Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.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 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo", uses=false) Using package AES with version (/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/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 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(AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary,fileNamePrefix="AES_AES_Coursework_ElecSys_case_studies_Primary_secondary_tertiary",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary,fileNamePrefix="AES_AES_Coursework_ElecSys_case_studies_Primary_secondary_tertiary",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 0.006222/0.006222, allocations: 96.7 kB / 15.73 MB, free: 6.051 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001314/0.001314, allocations: 197.9 kB / 16.67 MB, free: 5.973 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.344/1.344, allocations: 222.9 MB / 240.4 MB, free: 4.32 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo): time 0.203/0.203, allocations: 22.36 MB / 312.9 MB, free: 12.43 MB / 254.1 MB Notification: Performance of FrontEnd - loaded program: time 0.002871/0.002871, allocations: 64.64 kB / 436.6 MB, free: 34 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.09641/0.0993, allocations: 54.97 MB / 491.5 MB, free: 1.734 MB / 350.1 MB Notification: Performance of NFInst.instantiate(AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary): time 0.003333/0.1027, allocations: 2.528 MB / 494.1 MB, free: 15.19 MB / 366.1 MB Notification: Performance of NFInst.instExpressions: time 0.001534/0.1042, allocations: 0.772 MB / 494.8 MB, free: 14.42 MB / 366.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001568/0.1044, allocations: 4 kB / 494.8 MB, free: 14.41 MB / 366.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0003988/0.1048, allocations: 99.22 kB / 494.9 MB, free: 14.32 MB / 366.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0003062/0.1052, allocations: 135.1 kB / 495.1 MB, free: 14.18 MB / 366.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0003724/0.1055, allocations: 195.7 kB / 495.3 MB, free: 13.99 MB / 366.1 MB Notification: Performance of NFFlatten.flatten: time 0.0005796/0.1061, allocations: 0.5226 MB / 495.8 MB, free: 13.47 MB / 366.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0002287/0.1064, allocations: 120.7 kB / 495.9 MB, free: 13.35 MB / 366.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0002837/0.1067, allocations: 219.2 kB / 496.1 MB, free: 13.13 MB / 366.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0003182/0.107, allocations: 238.9 kB / 496.4 MB, free: 12.9 MB / 366.1 MB Notification: Performance of NFPackage.collectConstants: time 6.693e-05/0.1071, allocations: 40 kB / 496.4 MB, free: 12.86 MB / 366.1 MB Notification: Performance of NFFlatten.collectFunctions: time 6.832e-05/0.1071, allocations: 32 kB / 496.4 MB, free: 12.83 MB / 366.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001329/0.1073, allocations: 115.5 kB / 496.5 MB, free: 12.71 MB / 366.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0001867/0.1075, allocations: 178.9 kB / 496.7 MB, free: 12.54 MB / 366.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0004328/0.1079, allocations: 410.1 kB / 497.1 MB, free: 12.14 MB / 366.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.587e-06/0.1079, allocations: 0 / 497.1 MB, free: 12.14 MB / 366.1 MB Notification: Performance of FrontEnd: time 1.512e-06/0.1079, allocations: 0 / 497.1 MB, free: 12.14 MB / 366.1 MB Notification: Performance of Transformations before backend: time 6.993e-06/0.1079, allocations: 0 / 497.1 MB, free: 12.14 MB / 366.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 71 * Number of variables: 71 Notification: Performance of Generate backend data structure: time 0.001876/0.1098, allocations: 0.845 MB / 498 MB, free: 11.24 MB / 366.