Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger") translateModel(Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00881/0.00881, allocations: 102.3 kB / 15.73 MB, free: 6.055 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001367/0.001367, allocations: 191 kB / 16.67 MB, free: 5.969 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.575/1.575, allocations: 205.1 MB / 222.5 MB, free: 4.516 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.616/1.616, allocations: 251.7 MB / 0.5094 GB, free: 3.027 MB / 414.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001775/0.001775, allocations: 67.91 kB / 0.7258 GB, free: 9.008 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2683/0.2701, allocations: 104.7 MB / 0.828 GB, free: 196 kB / 0.6387 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger): time 0.02932/0.2994, allocations: 28.58 MB / 0.8559 GB, free: 3.496 MB / 0.67 GB Notification: Performance of NFInst.instExpressions: time 0.01249/0.3119, allocations: 7.829 MB / 0.8636 GB, free: 11.65 MB / 0.6856 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001732/0.3138, allocations: 31.81 kB / 0.8636 GB, free: 11.62 MB / 0.6856 GB Notification: Performance of NFTyping.typeComponents: time 0.001528/0.3153, allocations: 425.2 kB / 0.864 GB, free: 11.2 MB / 0.6856 GB Notification: Performance of NFTyping.typeBindings: time 0.003551/0.3189, allocations: 1.053 MB / 0.8651 GB, free: 10.14 MB / 0.6856 GB Notification: Performance of NFTyping.typeClassSections: time 0.003298/0.3222, allocations: 1.054 MB / 0.8661 GB, free: 9.094 MB / 0.6856 GB Notification: Performance of NFFlatten.flatten: time 0.006532/0.3288, allocations: 4.88 MB / 0.8709 GB, free: 4.199 MB / 0.6856 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003313/0.3321, allocations: 2.277 MB / 0.8731 GB, free: 1.887 MB / 0.6856 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004243/0.3363, allocations: 1.807 MB / 0.8748 GB, free: 88 kB / 0.6856 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002717/0.3391, allocations: 1.447 MB / 0.8763 GB, free: 14.63 MB / 0.7012 GB Notification: Performance of NFPackage.collectConstants: time 0.0007852/0.3399, allocations: 232 kB / 0.8765 GB, free: 14.41 MB / 0.7012 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003403/0.3433, allocations: 1.307 MB / 0.8778 GB, free: 13.1 MB / 0.7012 GB Notification: Performance of NFScalarize.scalarize: time 0.0006048/0.3439, allocations: 0.5529 MB / 0.8783 GB, free: 12.54 MB / 0.7012 GB Notification: Performance of NFVerifyModel.verify: time 0.001603/0.3455, allocations: 1.144 MB / 0.8794 GB, free: 11.39 MB / 0.7012 GB Notification: Performance of NFConvertDAE.convert: time 0.004146/0.3497, allocations: 3.642 MB / 0.883 GB, free: 7.742 MB / 0.7012 GB Notification: Performance of FrontEnd - DAE generated: time 5.219e-06/0.3497, allocations: 0 / 0.883 GB, free: 7.742 MB / 0.7012 GB Notification: Performance of FrontEnd: time 1.713e-06/0.3497, allocations: 0 / 0.883 GB, free: 7.742 MB / 0.7012 GB Notification: Performance of Transformations before backend: time 2.728e-05/0.3497, allocations: 0 / 0.883 GB, free: 7.742 MB / 0.7012 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 348 * Number of variables: 348 Notification: Performance of Generate backend data structure: time 0.004312/0.3541, allocations: 2.538 MB / 0.8854 GB, free: 5.148 MB / 0.7012 GB Notification: Performance of prepare preOptimizeDAE: time 4.22e-05/0.3541, allocations: 12.03 kB / 0.8855 GB, free: 5.137 MB / 0.7012 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007093/0.3548, allocations: 230.5 kB / 0.8857 GB, free: 4.91 MB / 0.7012 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002605/0.3574, allocations: 1.757 MB / 0.8874 GB, free: 3.098 MB / 0.7012 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.038e-05/0.3575, allocations: 114.7 kB / 0.8875 GB, free: 2.984 MB / 0.7012 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002387/0.3578, allocations: 163.9 kB / 0.8877 GB, free: 2.824 MB / 0.7012 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002761/0.3605, allocations: 1.974 MB / 0.8896 GB, free: 0.7852 MB / 0.7012 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.966e-05/0.3606, allocations: 4 kB / 0.8896 GB, free: 0.7812 MB / 0.7012 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001291/0.3607, allocations: 59.98 kB / 0.8896 GB, free: 0.7227 MB / 0.7012 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.605e-05/0.3608, allocations: 40 kB / 0.8897 GB, free: 0.6836 MB / 0.7012 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002499/0.3633, allocations: 1.798 MB / 0.8914 GB, free: 14.88 MB / 0.7169 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 