Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.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/BuildSysPro 3.6.0/package.mo", uses=false) Using package BuildSysPro with version 3.5.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/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(BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y") translateModel(BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001259/0.001259, allocations: 109.3 kB / 15.7 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001509/0.001509, allocations: 200.3 kB / 16.64 MB, free: 6.613 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.371/1.371, allocations: 222.9 MB / 240.3 MB, free: 4.352 MB / 190.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/Building/BuildingEnvelope/HeatTransfer/package.mo:2:1-40:17:writable] Warning: Soil_case_nappe was referenced in the package.order file, but was not found in package.mo, Soil_case_nappe/package.mo or Soil_case_nappe.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/package.mo): time 0.9719/0.9719, allocations: 143 MB / 433.5 MB, free: 11.47 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001149/0.001149, allocations: 59.91 kB / 0.5954 GB, free: 8.434 MB / 0.4981 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.4059/0.407, allocations: 82.04 MB / 0.6756 GB, free: 1.508 MB / 0.4981 GB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y): time 0.07321/0.4803, allocations: 75.14 MB / 0.7489 GB, free: 11.13 MB / 0.5762 GB Notification: Performance of NFInst.instExpressions: time 0.01754/0.4978, allocations: 12.77 MB / 0.7614 GB, free: 14.32 MB / 0.5919 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002104/0.5, allocations: 67.62 kB / 0.7615 GB, free: 14.26 MB / 0.5919 GB Notification: Performance of NFTyping.typeComponents: time 0.001977/0.502, allocations: 0.8228 MB / 0.7623 GB, free: 13.43 MB / 0.5919 GB Notification: Performance of NFTyping.typeBindings: time 0.005998/0.508, allocations: 2.468 MB / 0.7647 GB, free: 10.95 MB / 0.5919 GB Notification: Performance of NFTyping.typeClassSections: time 0.003341/0.5114, allocations: 1.394 MB / 0.766 GB, free: 9.57 MB / 0.5919 GB Notification: Performance of NFFlatten.flatten: time 0.005407/0.5168, allocations: 4.402 MB / 0.7703 GB, free: 5.156 MB / 0.5919 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002014/0.5188, allocations: 1.429 MB / 0.7717 GB, free: 3.695 MB / 0.5919 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003491/0.5223, allocations: 1.618 MB / 0.7733 GB, free: 2.078 MB / 0.5919 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0015/0.5238, allocations: 1.198 MB / 0.7745 GB, free: 0.875 MB / 0.5919 GB Notification: Performance of NFPackage.collectConstants: time 0.0002322/0.5241, allocations: 167.9 kB / 0.7747 GB, free: 0.7109 MB / 0.5919 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002873/0.527, allocations: 1.408 MB / 0.776 GB, free: 15.3 MB / 0.6075 GB Notification: Performance of NFScalarize.scalarize: time 0.0003554/0.5273, allocations: 394.6 kB / 0.7764 GB, free: 14.91 MB / 0.6075 GB Notification: Performance of NFVerifyModel.verify: time 0.0009395/0.5283, allocations: 0.906 MB / 0.7773 GB, free: 14 MB / 0.6075 GB Notification: Performance of NFConvertDAE.convert: time 0.003647/0.5319, allocations: 3.005 MB / 0.7802 GB, free: 10.99 MB / 0.6075 GB Notification: Performance of FrontEnd - DAE generated: time 3.767e-06/0.532, allocations: 4 kB / 0.7802 GB, free: 10.99 MB / 0.6075 GB Notification: Performance of FrontEnd: time 1.422e-06/0.532, allocations: 0 / 0.7802 GB, free: 10.99 MB / 0.6075 GB Notification: Performance of Transformations before backend: time 1.95e-05/0.532, allocations: 0 / 0.7802 GB, free: 10.99 MB / 0.6075 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 240 * Number of variables: 240 Notification: Performance of Generate backend data structure: time 0.003795/0.5358, allocations: 2.079 MB / 0.7823 GB, free: 8.84 MB / 0.6075 GB Notification: Performance of prepare preOptimizeDAE: time 4.168e-05/0.5358, allocations: 12.03 kB / 0.7823 GB, free: 8.828 MB / 0.6075 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0008415/0.5367, allocations: 230.8 kB / 0.7825 GB, free: 8.602 MB / 0.6075 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002477/0.5392, allocations: 1.532 MB / 0.784 GB, free: 7.016 MB / 0.6075 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.816e-05/0.5393, allocations: 82 kB / 0.7841 GB, free: 6.934 MB / 0.6075 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001646/0.5394, allocations: 104 kB / 0.7842 GB, free: 6.832 MB / 0.6075 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001997/0.5414, allocations: 1.092 MB / 0.7852 GB, free: 5.707 MB / 0.6075 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.835e-05/0.5415, allocations: 0 / 0.7852 GB, free: 5.707 MB / 0.6075 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.575e-05/0.5416, allocations: 40 kB / 0.7853 