Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo", uses=false) Using package ModelicaTest with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo) Using package Modelica with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo) Using package Complex with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo) Using package ModelicaServices with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo) Running command: translateModel(ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|volume.medium.h|volume.medium.p",fileNamePrefix="ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph") translateModel(ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|volume.medium.h|volume.medium.p",fileNamePrefix="ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo): time 0.001099/0.001099, allocations: 117.9 kB / 18.46 MB, free: 4.594 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo): time 0.001249/0.001249, allocations: 206.8 kB / 19.41 MB, free: 3.652 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo): time 1.402/1.402, allocations: 227.4 MB / 247.6 MB, free: 10.46 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo): time 0.2084/0.2084, allocations: 46.11 MB / 345 MB, free: 11.47 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001476/0.001477, allocations: 75.88 kB / 482 MB, free: 4.035 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.311/0.3125, allocations: 62.43 MB / 0.5317 GB, free: 13.59 MB / 398.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph): time 0.04864/0.3612, allocations: 39.19 MB / 0.5699 GB, free: 10.39 MB / 430.1 MB Notification: Performance of NFInst.instExpressions: time 0.02471/0.3859, allocations: 20.17 MB / 0.5896 GB, free: 6.164 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008335/0.3868, allocations: 27.81 kB / 0.5897 GB, free: 6.137 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 0.00134/0.3882, allocations: 441.3 kB / 0.5901 GB, free: 5.703 MB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 0.01409/0.4023, allocations: 5.119 MB / 0.5951 GB, free: 0.5859 MB / 446.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.006821/0.4091, allocations: 2.574 MB / 0.5976 GB, free: 14.01 MB / 462.1 MB Notification: Performance of NFFlatten.flatten: time 0.002805/0.412, allocations: 1.977 MB / 0.5995 GB, free: 12.02 MB / 462.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0009427/0.4129, allocations: 0.4897 MB / 0.6 GB, free: 11.52 MB / 462.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.009176/0.4221, allocations: 4.172 MB / 0.6041 GB, free: 7.289 MB / 462.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.01075/0.4329, allocations: 5.44 MB / 0.6094 GB, free: 1.766 MB / 462.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002924/0.4332, allocations: 72 kB / 0.6095 GB, free: 1.695 MB / 462.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.01583/0.449, allocations: 7.387 MB / 0.6167 GB, free: 10.3 MB / 478.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0005393/0.4496, allocations: 287.2 kB / 0.617 GB, free: 10.02 MB / 478.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0008609/0.4505, allocations: 458 kB / 0.6174 GB, free: 9.57 MB / 478.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01171/0.4622, allocations: 5.106 MB / 0.6224 GB, free: 4.453 MB / 478.1 MB Notification: Performance of FrontEnd - DAE generated: time 5.791e-06/0.4623, allocations: 0 / 0.6224 GB, free: 4.453 MB / 478.1 MB Notification: Performance of FrontEnd: time 1.803e-06/0.4623, allocations: 4 kB / 0.6224 GB, free: 4.449 MB / 478.1 MB Notification: Performance of Transformations before backend: time 3.711e-05/0.4623, allocations: 0 / 0.6224 GB, free: 4.449 MB / 478.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 160 * Number of variables: 160 Notification: Performance of Generate backend data structure: time 0.004946/0.4673, allocations: 1.691 MB / 0.624 GB, free: 2.707 MB / 478.