0.01011/0.3734, allocations: 7.574 MB / 0.8988 GB, free: 6.996 MB / 0.7169 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001767/0.3752, allocations: 1.44 MB / 0.9002 GB, free: 5.527 MB / 0.7169 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008274/0.376, allocations: 0.6603 MB / 0.9009 GB, free: 4.863 MB / 0.7169 GB Notification: Performance of preOpt evalFunc (simulation): time 0.005767/0.3818, allocations: 3.851 MB / 0.9046 GB, free: 0.6953 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.497e-05/0.3818, allocations: 39.56 kB / 0.9047 GB, free: 0.6484 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=88): time 2.194e-06/0.3819, allocations: 3.938 kB / 0.9047 GB, free: 0.6445 MB / 0.7169 GB Notification: Performance of matching and sorting (n=88): time 0.002356/0.3842, allocations: 1.506 MB / 0.9062 GB, free: 15.13 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.466e-05/0.3843, allocations: 68.34 kB / 0.9062 GB, free: 15.05 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002088/0.3864, allocations: 1.628 MB / 0.9078 GB, free: 13.41 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 8.594e-05/0.3865, allocations: 49.7 kB / 0.9079 GB, free: 13.35 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005919/0.3871, allocations: 0.7417 MB / 0.9086 GB, free: 12.61 MB / 0.7325 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002727/0.3873, allocations: 315.5 kB / 0.9089 GB, free: 12.29 MB / 0.7325 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000396/0.3878, allocations: 287.4 kB / 0.9092 GB, free: 12.01 MB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 0.0001389/0.3879, allocations: 365.9 kB / 0.9095 GB, free: 11.64 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009571/0.3889, allocations: 0.6995 MB / 0.9102 GB, free: 10.94 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001193/0.3901, allocations: 1.016 MB / 0.9112 GB, free: 9.793 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001971/0.392, allocations: 1.624 MB / 0.9128 GB, free: 8.043 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.058e-05/0.3921, allocations: 7.938 kB / 0.9128 GB, free: 8.035 MB / 0.7325 GB Notification: Performance of matching and sorting (n=175) (initialization): time 0.002967/0.395, allocations: 1.94 MB / 0.9147 GB, free: 6.086 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 2.777e-05/0.3951, allocations: 8.219 kB / 0.9147 GB, free: 6.078 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.752e-05/0.3951, allocations: 16 kB / 0.9147 GB, free: 6.062 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.196e-05/0.3951, allocations: 19.98 kB / 0.9147 GB, free: 6.043 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001199/0.3963, allocations: 331.5 kB / 0.915 GB, free: 5.719 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.544e-05/0.3964, allocations: 23.92 kB / 0.9151 GB, free: 5.695 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001154/0.3975, allocations: 198 kB / 0.9152 GB, free: 5.5 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000114/0.3977, allocations: 59.98 kB / 0.9153 GB, free: 5.441 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001814/0.3995, allocations: 1.277 MB / 0.9166 GB, free: 4.16 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001168/0.4007, allocations: 1.016 MB / 0.9175 GB, free: 3.02 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001991/0.4027, allocations: 1.624 MB / 0.9191 GB, free: 1.273 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 7.323e-06/0.4027, allocations: 4 kB / 0.9191 GB, free: 1.27 MB / 0.7325 GB Notification: Performance of matching and sorting (n=175) (initialization_lambda0): time 0.583/0.9857, allocations: 1.945 MB / 0.921 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 3.46e-05/0.9858, allocations: 8.75 kB / 0.921 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.057e-05/0.9858, allocations: 9.219 kB / 0.921 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.397e-05/0.9858, allocations: 17.41 kB / 0.9211 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001398/0.9872, allocations: 332.4 kB / 0.9214 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.257e-05/0.9873, allocations: 21.45 kB / 0.9214 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001461/0.9887, allocations: 154 kB / 0.9215 GB, free: 87.75 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001378/0.9889, allocations: 58.95 kB / 0.9216 GB, free: 87.75 MB / 0.7325 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 40 * 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 (175): * Single equations (assignments): 175 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0003415/0.9892, allocations: 