GB, free: 5.668 MB / 0.6075 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.848e-05/0.5416, allocations: 28 kB / 0.7853 GB, free: 5.641 MB / 0.6075 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001941/0.5436, allocations: 0.89 MB / 0.7862 GB, free: 4.75 MB / 0.6075 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 0.005669/0.5492, allocations: 4.908 MB / 0.791 GB, free: 15.55 MB / 0.6231 GB Notification: Performance of preOpt comSubExp (simulation): time 0.00145/0.5507, allocations: 0.636 MB / 0.7916 GB, free: 14.91 MB / 0.6231 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007286/0.5514, allocations: 349.3 kB / 0.7919 GB, free: 14.57 MB / 0.6231 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0006332/0.5521, allocations: 0.8277 MB / 0.7927 GB, free: 13.56 MB / 0.6231 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.396e-05/0.5521, allocations: 39.12 kB / 0.7928 GB, free: 13.51 MB / 0.6231 GB Notification: Performance of pre-optimization done (n=61): time 2.114e-06/0.5521, allocations: 0 / 0.7928 GB, free: 13.51 MB / 0.6231 GB Notification: Performance of matching and sorting (n=61): time 0.00745/0.5596, allocations: 1.678 MB / 0.7944 GB, free: 11.81 MB / 0.6231 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.569e-05/0.5597, allocations: 63.91 kB / 0.7945 GB, free: 11.73 MB / 0.6231 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00167/0.5614, allocations: 1.218 MB / 0.7956 GB, free: 10.5 MB / 0.6231 GB Notification: Performance of collectPreVariables (initialization): time 9.109e-05/0.5615, allocations: 45.7 kB / 0.7957 GB, free: 10.45 MB / 0.6231 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004932/0.562, allocations: 0.6026 MB / 0.7963 GB, free: 9.84 MB / 0.6231 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001944/0.5622, allocations: 216.9 kB / 0.7965 GB, free: 9.625 MB / 0.6231 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002276/0.5624, allocations: 154.5 kB / 0.7966 GB, free: 9.465 MB / 0.6231 GB Notification: Performance of setup shared object (initialization): time 0.0001903/0.5626, allocations: 330 kB / 0.7969 GB, free: 9.137 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007379/0.5633, allocations: 292.7 kB / 0.7972 GB, free: 8.848 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009003/0.5642, allocations: 495.8 kB / 0.7977 GB, free: 8.285 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001455/0.5657, allocations: 0.709 MB / 0.7984 GB, free: 7.527 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.208e-06/0.5657, allocations: 0 / 0.7984 GB, free: 7.527 MB / 0.6231 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.004857/0.5706, allocations: 1.277 MB / 0.7996 GB, free: 6.238 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 1.656e-05/0.5706, allocations: 4 kB / 0.7996 GB, free: 6.234 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.568e-06/0.5706, allocations: 7.938 kB / 0.7996 GB, free: 6.227 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005867/0.5712, allocations: 140.9 kB / 0.7998 GB, free: 6.086 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006395/0.5719, allocations: 155.8 kB / 0.7999 GB, free: 5.934 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007964/0.5727, allocations: 0.6967 MB / 0.8006 GB, free: 5.211 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001019/0.5737, allocations: 119.1 kB / 0.8007 GB, free: 5.094 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.346e-05/0.5738, allocations: 35.98 kB / 0.8008 GB, free: 5.059 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001091/0.5749, allocations: 0.5487 MB / 0.8013 GB, free: 4.508 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008498/0.5758, allocations: 495.8 kB / 0.8018 GB, free: 3.949 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001437/0.5772, allocations: 0.705 MB / 0.8025 GB, free: 3.195 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.785e-06/0.5772, allocations: 0 / 0.8025 GB, free: 3.195 MB / 0.6231 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.004874/0.5821, allocations: 1.258 MB / 0.8037 GB, free: 1.926 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 1.695e-05/0.5821, allocations: 12 kB / 0.8037 GB, free: 1.914 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.534e-06/0.5821, allocations: 4 kB / 0.8037 GB, free: 1.91 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.000531/0.5827, allocations: 136.7 kB / 0.8038 GB, free: 1.773 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006467/0.5833, allocations: 155.8 kB / 0.804 GB, free: 1.621 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008951/0.5842, allocations: 0.6967 MB / 0.8047 GB, free: 0.8984 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00116/0.5854, allocations: 99.52 kB / 0.8048 GB, free: 0.8008 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.957e-05/0.5855, allocations: 31.98 kB / 0.8048 GB, free: 0.7695 MB / 0.6231 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * 