Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr AixLib_latest_AixLib.Obsolete.Year2021.Fluid.Examples.PumpHydraulicResistance_closedLoop.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/Modelica_DeviceDrivers 2.1.1/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/package.mo", uses=false) Using package AixLib with version 1.4.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/package.mo) Using package SDF with version 0.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo) Using package Modelica_DeviceDrivers with version 2.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1/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: translateModel(AixLib.Obsolete.Year2021.Fluid.Examples.PumpHydraulicResistance_closedLoop,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2880,variableFilter="",fileNamePrefix="AixLib_latest_AixLib.Obsolete.Year2021.Fluid.Examples.PumpHydraulicResistance_closedLoop") translateModel(AixLib.Obsolete.Year2021.Fluid.Examples.PumpHydraulicResistance_closedLoop,tolerance=1e-06,outputFormat="empty",numberOfIntervals=2880,variableFilter="",fileNamePrefix="AixLib_latest_AixLib.Obsolete.Year2021.Fluid.Examples.PumpHydraulicResistance_closedLoop") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001089/0.001089, 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/Complex 4.0.0+maint.om/package.mo): time 0.001106/0.001107, allocations: 197.8 kB / 16.14 MB, free: 6.66 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.448/1.448, allocations: 222.9 MB / 239.8 MB, free: 4.57 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1/package.mo): time 0.2149/0.2149, allocations: 12 MB / 302 MB, free: 0.8945 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo): time 0.0006563/0.0006561, allocations: 27.94 kB / 355 MB, free: 4.008 MB / 286.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:6228:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:6853:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:8435:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:9369:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:11505:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:12875:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/ThermalZones/HighOrder/Components/Examples/DryAir/DryAir_test.mo:71:18-71:405:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/ThermalZones/HighOrder/Components/DryAir/InfiltrationRate_DIN12831.mo:20:192-20:2066:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/ThermalZones/HighOrder/Components/DryAir/InfiltrationRate_DIN12831.mo:20:192-20:4252:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/DataBase/Weather/SurfaceOrientation/SurfaceOrientationData_N_E_S_W_RoofN_Roof_S.mo:5:35-5:362:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/DataBase/Weather/SurfaceOrientation/SurfaceOrientationData_N_E_S_W_Hor.mo:5:35-5:320:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/DataBase/Weather/SurfaceOrientation/SurfaceOrientationData_NE_SE_SW_NW_Hor.mo:5:35-5:324:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/DataBase/CHP/CHPDataSimple/CHP_XRGI_9kWel.mo:25:34-25:588:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/DataBase/CHP/CHPDataSimple/CHP_XRGI_9kWel.mo:25:34-25:3852:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/DataBase/CHP/CHPDataSimple/CHP_Cleanergy_C9G.mo:36:34-36:594:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/BoundaryConditions/InternalGains/Examples/InternalGains/Machines.mo:31:20-31:400:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/BoundaryConditions/InternalGains/Examples/InternalGains/Lights.mo:27:20-27:398:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/package.mo): time 2.049/2.049, allocations: 272.2 MB / 0.6644 GB, free: 13.12 MB / 478.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001886/0.001886, allocations: 107.5 kB / 0.7841 GB, free: 31.77 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2494/0.2513, allocations: 109.2 MB / 0.8907 GB, free: 12.85 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(AixLib.Obsolete.Year2021.Fluid.Examples.PumpHydraulicResistance_closedLoop): time 0.02107/0.2725, allocations: 19.15 MB / 0.9094 GB, free: 9.609 MB / 0.6232 GB Notification: Performance of NFInst.instExpressions: time 0.008571/0.2811, allocations: 5.066 MB / 0.9144 GB, free: 4.531 MB / 0.6232 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.000678/0.2818, allocations: 11.94 kB / 0.9144 GB, free: 4.52 MB / 0.6232 GB Notification: Performance of NFTyping.typeComponents: time 0.001122/0.2829, allocations: 318.6 kB / 0.9147 GB, free: 4.207 MB / 0.6232 GB Notification: Performance of NFTyping.typeBindings: time 0.002041/0.285, allocations: 0.7038 MB / 0.9154 GB, free: 3.504 MB / 0.6232 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/Year2021/Fluid/Movers/Pump.mo:39:3-39:48:writable] Warning: Conditional component ‘V_flow‘ is used in a non-connect context. