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 0.008777/0.008777, allocations: 99.34 kB / 15.73 MB, free: 6.008 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001925/0.001925, allocations: 197.3 kB / 16.67 MB, free: 5.934 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.454/1.454, allocations: 222.9 MB / 240.4 MB, free: 4.344 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo): time 0.2298/0.2298, allocations: 22.36 MB / 312.9 MB, free: 12.47 MB / 254.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001461/0.001461, allocations: 60.12 kB / 436.6 MB, free: 34.21 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1015/0.103, allocations: 54.98 MB / 491.6 MB, free: 1.848 MB / 350.1 MB Notification: Performance of NFInst.instantiate(AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary): time 0.003127/0.1061, allocations: 2.514 MB / 494.1 MB, free: 15.32 MB / 366.1 MB Notification: Performance of NFInst.instExpressions: time 0.001337/0.1075, allocations: 0.7718 MB / 494.8 MB, free: 14.54 MB / 366.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001518/0.1077, allocations: 7.938 kB / 494.8 MB, free: 14.54 MB / 366.1 MB Notification: Performance of NFTyping.typeComponents: time 0.000376/0.1081, allocations: 91.28 kB / 494.9 MB, free: 14.45 MB / 366.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0003228/0.1084, allocations: 143.1 kB / 495.1 MB, free: 14.3 MB / 366.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0003596/0.1088, allocations: 191.7 kB / 495.3 MB, free: 14.12 MB / 366.1 MB Notification: Performance of NFFlatten.flatten: time 0.0005003/0.1093, allocations: 0.5187 MB / 495.8 MB, free: 13.6 MB / 366.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0002136/0.1095, allocations: 124.7 kB / 495.9 MB, free: 13.47 MB / 366.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0002905/0.1098, allocations: 223.2 kB / 496.1 MB, free: 13.25 MB / 366.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0002948/0.1101, allocations: 238.9 kB / 496.4 MB, free: 13.02 MB / 366.1 MB Notification: Performance of NFPackage.collectConstants: time 6.031e-05/0.1102, allocations: 36 kB / 496.4 MB, free: 12.98 MB / 366.1 MB Notification: Performance of NFFlatten.collectFunctions: time 4.958e-05/0.1102, allocations: 32 kB / 496.4 MB, free: 12.95 MB / 366.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001279/0.1104, allocations: 115.5 kB / 496.5 MB, free: 12.84 MB / 366.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0001578/0.1105, allocations: 186.9 kB / 496.7 MB, free: 12.66 MB / 366.1 MB Notification: Performance of NFConvertDAE.convert: time 0.000421/0.111, allocations: 410 kB / 497.1 MB, free: 12.25 MB / 366.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.47e-06/0.111, allocations: 0 / 497.1 MB, free: 12.25 MB / 366.1 MB Notification: Performance of FrontEnd: time 1.964e-06/0.111, allocations: 0 / 497.1 MB, free: 12.25 MB / 366.1 MB Notification: Performance of Transformations before backend: time 1.263e-05/0.111, allocations: 0 / 497.1 MB, free: 12.25 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 0.001907/0.1129, allocations: 0.8334 MB / 498 MB, free: 11.37 MB / 366.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.112e-05/0.113, allocations: 8.031 kB / 498 MB, free: 11.36 MB / 366.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 8.291e-05/0.1131, allocations: 66.72 kB / 498 MB, free: 11.29 MB / 366.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 8.166e-05/0.1132, allocations: 56.61 kB / 498.1 MB, free: 11.23 MB / 366.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008692/0.114, allocations: 439.8 kB / 498.5 MB, free: 10.76 MB / 366.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.632e-05/0.1141, allocations: 24.59 kB / 498.5 MB, free: 10.74 MB / 366.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 5.62e-05/0.1141, allocations: 35.98 kB / 498.6 MB, free: 10.7 MB / 366.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004926/0.1146, allocations: 301.7 kB / 498.9 MB, free: 10.39 MB / 366.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.387e-05/0.1147, allocations: 4 kB / 498.9 MB, free: 10.39 MB / 366.