Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.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.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity") translateModel(BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009841/0.0009844, allocations: 98.72 kB / 16.02 MB, free: 76 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001127/0.001127, allocations: 185 kB / 16.92 MB, free: 6.895 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.416/1.416, allocations: 223.3 MB / 241 MB, free: 5.254 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 1.058/1.058, allocations: 143.2 MB / 435.3 MB, free: 13.68 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003506/0.0003507, allocations: 12 kB / 0.517 GB, free: 11.1 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1619/0.1623, allocations: 83.42 MB / 0.5985 GB, free: 7.648 MB / 0.4981 GB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity): time 0.3245/0.4868, allocations: 30.85 MB / 0.6286 GB, free: 26.3 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.007989/0.4948, allocations: 5.33 MB / 0.6338 GB, free: 22.57 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001302/0.4962, allocations: 31.53 kB / 0.6339 GB, free: 22.55 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.001017/0.4972, allocations: 327.7 kB / 0.6342 GB, free: 22.37 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.003591/0.5008, allocations: 1.324 MB / 0.6355 GB, free: 21.61 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.001991/0.5028, allocations: 0.7593 MB / 0.6362 GB, free: 21.2 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.003084/0.5059, allocations: 2.856 MB / 0.639 GB, free: 20.16 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0007506/0.5067, allocations: 0.497 MB / 0.6395 GB, free: 19.96 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001166/0.5079, allocations: 0.6606 MB / 0.6401 GB, free: 19.68 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0006507/0.5085, allocations: 0.5417 MB / 0.6407 GB, free: 19.45 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 5.864e-05/0.5086, allocations: 22.69 kB / 0.6407 GB, free: 19.45 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002202/0.5108, allocations: 1.138 MB / 0.6418 GB, free: 19.04 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.0001502/0.511, allocations: 132.8 kB / 0.6419 GB, free: 18.98 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.0003691/0.5114, allocations: 368.3 kB / 0.6423 GB, free: 18.76 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.001448/0.5128, allocations: 1.144 MB / 0.6434 GB, free: 18.5 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 5.089e-06/0.5128, allocations: 0 / 0.6434 GB, free: 18.5 MB / 0.4981 GB Notification: Performance of FrontEnd: time 2.335e-06/0.5128, allocations: 4 kB / 0.6434 GB, free: 18.5 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 8.406e-06/0.5129, allocations: 0 / 0.6434 GB, free: 18.5 MB / 0.4981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 110 * Number of variables: 110 Notification: Performance of Generate backend data structure: time 0.001323/0.5142, allocations: 0.9589 MB / 0.6443 GB, free: 17.77 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 4.297e-05/0.5142, allocations: 7.938 kB / 0.6443 GB, free: 17.77 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002258/0.5165, allocations: 287.2 kB / 0.6446 GB, free: 17.71 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00115/0.5177, allocations: 0.6719 MB / 0.6453 GB, free: 17.29 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.033e-05/0.5177, allocations: 34.59 kB / 0.6453 GB, free: 17.27 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 7.009e-05/0.5178, allocations: 54.12 kB / 0.6454 GB, free: 17.25 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007999/0.5186, allocations: 0.5247 MB / 0.6459 GB, free: 16.97 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.813e-05/0.5186, allocations: 0 / 0.6459 GB, free: 16.97 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.235e-05/0.5187, allocations: 21.44 kB / 0.6459 GB, free: 16.95 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.085e-05/0.5187, allocations: 11.16 kB / 0.6459 GB, free: 16.95 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006004/0.5193, allocations: 361.7 kB / 0.6462 GB, free: 16.82 MB / 0.4981 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 0.002343/0.5216, allocations: 2.821 MB / 0.649 GB, free: 14.52 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0004814/0.5221, allocations: 308.8 kB / 0.6493 GB, free: 14.37 MB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000231/0.5224, allocations: 143.2 kB / 0.6494 GB, free: 14.31 MB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003527/0.5227, allocations: 0.6652 MB / 0.6501 GB, free: 13.54 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 1.846e-05/0.5228, allocations: 37.42 kB / 0.6501 GB, free: 13.5 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=28): time 2.235e-06/0.5228, allocations: 0 / 0.6501 GB, free: 13.5 MB / 0.4981 GB Notification: Performance of matching and sorting (n=40): time 0.005969/0.5288, allocations: 2.091 MB / 0.6522 GB, free: 12.44 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.079e-05/0.5288, allocations: 85.45 kB / 0.6522 GB, free: 12.34 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006492/0.5295, allocations: 0.5248 MB / 0.6527 GB, free: 12.1 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 3.465e-05/0.5295, allocations: 29.7 kB / 0.6528 GB, free: 12.06 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001615/0.5297, allocations: 325.2 kB / 0.6531 GB, free: 11.8 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 9.262e-05/0.5298, allocations: 142 kB / 0.6532 GB, free: 11.69 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 5.812e-05/0.5298, allocations: 41.09 kB / 0.6533 GB, free: 11.66 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 7.647e-05/0.5299, allocations: 364.5 kB / 0.6536 GB, free: 11.32 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003467/0.5303, allocations: 170.9 kB / 0.6538 GB, free: 11.26 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004039/0.5307, allocations: 291.6 kB / 0.6541 GB, free: 11.06 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0008073/0.5315, allocations: 475.8 kB / 0.6545 GB, free: 10.77 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.316e-06/0.5315, allocations: 0.9062 kB / 0.6545 GB, free: 10.77 MB / 0.4981 GB Notification: Performance of matching and sorting (n=55) (initialization): time 