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.4.0-development/Obsolete/Year2021/Fluid/Movers/Pump.mo:49:7-49:152:writable] Warning: Conditional component ‘V_flow‘ is used in a non-connect context. Notification: Performance of NFTyping.typeClassSections: time 0.001943/0.287, allocations: 0.6157 MB / 0.916 GB, free: 2.891 MB / 0.6232 GB Notification: Performance of NFFlatten.flatten: time 0.001834/0.2888, allocations: 1.484 MB / 0.9174 GB, free: 1.406 MB / 0.6232 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0005406/0.2894, allocations: 321.4 kB / 0.9177 GB, free: 1.086 MB / 0.6232 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0009975/0.2904, allocations: 470 kB / 0.9182 GB, free: 0.625 MB / 0.6232 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0005584/0.291, allocations: 422.3 kB / 0.9186 GB, free: 216 kB / 0.6232 GB Notification: Performance of NFPackage.collectConstants: time 8.11e-05/0.2911, allocations: 28 kB / 0.9186 GB, free: 188 kB / 0.6232 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001657/0.2927, allocations: 0.7798 MB / 0.9194 GB, free: 15.4 MB / 0.6388 GB Notification: Performance of NFScalarize.scalarize: time 0.0001892/0.2929, allocations: 191.2 kB / 0.9195 GB, free: 15.21 MB / 0.6388 GB Notification: Performance of NFVerifyModel.verify: time 0.0003/0.2932, allocations: 306.2 kB / 0.9198 GB, free: 14.91 MB / 0.6388 GB Notification: Performance of NFConvertDAE.convert: time 0.001254/0.2945, allocations: 1.098 MB / 0.9209 GB, free: 13.81 MB / 0.6388 GB Notification: Performance of FrontEnd - DAE generated: time 7.394e-06/0.2945, allocations: 4 kB / 0.9209 GB, free: 13.81 MB / 0.6388 GB Notification: Performance of FrontEnd: time 1.202e-06/0.2945, allocations: 0 / 0.9209 GB, free: 13.81 MB / 0.6388 GB Notification: Performance of Transformations before backend: time 9.618e-06/0.2945, allocations: 0 / 0.9209 GB, free: 13.81 MB / 0.6388 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 51 * Number of variables: 51 Notification: Performance of Generate backend data structure: time 0.001933/0.2965, allocations: 1.074 MB / 0.922 GB, free: 12.68 MB / 0.6388 GB Notification: Performance of prepare preOptimizeDAE: time 3.761e-05/0.2965, allocations: 12.59 kB / 0.922 GB, free: 12.67 MB / 0.6388 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001618/0.2967, allocations: 76.08 kB / 0.922 GB, free: 12.6 MB / 0.6388 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001099/0.2978, allocations: 0.6668 MB / 0.9227 GB, free: 11.89 MB / 0.6388 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 7.053e-05/0.2979, allocations: 42.14 kB / 0.9227 GB, free: 11.84 MB / 0.6388 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.407e-05/0.2979, allocations: 24 kB / 0.9228 GB, free: 11.82 MB / 0.6388 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0004945/0.2984, allocations: 279.1 kB / 0.923 GB, free: 11.54 MB / 0.6388 GB Notification: Performance of preOpt findStateOrder (simulation): time 8.997e-06/0.2984, allocations: 4 kB / 0.923 GB, free: 11.53 MB / 0.6388 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.964e-05/0.2985, allocations: 8 kB / 0.923 GB, free: 11.52 MB / 0.6388 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 8.115e-06/0.2985, allocations: 8 kB / 0.923 GB, free: 11.52 MB / 0.6388 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005722/0.2991, allocations: 273.6 kB / 0.9233 GB, free: 11.25 MB / 0.6388 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 0.00216/0.3012, allocations: 1.664 MB / 0.9249 GB, free: 9.422 MB / 0.6388 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007994/0.3021, allocations: 275.7 kB / 0.9252 GB, free: 9.145 MB / 0.6388 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002078/0.3023, allocations: 128.7 kB / 0.9253 GB, free: 9.016 MB / 0.6388 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001496/0.3038, allocations: 1.476 MB / 0.9268 GB, free: 7.328 MB / 0.6388 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0002897/0.3041, allocations: 152.1 kB / 0.9269 GB, free: 7.168 MB / 0.6388 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0001393/0.3042, allocations: 31.83 kB / 0.9269 GB, free: 7.137 MB / 0.6388 GB Notification: Performance of pre-optimization done (n=23): time 2.114e-06/0.3042, allocations: 0 / 0.9269 GB, free: 7.137 MB / 0.6388 GB Notification: Performance of matching and sorting (n=23): time 0.006132/0.3104, allocations: 1.021 MB / 0.9279 GB, free: 6.09 MB / 0.6388 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.323e-05/0.3104, allocations: 51.41 kB / 0.928 GB, free: 6.027 MB / 0.6388 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001113/0.3116, allocations: 0.9143 MB / 0.9289 GB, free: 5.102 MB / 0.6388 GB Notification: Performance of collectPreVariables (initialization): time 3.398e-05/0.3116, allocations: 