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.532e-05/0.4673, allocations: 8.031 kB / 0.624 GB, free: 2.699 MB / 478.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002398/0.4698, allocations: 291.7 kB / 0.6243 GB, free: 2.414 MB / 478.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001148/0.4709, allocations: 0.5872 MB / 0.6249 GB, free: 1.785 MB / 478.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001445/0.4711, allocations: 121.2 kB / 0.625 GB, free: 1.652 MB / 478.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001429/0.4712, allocations: 60.12 kB / 0.6251 GB, free: 1.594 MB / 478.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00281/0.4741, allocations: 1.193 MB / 0.6262 GB, free: 308 kB / 478.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.744e-05/0.4741, allocations: 7.875 kB / 0.6262 GB, free: 300 kB / 478.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.419e-05/0.4742, allocations: 31.98 kB / 0.6263 GB, free: 268 kB / 478.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.95e-05/0.4743, allocations: 41.3 kB / 0.6263 GB, free: 228 kB / 478.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002728/0.477, allocations: 1.027 MB / 0.6273 GB, free: 15.19 MB / 494.1 MB 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 0.006826/0.4838, allocations: 5.615 MB / 0.6328 GB, free: 9.207 MB / 494.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.002463/0.4863, allocations: 0.762 MB / 0.6335 GB, free: 8.43 MB / 494.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0005948/0.4869, allocations: 285.2 kB / 0.6338 GB, free: 8.148 MB / 494.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.03493/0.5219, allocations: 17.36 MB / 0.6508 GB, free: 4.625 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.804e-05/0.522, allocations: 42.5 kB / 0.6508 GB, free: 4.574 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=45): time 3.046e-06/0.522, allocations: 0 / 0.6508 GB, free: 4.574 MB / 0.4981 GB Notification: Performance of matching and sorting (n=49): time 0.007511/0.5295, allocations: 2.281 MB / 0.653 GB, free: 2.238 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 8.841e-05/0.5296, allocations: 166.7 kB / 0.6532 GB, free: 2.035 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009123/0.5305, allocations: 0.6093 MB / 0.6538 GB, free: 1.414 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 6.419e-05/0.5306, allocations: 37.7 kB / 0.6538 GB, free: 1.371 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.000314/0.5309, allocations: 383.2 kB / 0.6542 GB, free: 0.9922 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001649/0.5311, allocations: 177.6 kB / 0.6544 GB, free: 0.8164 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000269/0.5314, allocations: 162.4 kB / 0.6545 GB, free: 0.6523 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 0.0001652/0.5316, allocations: 374.8 kB / 0.6549 GB, free: 284 kB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006638/0.5322, allocations: 285.9 kB / 0.6551 GB, free: 15.99 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009088/0.5332, allocations: 0.6082 MB / 0.6557 GB, free: 15.24 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001516/0.5347, allocations: 0.8909 MB / 0.6566 GB, free: 14.2 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.706e-06/0.5347, allocations: 4 kB / 0.6566 GB, free: 14.2 MB / 0.5137 GB Notification: Performance of matching and sorting (n=96) (initialization): time 0.001969/0.5367, allocations: 0.9688 MB / 0.6576 GB, free: 13.22 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 2.485e-05/0.5367, allocations: 14.66 kB / 0.6576 GB, free: 13.21 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.628e-05/0.5367, allocations: 12 kB / 0.6576 GB, free: 13.2 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002908/0.537, allocations: 