0.001848/0.5334, allocations: 0.7411 MB / 0.6552 GB, free: 10.46 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 8.346e-05/0.5335, allocations: 182.8 kB / 0.6554 GB, free: 10.24 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.011e-05/0.5335, allocations: 5.453 kB / 0.6554 GB, free: 10.24 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001028/0.5345, allocations: 274.1 kB / 0.6557 GB, free: 10.16 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002944/0.5348, allocations: 70.25 kB / 0.6557 GB, free: 10.15 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.005878/0.5407, allocations: 4.341 MB / 0.66 GB, free: 6.648 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001218/0.542, allocations: 78.64 kB / 0.6601 GB, free: 6.637 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.875e-05/0.542, allocations: 24.27 kB / 0.6601 GB, free: 6.629 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 1.019e-05/0.542, allocations: 3.875 kB / 0.6601 GB, free: 6.629 MB / 0.4981 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.00172/0.5438, allocations: 0.6587 MB / 0.6607 GB, free: 6.371 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.183e-06/0.5438, allocations: 2.781 kB / 0.6607 GB, free: 6.371 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009925/0.5448, allocations: 281.7 kB / 0.661 GB, free: 6.289 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002752/0.5451, allocations: 68.45 kB / 0.6611 GB, free: 6.281 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00564/0.5507, allocations: 4.335 MB / 0.6653 GB, free: 2.773 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001265/0.552, allocations: 85.8 kB / 0.6654 GB, free: 2.754 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.791e-05/0.5521, allocations: 20.8 kB / 0.6654 GB, free: 2.75 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 14 * 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 (39): * Single equations (assignments): 37 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * 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): 2 systems {(2,8), (2,6)} Notification: Performance of prepare postOptimizeDAE: time 0.0003921/0.5525, allocations: 286.7 kB / 0.6657 GB, free: 2.504 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000132/0.5526, allocations: 57.47 kB / 0.6657 GB, free: 2.477 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00184/0.5545, allocations: 0.6727 MB / 0.6664 GB, free: 2.188 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.001e-06/0.5545, allocations: 7.75 kB / 0.6664 GB, free: 2.184 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.607e-06/0.5545, allocations: 1.875 kB / 0.6664 GB, free: 2.184 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001569/0.5561, allocations: 0.7523 MB / 0.6671 GB, free: 1.723 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003317/0.5594, allocations: 1.695 MB / 0.6688 GB, free: 0.8047 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.468e-06/0.5594, allocations: 0 / 0.6688 GB, free: 0.8047 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002402/0.5597, allocations: 56.94 kB / 0.6688 GB, free: 0.7969 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0009858/0.5607, allocations: 248.8 kB / 0.6691 GB, free: 0.7227 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.508e-05/0.5607, allocations: 11.73 kB / 0.6691 GB, free: 0.7188 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005727/0.5664, allocations: 3.959 MB / 0.6729 GB, free: 13.43 MB / 0.5137 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.444e-06/0.5665, allocations: 1.5 kB / 0.6729 GB, free: 13.43 MB / 0.5137 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002416/0.5689, allocations: 0.9495 MB / 0.6739 GB, free: 12.95 MB / 0.5137 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003624/0.5693, allocations: 192.1 kB / 0.6741 GB, free: 12.79 MB / 0.5137 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 8.15e-05/0.5694, allocations: 9.5 kB / 0.6741 GB, free: 12.79 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001068/0.5704, allocations: 79.55 kB / 0.6741 GB, free: 12.77 MB / 0.5137 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001381/0.5706, allocations: 34.14 kB / 0.6742 GB, free: 12.76 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.734e-05/0.5706, allocations: 11.56 kB / 0.6742 GB, free: 12.76 MB / 0.5137 GB Notification: Performance of sorting global known variables: time 0.0006973/0.5713, allocations: 377 kB / 0.6745 GB, free: 12.59 MB / 0.5137 GB Notification: Performance of sort global known variables: time 1.41e-07/0.5713, allocations: 0 / 0.6745 GB, free: 12.59 MB / 0.5137 GB Notification: Performance of remove unused functions: time 0.001806/0.5732, allocations: 416.4 kB / 0.6749 GB, free: 12.54 MB / 0.5137 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 2 (vol.ports[1].h_outflow,vol1.ports[1].h_outflow) * 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 (28): * Single equations (assignments): 26 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * 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): 2 systems {(2,6), (2,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.000662/0.5738, allocations: 292.7 kB / 0.6752 GB, free: 12.39 MB / 0.5137 GB Notification: Performance of simCode: created initialization part: time 0.003442/0.5773, allocations: 1.357 MB / 0.6765 GB, free: 11.61 MB / 0.5137 GB Notification: Performance of simCode: created event and clocks part: time 4.308e-06/0.5773, allocations: 1.312 kB / 0.6765 GB, free: 11.61 MB / 0.5137 GB Notification: Performance of simCode: created simulation system equations: time 0.001396/0.5787, allocations: 0.5478 MB / 0.6771 GB, free: 11.26 MB / 0.5137 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002135/0.5809, allocations: 354.2 kB / 0.6774 GB, free: 11.18 MB / 0.5137 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002725/0.5836, allocations: 1.547 MB / 0.6789 GB, free: 10.2 MB / 0.5137 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006584/0.5843, allocations: 0.9211 MB / 0.6798 GB, free: 9.473 MB / 0.5137 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002006/0.5845, allocations: 55.64 kB / 0.6799 GB, free: 9.461 MB / 0.5137 GB Notification: Performance of SimCode: time 2.304e-06/0.5845, allocations: 0 / 0.6799 GB, free: 9.461 MB / 0.5137 GB Notification: Performance of Templates: time 0.02772/0.6122, allocations: 17.2 MB / 0.6967 GB, free: 3.516 MB / 0.5137 GB make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.makefile (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.pipe 2>&1)