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.72e-05/0.1099, allocations: 8.031 kB / 498 MB, free: 11.23 MB / 366.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 7.221e-05/0.1099, allocations: 66.72 kB / 498 MB, free: 11.16 MB / 366.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 8.079e-05/0.11, allocations: 56.61 kB / 498.1 MB, free: 11.1 MB / 366.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008694/0.1109, allocations: 432 kB / 498.5 MB, free: 10.64 MB / 366.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.909e-05/0.1109, allocations: 24.59 kB / 498.5 MB, free: 10.62 MB / 366.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 5.198e-05/0.111, allocations: 35.94 kB / 498.6 MB, free: 10.58 MB / 366.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004803/0.1115, allocations: 301.7 kB / 498.9 MB, free: 10.27 MB / 366.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.132e-05/0.1115, allocations: 4 kB / 498.9 MB, free: 10.27 MB / 366.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.832e-05/0.1115, allocations: 16 kB / 498.9 MB, free: 10.25 MB / 366.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.045e-05/0.1116, allocations: 8 kB / 498.9 MB, free: 10.25 MB / 366.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003989/0.112, allocations: 210.1 kB / 499.1 MB, free: 10.04 MB / 366.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001566/0.1135, allocations: 1.034 MB / 0.4884 GB, free: 8.941 MB / 366.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0007753/0.1143, allocations: 383.4 kB / 0.4888 GB, free: 8.559 MB / 366.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002485/0.1146, allocations: 164.7 kB / 0.4889 GB, free: 8.395 MB / 366.1 MB Notification: Performance of preOpt evalFunc (simulation): time 2.034e-05/0.1146, allocations: 0 / 0.4889 GB, free: 8.395 MB / 366.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.453e-05/0.1146, allocations: 34.56 kB / 0.489 GB, free: 8.352 MB / 366.1 MB Notification: Performance of pre-optimization done (n=37): time 1.152e-06/0.1146, allocations: 4 kB / 0.489 GB, free: 8.348 MB / 366.1 MB Notification: Performance of matching and sorting (n=39): time 0.002016/0.1167, allocations: 1.112 MB / 0.49 GB, free: 7.164 MB / 366.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 4.582e-05/0.1167, allocations: 55.41 kB / 0.4901 GB, free: 7.098 MB / 366.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007703/0.1175, allocations: 429.6 kB / 0.4905 GB, free: 6.668 MB / 366.1 MB Notification: Performance of collectPreVariables (initialization): time 3.545e-05/0.1175, allocations: 33.7 kB / 0.4905 GB, free: 6.629 MB / 366.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0001531/0.1177, allocations: 208.6 kB / 0.4907 GB, free: 6.418 MB / 366.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001262/0.1178, allocations: 142.8 kB / 0.4909 GB, free: 6.277 MB / 366.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001065/0.1179, allocations: 78.08 kB / 0.491 GB, free: 6.195 MB / 366.1 MB Notification: Performance of setup shared object (initialization): time 0.0001742/0.1181, allocations: 350.8 kB / 0.4913 GB, free: 5.844 MB / 366.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001956/0.1183, allocations: 108.8 kB / 0.4914 GB, free: 5.738 MB / 366.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002444/0.1186, allocations: 169.8 kB / 0.4916 GB, free: 5.547 MB / 366.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001573/0.1202, allocations: 0.6141 MB / 0.4922 GB, free: 4.918 MB / 366.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.423e-06/0.1202, allocations: 0 / 0.4922 GB, free: 4.918 MB / 366.1 MB Warning: The linear system: 1 : Ge2.Pm = Ge2.Pcmd 2 : Ge2.Pm = Ge2.Pcmd [ 1.0 , -1.0 ; 1.0 , -1.0 ] * [ Ge2.Pm ; Ge2.Pcmd ] = [ 0.0 ; 0.0 ] might be structurally or numerically singular for variable Ge2.Pcmd since U(2,2) = 0.0. It might be hard to solve. Compilation continues anyway. Warning: The linear system: 1 : Ge1.Pm = Ge1.Pcmd 2 : Ge1.Pm = Ge1.Pcmd [ -1.0 , 1.0 ; -1.0 , 1.0 ] * [ Ge1.Pcmd ; Ge1.Pm ] = [ 0.0 ; 0.0 ] might be structurally or numerically singular for variable Ge1.Pm since U(2,2) = 0.0. It might be hard to solve. Compilation continues anyway. Notification: Performance of matching and sorting (n=52) (initialization): time 0.001112/0.1213, allocations: 0.7996 MB / 0.4929 GB, free: 4.023 MB / 366.