33.7 kB / 0.9289 GB, free: 5.062 MB / 0.6388 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002634/0.3119, allocations: 296.5 kB / 0.9292 GB, free: 4.77 MB / 0.6388 GB Notification: Performance of collectInitialBindings (initialization): time 6.953e-05/0.312, allocations: 74.94 kB / 0.9293 GB, free: 4.695 MB / 0.6388 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001163/0.3121, allocations: 61.92 kB / 0.9293 GB, free: 4.629 MB / 0.6388 GB Notification: Performance of setup shared object (initialization): time 0.0001155/0.3122, allocations: 318 kB / 0.9296 GB, free: 4.312 MB / 0.6388 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001519/0.3124, allocations: 73.77 kB / 0.9297 GB, free: 4.238 MB / 0.6388 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002307/0.3126, allocations: 162.3 kB / 0.9298 GB, free: 4.047 MB / 0.6388 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0003404/0.3129, allocations: 205 kB / 0.93 GB, free: 3.828 MB / 0.6388 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.595e-06/0.313, allocations: 0 / 0.93 GB, free: 3.828 MB / 0.6388 GB Notification: Performance of matching and sorting (n=27) (initialization): time 0.00257/0.3155, allocations: 0.538 MB / 0.9306 GB, free: 3.281 MB / 0.6388 GB Notification: Performance of prepare postOptimizeDAE: time 2.115e-05/0.3156, allocations: 8 kB / 0.9306 GB, free: 3.273 MB / 0.6388 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.354e-06/0.3156, allocations: 8.031 kB / 0.9306 GB, free: 3.266 MB / 0.6388 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00224/0.3178, allocations: 320.5 kB / 0.9309 GB, free: 2.949 MB / 0.6388 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001056/0.3179, allocations: 27.98 kB / 0.9309 GB, free: 2.922 MB / 0.6388 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003367/0.3213, allocations: 6.352 MB / 0.9371 GB, free: 12.16 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004446/0.3218, allocations: 23.97 kB / 0.9371 GB, free: 12.14 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.329e-05/0.3218, allocations: 16 kB / 0.9372 GB, free: 12.12 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0003897/0.3222, allocations: 256 kB / 0.9374 GB, free: 11.87 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0001992/0.3224, allocations: 153.5 kB / 0.9375 GB, free: 11.68 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0003064/0.3228, allocations: 202.2 kB / 0.9377 GB, free: 11.47 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.212e-06/0.3228, allocations: 0 / 0.9377 GB, free: 11.47 MB / 0.6544 GB Notification: Performance of matching and sorting (n=27) (initialization_lambda0): time 0.002518/0.3253, allocations: 0.5258 MB / 0.9383 GB, free: 10.93 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 9.748e-06/0.3253, allocations: 4 kB / 0.9383 GB, free: 10.93 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.448e-06/0.3253, allocations: 4 kB / 0.9383 GB, free: 10.93 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001774/0.3271, allocations: 268.7 kB / 0.9385 GB, free: 10.66 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 9.826e-05/0.3272, allocations: 27.92 kB / 0.9385 GB, free: 10.63 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003392/0.3306, allocations: 6.35 MB / 0.9447 GB, free: 3.871 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004385/0.3311, allocations: 31.88 kB / 0.9448 GB, free: 3.84 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.842e-05/0.3311, allocations: 8 kB / 0.9448 GB, free: 3.832 MB / 0.6544 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 4 ($whenCondition1,NightSignal.pulseStart,$PRE.NightSignal.pulseStart,NightSignal.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (15): * Single equations (assignments): 12 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 2 systems {1, 1} * Without analytic Jacobian (size): 0 systems 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 {(1,12)} Notification: Performance of prepare postOptimizeDAE: time 0.0002015/0.3313, allocations: 204.2 kB / 0.945 GB, free: 3.625 MB / 0.6544 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 9.828e-05/0.3314, allocations: 63.25 kB / 0.945 GB, free: 3.562 MB / 0.6544 GB Warning: After manipulating the system with postOptModule wrapFunctionCalls the system is unbalanced. This indicates that the original system is singular. You can use -d=dumpCSE and -d=dumpCSE_verbose for more information. Error: Too few equations, under-determined system. The model has 38 equation(s) and 40 variable(s). Error: Internal error Transformation Module PFPlusExt index Reduction Method Pantelides failed! Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0008243/0.3322, allocations: 394.7 kB / 0.9454 GB, free: 3.195 MB / 0.6544 GB Error: post-optimization module wrapFunctionCalls (simulation) failed.