64.83 kB / 0.6576 GB, free: 13.13 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001282/0.5383, allocations: 307.6 kB / 0.6579 GB, free: 12.83 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00163/0.54, allocations: 2.07 MB / 0.66 GB, free: 10.59 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000598/0.5406, allocations: 43.97 kB / 0.66 GB, free: 10.55 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.507e-05/0.5407, allocations: 40 kB / 0.66 GB, free: 10.51 MB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 47 * Number of states: 0 () * Number of discrete variables: 10 (ambient.medium.phase,fixedMassFlowRate.medium.phase,volume.heatTransfer.states[1].phase,volume.regularFlow[1],volume.regularFlow[2],volume.inFlow[2],volume.inFlow[1],shortPipe.flowModel.states[2].phase,shortPipe.flowModel.states[1].phase,ambient.state.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (95): * Single equations (assignments): 93 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * 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): 1 system {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 {(1,1)} Notification: Performance of prepare postOptimizeDAE: time 0.0004041/0.5411, allocations: 277.6 kB / 0.6603 GB, free: 10.23 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001854/0.5413, allocations: 75.09 kB / 0.6604 GB, free: 10.16 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003243/0.5445, allocations: 2.547 MB / 0.6629 GB, free: 7.598 MB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.057e-05/0.5445, allocations: 3.984 kB / 0.6629 GB, free: 7.594 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.256e-06/0.5446, allocations: 3.938 kB / 0.6629 GB, free: 7.59 MB / 0.5137 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003335/0.5449, allocations: 255.2 kB / 0.6631 GB, free: 7.32 MB / 0.5137 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001538/0.5451, allocations: 35.72 kB / 0.6631 GB, free: 7.285 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005922/0.5456, allocations: 55.94 kB / 0.6632 GB, free: 7.23 MB / 0.5137 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001185/0.5458, allocations: 40.5 kB / 0.6632 GB, free: 7.191 MB / 0.5137 GB Notification: Performance of postOpt createDAEmodeBDAE (simulation): time 0.002891/0.5487, allocations: 1.634 MB / 0.6648 GB, free: 5.543 MB / 0.5137 GB Notification: Performance of postOpt symbolicJacobianDAE (simulation): time 0.003046/0.5517, allocations: 2.246 MB / 0.667 GB, free: 3.273 MB / 0.5137 GB Notification: Performance of postOpt setEvaluationStage (simulation): time 0.0008643/0.5526, allocations: 0.6618 MB / 0.6677 GB, free: 2.613 MB / 0.5137 GB Notification: Performance of sorting global known variables: time 0.0007955/0.5534, allocations: 0.5615 MB / 0.6682 GB, free: 2.051 MB / 0.5137 GB Notification: Performance of Backend: time 4.7e-07/0.5534, allocations: 0 / 0.6682 GB, free: 2.051 MB / 0.5137 GB Notification: Performance of simCode: created initialization part: time 0.00856/0.562, allocations: 2.139 MB / 0.6703 GB, free: 15.91 MB / 0.5294 GB Notification: Performance of SimCode: time 0.003927/0.5659, allocations: 2.53 MB / 0.6728 GB, free: 13.34 MB / 0.5294 GB Notification: Performance of Templates: time 0.2864/0.8524, allocations: 52.41 MB / 0.724 GB, free: 174.4 MB / 0.5606 GB make -j1 -f ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.makefile (rm -f ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.pipe ; mkfifo ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.pipe ; head -c 1048576 < ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.pipe >> ../files/ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.sim & ./ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.pipe 2>&1) diffSimulationResults("ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v4.0.0/ModelicaTest/Media/TestsWithFluid/MediaTestModels/Water/WaterIF97_ph/WaterIF97_ph.