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.469e-05/0.1213, allocations: 11.94 kB / 0.4929 GB, free: 4.012 MB / 366.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.079e-06/0.1213, allocations: 0 / 0.4929 GB, free: 4.012 MB / 366.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002774/0.1216, allocations: 106.6 kB / 0.493 GB, free: 3.898 MB / 366.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003524/0.122, allocations: 79.89 kB / 0.4931 GB, free: 3.82 MB / 366.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.005117/0.1271, allocations: 7.948 MB / 0.5009 GB, free: 11.34 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003652/0.1275, allocations: 40.02 kB / 0.5009 GB, free: 11.3 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.587e-05/0.1275, allocations: 12 kB / 0.5009 GB, free: 11.29 MB / 382.1 MB Warning: Assuming fixed start value for the following 1 variables: Ge2.deltag:VARIABLE(unit = "rad" fixed = true ) "generator angle wrt port" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 1 (Cs.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (42): * Single equations (assignments): 39 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(1,1,100.0%), (1,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,8)} Notification: Performance of prepare postOptimizeDAE: time 0.0001967/0.1277, allocations: 161.7 kB / 0.5011 GB, free: 11.12 MB / 382.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 7.281e-05/0.1278, allocations: 39.77 kB / 0.5011 GB, free: 11.08 MB / 382.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 9.665e-05/0.1279, allocations: 56.05 kB / 0.5012 GB, free: 11.02 MB / 382.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.319e-05/0.1279, allocations: 8 kB / 0.5012 GB, free: 11.01 MB / 382.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.645e-06/0.1279, allocations: 3.938 kB / 0.5012 GB, free: 11.01 MB / 382.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.091e-06/0.1279, allocations: 4 kB / 0.5012 GB, free: 11 MB / 382.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001247/0.1292, allocations: 0.8824 MB / 0.5021 GB, free: 10.06 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.515e-06/0.1292, allocations: 0 / 0.5021 GB, free: 10.06 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002923/0.1295, allocations: 63.84 kB / 0.5021 GB, free: 10 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002263/0.1297, allocations: 72.8 kB / 0.5022 GB, free: 9.926 MB / 382.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.882e-05/0.1298, allocations: 15.98 kB / 0.5022 GB, free: 9.91 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001746/0.1315, allocations: 1.896 MB / 0.5041 GB, free: 7.879 MB / 382.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.176e-06/0.1316, allocations: 4.031 kB / 0.5041 GB, free: 7.875 MB / 382.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0009094/0.1325, allocations: 0.6197 MB / 0.5047 GB, free: 7.238 MB / 382.1 MB Notification: Performance of postOpt removeConstants (simulation): time 9.531e-05/0.1326, allocations: 112.9 kB / 0.5048 GB, free: 7.109 MB / 382.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 4.805e-05/0.1326, allocations: 12 kB / 0.5048 GB, free: 7.098 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003675/0.133, allocations: 40.02 kB / 0.5048 GB, free: 7.059 MB / 382.