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.69e-05/0.1147, allocations: 12 kB / 498.9 MB, free: 10.38 MB / 366.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.257e-06/0.1147, allocations: 8 kB / 498.9 MB, free: 10.37 MB / 366.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000397/0.1151, allocations: 218.1 kB / 499.1 MB, free: 10.16 MB / 366.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001484/0.1166, allocations: 1.034 MB / 0.4884 GB, free: 9.059 MB / 366.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0007465/0.1174, allocations: 383.2 kB / 0.4888 GB, free: 8.676 MB / 366.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002258/0.1176, allocations: 157.2 kB / 0.4889 GB, free: 8.52 MB / 366.1 MB Notification: Performance of preOpt evalFunc (simulation): time 2.176e-05/0.1176, allocations: 4 kB / 0.4889 GB, free: 8.516 MB / 366.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.796e-05/0.1177, allocations: 34.5 kB / 0.489 GB, free: 8.473 MB / 366.1 MB Notification: Performance of pre-optimization done (n=37): time 1.533e-06/0.1177, allocations: 0 / 0.489 GB, free: 8.473 MB / 366.1 MB Notification: Performance of matching and sorting (n=39): time 0.001942/0.1196, allocations: 1.104 MB / 0.49 GB, free: 7.297 MB / 366.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.257e-05/0.1197, allocations: 55.41 kB / 0.4901 GB, free: 7.23 MB / 366.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007389/0.1204, allocations: 433.6 kB / 0.4905 GB, free: 6.797 MB / 366.1 MB Notification: Performance of collectPreVariables (initialization): time 2.703e-05/0.1205, allocations: 33.7 kB / 0.4905 GB, free: 6.758 MB / 366.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0001313/0.1206, allocations: 208.6 kB / 0.4907 GB, free: 6.547 MB / 366.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001014/0.1207, allocations: 146.8 kB / 0.4909 GB, free: 6.402 MB / 366.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 9.95e-05/0.1208, allocations: 78.08 kB / 0.491 GB, free: 6.32 MB / 366.1 MB Notification: Performance of setup shared object (initialization): time 0.000126/0.1209, allocations: 350.8 kB / 0.4913 GB, free: 5.969 MB / 366.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001909/0.1211, allocations: 108.8 kB / 0.4914 GB, free: 5.863 MB / 366.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002255/0.1214, allocations: 177.8 kB / 0.4916 GB, free: 5.664 MB / 366.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001554/0.1229, allocations: 0.6063 MB / 0.4922 GB, free: 5.043 MB / 366.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.507e-06/0.1229, allocations: 4 kB / 0.4922 GB, free: 5.039 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 0.001095/0.124, allocations: 0.8032 MB / 0.4929 GB, free: 4.141 MB / 366.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.76e-05/0.1241, allocations: 8 kB / 0.4929 GB, free: 4.133 MB / 366.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.672e-06/0.1241, allocations: 0 / 0.4929 GB, free: 4.133 MB / 366.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002842/0.1244, allocations: 106.6 kB / 0.4931 GB, free: 4.02 MB / 366.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003573/0.1247, allocations: 79.89 kB / 0.4931 GB, free: 3.941 MB / 366.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004704/0.1294, allocations: 7.952 MB / 0.5009 GB, free: 11.46 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004644/0.1299, allocations: 35.95 kB / 0.5009 GB, free: 11.42 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.604e-05/0.13, allocations: 12 kB / 0.5009 GB, free: 11.41 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 0.0002276/0.1302, allocations: 177.7 kB / 0.5011 GB, free: 11.23 MB / 382.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 7.228e-05/0.1303, allocations: 35.77 kB / 0.5011 GB, free: 11.19 MB / 382.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 8.759e-05/0.1304, allocations: 56.05 kB / 0.5012 GB, free: 11.13 MB / 382.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.92e-06/0.1304, allocations: 7.984 kB / 0.5012 GB, free: 11.12 MB / 382.