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 (79): * Single equations (assignments): 78 * 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 {(1,9)} Notification: Performance of prepare postOptimizeDAE: time 0.000283/0.5858, allocations: 235.9 kB / 0.805 GB, free: 0.5312 MB / 0.6231 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002434/0.586, allocations: 134.3 kB / 0.8051 GB, free: 408 kB / 0.6231 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004831/0.5909, allocations: 1.26 MB / 0.8064 GB, free: 15.12 MB / 0.6387 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.336e-05/0.5909, allocations: 12 kB / 0.8064 GB, free: 15.11 MB / 0.6387 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.221e-06/0.5909, allocations: 0 / 0.8064 GB, free: 15.11 MB / 0.6387 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.004237/0.5952, allocations: 1.111 MB / 0.8075 GB, free: 13.96 MB / 0.6387 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.007053/0.6022, allocations: 2.617 MB / 0.81 GB, free: 11.23 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.889e-06/0.6023, allocations: 4 kB / 0.81 GB, free: 11.23 MB / 0.6387 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005231/0.6028, allocations: 119.7 kB / 0.8101 GB, free: 11.11 MB / 0.6387 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005121/0.6033, allocations: 129.2 kB / 0.8103 GB, free: 10.98 MB / 0.6387 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.738e-05/0.6034, allocations: 27.92 kB / 0.8103 GB, free: 10.96 MB / 0.6387 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005017/0.6084, allocations: 2.567 MB / 0.8128 GB, free: 8.227 MB / 0.6387 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.292e-06/0.6084, allocations: 11.88 kB / 0.8128 GB, free: 8.215 MB / 0.6387 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005507/0.6139, allocations: 1.699 MB / 0.8145 GB, free: 6.453 MB / 0.6387 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005476/0.6145, allocations: 315.2 kB / 0.8148 GB, free: 6.125 MB / 0.6387 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000168/0.6147, allocations: 20 kB / 0.8148 GB, free: 6.105 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008063/0.6155, allocations: 55.92 kB / 0.8148 GB, free: 6.051 MB / 0.6387 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001377/0.6156, allocations: 64.3 kB / 0.8149 GB, free: 5.988 MB / 0.6387 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.857e-05/0.6157, allocations: 28.27 kB / 0.8149 GB, free: 5.961 MB / 0.6387 GB Notification: Performance of sorting global known variables: time 0.001228/0.6169, allocations: 0.8855 MB / 0.8158 GB, free: 5.074 MB / 0.6387 GB Notification: Performance of sort global known variables: time 1.31e-07/0.6169, allocations: 0 / 0.8158 GB, free: 5.074 MB / 0.6387 GB Notification: Performance of remove unused functions: time 0.001797/0.6188, allocations: 0.7213 MB / 0.8165 GB, free: 4.352 MB / 0.6387 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 2 (chi.con.vol.dynBal.U,chi.eva.vol.dynBal.U) * 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 (56): * Single equations (assignments): 51 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * 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 {(1,9)} Notification: Performance of Backend phase and start with SimCode phase: time 0.000908/0.6197, allocations: 457.8 kB / 0.8169 GB, free: 3.902 MB / 0.6387 GB Notification: Performance of simCode: created initialization part: time 0.00269/0.6224, allocations: 1.118 MB / 0.818 GB, free: 2.785 MB / 0.6387 GB Notification: Performance of simCode: created event and clocks part: time 4.468e-06/0.6224, allocations: 8.062 kB / 0.818 GB, free: 2.777 MB / 0.6387 GB Notification: Performance of simCode: created simulation system equations: time 0.001536/0.6239, allocations: 0.5563 MB / 0.8186 GB, free: 2.207 MB / 0.6387 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003679/0.6276, allocations: 0.8024 MB / 0.8194 GB, free: 1.426 MB / 0.6387 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003608/0.6312, allocations: 2.264 MB / 0.8216 GB, free: 15.09 MB / 0.6544 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007272/0.632, allocations: 1.172 MB / 0.8227 GB, free: 13.89 MB / 0.6544 GB Notification: Performance of simCode: alias equations: time 0.0009972/0.633, allocations: 298.9 kB / 0.823 GB, free: 13.59 MB / 0.6544 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002351/0.6332, allocations: 107.4 kB / 0.8231 GB, free: 13.48 MB / 0.6544 GB Notification: Performance of SimCode: time 1.943e-06/0.6332, allocations: 0 / 0.8231 GB, free: 13.48 MB / 0.6544 GB Notification: Performance of Templates: time 0.05164/0.6849, allocations: 32.42 MB / 0.8548 GB, free: 13.46 MB / 0.6856 GB make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.makefile (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.Chillers.Examples.Carnot_y.pipe 2>&1)