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 7.028e-05/0.1331, allocations: 23.91 kB / 0.5048 GB, free: 7.035 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.25e-05/0.1331, allocations: 15.98 kB / 0.5049 GB, free: 7.02 MB / 382.1 MB Notification: Performance of sorting global known variables: time 0.0006478/0.1338, allocations: 327.1 kB / 0.5052 GB, free: 6.703 MB / 382.1 MB Notification: Performance of sort global known variables: time 1.8e-07/0.1338, allocations: 0 / 0.5052 GB, free: 6.703 MB / 382.1 MB Notification: Performance of remove unused functions: time 0.0004932/0.1343, allocations: 80 kB / 0.5052 GB, free: 6.625 MB / 382.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 8 (g1.x_scaled[1],g2.x_scaled[1],Cs.y,Ge1.deltag,Ge1.wg,Ge2.thetap,Ge2.deltag,Ge2.wg) * 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): 30 * 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 {(1,8)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001247/0.1355, allocations: 1.172 MB / 0.5064 GB, free: 5.418 MB / 382.1 MB Notification: Performance of simCode: created initialization part: time 0.0009077/0.1364, allocations: 0.6471 MB / 0.507 GB, free: 4.73 MB / 382.1 MB Notification: Performance of simCode: created event and clocks part: time 1.863e-06/0.1365, allocations: 0 / 0.507 GB, free: 4.73 MB / 382.1 MB Notification: Performance of simCode: created simulation system equations: time 0.0003908/0.1369, allocations: 282.5 kB / 0.5073 GB, free: 4.441 MB / 382.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004184/0.1373, allocations: 71.47 kB / 0.5074 GB, free: 4.375 MB / 382.1 MB Warning: The linear system: 1 : Ge2.Pm = Ge2.Pcmd 2 : Ge2.Pm = Ge2.Pcmd [ -1.0 , 1.0 ; -1.0 , 1.0 ] * [ Ge2.Pcmd ; Ge2.Pm ] = [ 0.0 ; 0.0 ] might be structurally or numerically singular for variable Ge2.Pm since U(2,2) = 0.0. It might be hard to solve. Compilation continues anyway. Warning: The linear system: 1 : Ge1.Pm = Ge1.Pcmd 2 : Ge1.Pm = Ge1.Pcmd [ -1.0 , 1.0 ; -1.0 , 1.0 ] * [ Ge1.Pcmd ; Ge1.Pm ] = [ 0.0 ; 0.0 ] might be structurally or numerically singular for variable Ge1.Pm since U(2,2) = 0.0. It might be hard to solve. Compilation continues anyway. Warning: The linear system: 1 : Ge2.Pm = Ge2.Pcmd 2 : Ge2.Pm = Ge2.Pcmd [ 1.0 , -1.0 ; 1.0 , -1.0 ] * [ Ge2.Pm ; Ge2.Pcmd ] = [ 0.0 ; 0.0 ] might be structurally or numerically singular for variable Ge2.Pcmd since U(2,2) = 0.0. It might be hard to solve. Compilation continues anyway. Warning: The linear system: 1 : Ge1.Pm = Ge1.Pcmd 2 : Ge1.Pm = Ge1.Pcmd [ -1.0 , 1.0 ; -1.0 , 1.0 ] * [ Ge1.Pcmd ; Ge1.Pm ] = [ 0.0 ; 0.0 ] might be structurally or numerically singular for variable Ge1.Pm since U(2,2) = 0.0. It might be hard to solve. Compilation continues anyway. Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.006743/0.144, allocations: 4.785 MB / 0.512 GB, free: 15.3 MB / 398.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004601/0.1445, allocations: 0.8271 MB / 0.5128 GB, free: 14.45 MB / 398.1 MB Notification: Performance of simCode: alias equations: time 0.0001582/0.1447, allocations: 43.27 kB / 0.5129 GB, free: 14.41 MB / 398.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001958/0.1449, allocations: 135.4 kB / 0.513 GB, free: 14.28 MB / 398.1 MB Notification: Performance of SimCode: time 3.31e-07/0.1449, allocations: 0 / 0.513 GB, free: 14.28 MB / 398.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03713/0.182, allocations: 8.162 MB / 0.521 GB, free: 6.258 MB / 398.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 11.75/11.93, allocations: 7.875 kB / 0.521 GB, free: 6.25 MB / 398.1 MB (rm -f AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.pipe ; mkfifo AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.pipe ; head -c 1048576 < AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.pipe >> ../files/AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_AES_AES_Coursework_ElecSys_case_studies_Primary_secondary_tertiary_fmu --startTime=0 --stopTime=2000 --timeout=50 --tolerance=1e-06 AES_AES_Coursework_ElecSys_case_studies_Primary_secondary_tertiary.fmu > AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.pipe 2>&1)