9.186 MB / 0.6749 GB, free: 3.133 MB / 478.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.016e-06/0.737, allocations: 4 kB / 0.6749 GB, free: 3.129 MB / 478.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0195/0.7565, allocations: 6.001 MB / 0.6807 GB, free: 13.09 MB / 494.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0009866/0.7575, allocations: 278.7 kB / 0.681 GB, free: 12.8 MB / 494.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0007293/0.7582, allocations: 31.88 kB / 0.681 GB, free: 12.77 MB / 494.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002229/0.7605, allocations: 159.8 kB / 0.6812 GB, free: 12.61 MB / 494.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001009/0.7615, allocations: 245.3 kB / 0.6814 GB, free: 12.38 MB / 494.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001685/0.7617, allocations: 36 kB / 0.6814 GB, free: 12.34 MB / 494.1 MB Notification: Performance of sorting global known variables: time 0.002307/0.764, allocations: 1.018 MB / 0.6824 GB, free: 11.32 MB / 494.1 MB Notification: Performance of sort global known variables: time 2.1e-07/0.764, allocations: 0 / 0.6824 GB, free: 11.32 MB / 494.1 MB Notification: Performance of remove unused functions: time 0.003517/0.7675, allocations: 0.8466 MB / 0.6833 GB, free: 10.48 MB / 494.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 12 (gENCLS.omega,gENCLS.delta,gENCLS.eq,gENROE.w,gENROE.delta,gENROE.Epd,gENROE.Epq,gENROE.PSIkd,gENROE.PSIkq,sEXS.simpleLagLim.state,sEXS.leadLag.TF.x_scaled[1],sEXS.transferFunction.x_scaled[1]) * 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 (83): * Single equations (assignments): 82 * 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 {(26,23)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0004671/0.768, allocations: 156 kB / 0.6834 GB, free: 10.32 MB / 494.1 MB Notification: Performance of simCode: created initialization part: time 0.01623/0.7843, allocations: 4.824 MB / 0.6881 GB, free: 5.492 MB / 494.1 MB Notification: Performance of simCode: created event and clocks part: time 9.187e-06/0.7843, allocations: 0 / 0.6881 GB, free: 5.492 MB / 494.1 MB Notification: Performance of simCode: created simulation system equations: time 0.006727/0.7911, allocations: 1.906 MB / 0.69 GB, free: 3.57 MB / 494.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002352/0.7934, allocations: 152.3 kB / 0.6901 GB, free: 3.422 MB / 494.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007694/0.8012, allocations: 3.683 MB / 0.6937 GB, free: 15.71 MB / 0.4981 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001187/0.8024, allocations: 1.245 MB / 0.6949 GB, free: 14.43 MB / 0.4981 GB Notification: Performance of simCode: alias equations: time 0.001279/0.8037, allocations: 186.1 kB / 0.6951 GB, free: 14.25 MB / 0.4981 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005567/0.8042, allocations: 95.41 kB / 0.6952 GB, free: 14.15 MB / 0.4981 GB Notification: Performance of SimCode: time 1.283e-06/0.8043, allocations: 0 / 0.6952 GB, free: 14.15 MB / 0.4981 GB Notification: Performance of Templates: time 0.05899/0.8632, allocations: 32.94 MB / 0.7274 GB, free: 13.23 MB / 0.5294 GB make -j1 -f OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.makefile (rm -f OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.pipe ; mkfifo OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.pipe ; head -c 1048576 < OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.pipe >> ../files/OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.sim & ./OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS -abortSlowSimulation -alarm=480 -lv LOG_STATS > OpenIPSL_dev_OpenIPSL.Tests.Controls.CGMES.ES.ExcSEXS.pipe 2>&1)