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ModelicaTest_trunk_ModelicaTest.Media.TestsWithFluid.MediaTestModels.Water.WaterIF97_ph.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) "" Variables in the reference:time,volume.medium.h,volume.medium.p Variables in the result:$cse1.R_s,$cse1.T,$cse1.cp,$cse1.cv,$cse1.dpT,$cse1.h,$cse1.p,$cse1.pd,$cse1.phase,$cse1.pt,$cse1.region,$cse1.rho,$cse1.s,$cse1.vp,$cse1.vt,$cse1.x,$cse10.R_s,$cse10.T,$cse10.cp,$cse10.cv,$cse10.d,$cse10.dpT,$cse10.h,$cse10.pd,$cse10.pt,$cse10.region3boundary,$cse10.s,$cse10.vp,$cse10.vt,$cse12.R_s,$cse12.T,$cse12.cp,$cse12.cv,$cse12.dpT,$cse12.h,$cse12.p,$cse12.pd,$cse12.phase,$cse12.pt,$cse12.region,$cse12.rho,$cse12.s,$cse12.vp,$cse12.vt,$cse12.x,$cse9.R_s,$cse9.T,$cse9.cp,$cse9.cv,$cse9.d,$cse9.dpT,$cse9.h,$cse9.pd,$cse9.pt,$cse9.region3boundary,$cse9.s,$cse9.vp,$cse9.vt,T_start,X_start[1],ambient.T,ambient.X[1],ambient.d,ambient.flowDirection,ambient.h,ambient.medium.p,ambient.medium.preferredMediumStates,ambient.medium.sat.psat,ambient.medium.standardOrderComponents,ambient.medium.state.p,ambient.nPorts,ambient.p,ambient.ports[1].p,ambient.state.T,ambient.state.p,ambient.use_T,ambient.use_p,fixedMassFlowRate.T,fixedMassFlowRate.T_in_internal,fixedMassFlowRate.X[1],fixedMassFlowRate.X_in_internal[1],fixedMassFlowRate.flowDirection,fixedMassFlowRate.m_flow,fixedMassFlowRate.m_flow_in_internal,fixedMassFlowRate.medium.preferredMediumStates,fixedMassFlowRate.medium.standardOrderComponents,fixedMassFlowRate.nPorts,fixedMassFlowRate.ports[1].m_flow,h_start,p_start,shortPipe.V,shortPipe.allowFlowReversal,shortPipe.crossArea,shortPipe.diameter,shortPipe.flowModel.Re_turbulent,shortPipe.flowModel.allowFlowReversal,shortPipe.flowModel.crossAreas[1],shortPipe.flowModel.crossAreas[2],shortPipe.flowModel.dheights[1],shortPipe.flowModel.dp_nominal,shortPipe.flowModel.g,shortPipe.flowModel.m,shortPipe.flowModel.m_flow_nominal,shortPipe.flowModel.m_flow_start,shortPipe.flowModel.momentumDynamics,shortPipe.flowModel.mu_nominal,shortPipe.flowModel.mus[1],shortPipe.flowModel.mus[2],shortPipe.flowModel.mus_act[1],shortPipe.flowModel.n,shortPipe.flowModel.nParallel,shortPipe.flowModel.p_a_start,shortPipe.flowModel.p_b_start,shortPipe.flowModel.pathLengths[1],shortPipe.flowModel.rho_nominal,shortPipe.flowModel.roughnesses[1],shortPipe.flowModel.roughnesses[2],shortPipe.flowModel.show_Res,shortPipe.flowModel.states[2].p,shortPipe.flowModel.useUpstreamScheme,shortPipe.flowModel.use_Ib_flows,shortPipe.flowModel.use_mu_nominal,shortPipe.flowModel.use_rho_nominal,shortPipe.height_ab,shortPipe.isCircular,shortPipe.length,shortPipe.m_flow_start,shortPipe.nParallel,shortPipe.p_a_start,shortPipe.p_b_start,shortPipe.perimeter,shortPipe.port_a_exposesState,shortPipe.port_b.p,shortPipe.port_b_exposesState,shortPipe.roughness,shortPipe.showDesignFlowDirection,system.T_ambient,system.T_start,system.allowFlowReversal,system.dp_small,system.energyDynamics,system.eps_m_flow,system.g,system.m_flow_nominal,system.m_flow_small,system.m_flow_start,system.massDynamics,system.momentumDynamics,system.p_ambient,system.p_start,system.substanceDynamics,system.traceDynamics,system.use_eps_Re,time,volume.T_start,volume.V,volume.X_start[1],volume.energyDynamics,volume.fluidLevel_max,volume.fluidVolume,volume.h_start,volume.heatTransfer.T_ambient,volume.heatTransfer.k,volume.heatTransfer.n,volume.heatTransfer.use_k,volume.initialize_p,volume.m_flow_nominal,volume.m_flow_small,volume.massDynamics,volume.medium.h,volume.medium.p,volume.medium.preferredMediumStates,volume.medium.standardOrderComponents,volume.nPorts,volume.p_start,volume.ports[1].m_flow,volume.substanceDynamics,volume.traceDynamics,volume.use_HeatTransfer,volume.use_Re,volume.use_T_start,volume.use_portsData,volume.vesselArea