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.15e-06/0.1304, allocations: 4 kB / 0.5012 GB, free: 11.12 MB / 382.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.188e-06/0.1304, allocations: 0 / 0.5012 GB, free: 11.12 MB / 382.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001332/0.1318, allocations: 0.8861 MB / 0.5021 GB, free: 10.17 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.795e-06/0.1318, allocations: 0 / 0.5021 GB, free: 10.17 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002975/0.1321, allocations: 59.91 kB / 0.5021 GB, free: 10.11 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002465/0.1323, allocations: 84.91 kB / 0.5022 GB, free: 10.03 MB / 382.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.601e-05/0.1324, allocations: 8 kB / 0.5022 GB, free: 10.02 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001622/0.134, allocations: 1.893 MB / 0.5041 GB, free: 7.992 MB / 382.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.162e-06/0.134, allocations: 0 / 0.5041 GB, free: 7.992 MB / 382.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0008689/0.1349, allocations: 0.6159 MB / 0.5047 GB, free: 7.359 MB / 382.1 MB Notification: Performance of postOpt removeConstants (simulation): time 9.904e-05/0.135, allocations: 112.9 kB / 0.5048 GB, free: 7.23 MB / 382.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.004e-05/0.135, allocations: 12 kB / 0.5048 GB, free: 7.219 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003766/0.1354, allocations: 43.95 kB / 0.5048 GB, free: 7.176 MB / 382.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.292e-05/0.1355, allocations: 35.83 kB / 0.5049 GB, free: 7.141 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.404e-05/0.1356, allocations: 8 kB / 0.5049 GB, free: 7.133 MB / 382.1 MB Notification: Performance of sorting global known variables: time 0.0006199/0.1362, allocations: 327.1 kB / 0.5052 GB, free: 6.816 MB / 382.1 MB Notification: Performance of sort global known variables: time 1.7e-07/0.1362, allocations: 0 / 0.5052 GB, free: 6.816 MB / 382.1 MB Notification: Performance of remove unused functions: time 0.0005231/0.1367, allocations: 80 kB / 0.5053 GB, free: 6.738 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 0.001185/0.1379, allocations: 1.172 MB / 0.5064 GB, free: 5.531 MB / 382.1 MB Notification: Performance of simCode: created initialization part: time 0.0008664/0.1388, allocations: 0.6429 MB / 0.507 GB, free: 4.848 MB / 382.1 MB Notification: Performance of simCode: created event and clocks part: time 1.994e-06/0.1388, allocations: 320 / 0.507 GB, free: 4.848 MB / 382.1 MB Notification: Performance of simCode: created simulation system equations: time 0.0003832/0.1392, allocations: 286.5 kB / 0.5073 GB, free: 4.555 MB / 382.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004277/0.1396, allocations: 69.41 kB / 0.5074 GB, free: 4.488 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 0.006293/0.1459, allocations: 4.773 MB / 0.512 GB, free: 15.43 MB / 398.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003719/0.1463, allocations: 0.8349 MB / 0.5128 GB, free: 14.57 MB / 398.1 MB Notification: Performance of simCode: alias equations: time 0.0001599/0.1465, allocations: 47.27 kB / 0.5129 GB, free: 14.52 MB / 398.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001905/0.1467, allocations: 131.4 kB / 0.513 GB, free: 14.4 MB / 398.1 MB Notification: Performance of SimCode: time 3e-07/0.1467, allocations: 0 / 0.513 GB, free: 14.4 MB / 398.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03104/0.1777, allocations: 8.167 MB / 0.521 GB, free: 6.371 MB / 398.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 12.07/12.25, allocations: 4.062 kB / 0.521 GB, free: 6.367 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 & python3 -m fmpy simulate --output-file AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary_res.csv --start-time 0 --stop-time 2000 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.4 AES_AES_Coursework_ElecSys_case_studies_Primary_secondary_tertiary.fmu > AES_AES.Coursework.ElecSys_case_studies.Primary_secondary_tertiary.pipe 2>&1)