263.3 kB / 0.9219 GB, free: 87.57 MB / 0.7325 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003591/0.9896, allocations: 147.4 kB / 0.922 GB, free: 87.57 MB / 0.7325 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002535/0.9921, allocations: 1.283 MB / 0.9233 GB, free: 87.5 MB / 0.7325 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.225e-05/0.9922, allocations: 12.36 kB / 0.9233 GB, free: 87.5 MB / 0.7325 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.062e-05/0.9922, allocations: 0.6562 kB / 0.9233 GB, free: 87.5 MB / 0.7325 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001709/0.9939, allocations: 1.283 MB / 0.9245 GB, free: 87.04 MB / 0.7325 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006038/1, allocations: 2.94 MB / 0.9274 GB, free: 85.86 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.006e-05/1, allocations: 2.5 kB / 0.9274 GB, free: 85.86 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0008638/1.001, allocations: 185.1 kB / 0.9276 GB, free: 85.86 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.264e-05/1.001, allocations: 8.703 kB / 0.9276 GB, free: 85.86 MB / 0.7325 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.109e-05/1.001, allocations: 27.58 kB / 0.9276 GB, free: 85.84 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.163e-05/1.001, allocations: 6.656 kB / 0.9276 GB, free: 85.84 MB / 0.7325 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.158e-06/1.001, allocations: 2 kB / 0.9276 GB, free: 85.84 MB / 0.7325 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003657/1.005, allocations: 1.912 MB / 0.9295 GB, free: 85.09 MB / 0.7325 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001434/1.006, allocations: 393.8 kB / 0.9299 GB, free: 84.85 MB / 0.7325 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002949/1.006, allocations: 28.89 kB / 0.9299 GB, free: 84.83 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009279/1.007, allocations: 50.33 kB / 0.9299 GB, free: 84.82 MB / 0.7325 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002239/1.008, allocations: 50 kB / 0.93 GB, free: 84.82 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001476/1.008, allocations: 34.73 kB / 0.93 GB, free: 84.81 MB / 0.7325 GB Notification: Performance of sorting global known variables: time 0.003787/1.012, allocations: 1.223 MB / 0.9312 GB, free: 84.36 MB / 0.7325 GB Notification: Performance of sort global known variables: time 9.42e-07/1.012, allocations: 0 / 0.9312 GB, free: 84.36 MB / 0.7325 GB Notification: Performance of remove unused functions: time 0.004894/1.016, allocations: 0.9105 MB / 0.9321 GB, free: 84.23 MB / 0.7325 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 6 (indTanHex.vol[1].dynBal.U,indTanHex.vol[2].dynBal.U,indTanHex.vol[3].dynBal.U,indTanHex.cap[1].T,indTanHex.cap[2].T,indTanHex.cap[3].T) * 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 (89): * Single equations (assignments): 87 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001419/1.018, allocations: 364.8 kB / 0.9324 GB, free: 84.12 MB / 0.7325 GB Notification: Performance of simCode: created initialization part: time 0.004563/1.022, allocations: 2.339 MB / 0.9347 GB, free: 83.39 MB / 0.7325 GB Notification: Performance of simCode: created event and clocks part: time 6.182e-06/1.022, allocations: 1.438 kB / 0.9347 GB, free: 83.39 MB / 0.7325 GB Notification: Performance of simCode: created simulation system equations: time 0.0008423/1.023, allocations: 0.5212 MB / 0.9352 GB, free: 83.23 MB / 0.7325 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004007/1.027, allocations: 0.9266 MB / 0.9361 GB, free: 83.01 MB / 0.7325 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.006593/1.034, allocations: 3.641 MB / 0.9397 GB, free: 81.37 MB / 0.7325 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001535/1.036, allocations: 1.662 MB / 0.9413 GB, free: 80.46 MB / 0.7325 GB Notification: Performance of simCode: alias equations: time 0.003094/1.039, allocations: 0.9137 MB / 0.9422 GB, free: 80.38 MB / 0.7325 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000436/1.039, allocations: 133 kB / 0.9423 GB, free: 80.36 MB / 0.7325 GB Notification: Performance of SimCode: time 1.754e-06/1.039, allocations: 0 / 0.9423 GB, free: 80.36 MB / 0.7325 GB Notification: Performance of Templates: time 0.06226/1.101, allocations: 35.87 MB / 0.9774 GB, free: 57.38 MB / 0.7325 GB make -j1 -f Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.makefile (rm -f Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.sim & ./Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.Fluid.Storage.BaseClasses.Examples.IndirectTankHeatExchanger.pipe 2>&1)