Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.HeatTransfer.Windows.Validation.WindowSteadyState.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.HeatTransfer.Windows.Validation.WindowSteadyState,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.HeatTransfer.Windows.Validation.WindowSteadyState") translateModel(Buildings.HeatTransfer.Windows.Validation.WindowSteadyState,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.HeatTransfer.Windows.Validation.WindowSteadyState") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001086/0.001086, allocations: 91.12 kB / 15.06 MB, free: 1.078 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001224/0.001224, allocations: 172.7 kB / 15.95 MB, free: 192 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.488/1.488, allocations: 205.4 MB / 222.1 MB, free: 5.645 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 1.566/1.566, allocations: 252 MB / 0.5102 GB, free: 4.789 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 0.0005301/0.0005301, allocations: 23.98 kB / 0.6243 GB, free: 1.117 MB / 0.5137 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.5685/0.569, allocations: 106.3 MB / 0.7281 GB, free: 11.43 MB / 0.545 GB Notification: Performance of NFInst.instantiate(Buildings.HeatTransfer.Windows.Validation.WindowSteadyState): time 0.01303/0.5821, allocations: 11.55 MB / 0.7394 GB, free: 15.84 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.1608/0.743, allocations: 144.9 MB / 0.8809 GB, free: 14.51 MB / 0.7012 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002893/0.7459, allocations: 63.62 kB / 0.881 GB, free: 14.45 MB / 0.7012 GB Notification: Performance of NFTyping.typeComponents: time 0.005869/0.7518, allocations: 2.011 MB / 0.8829 GB, free: 12.43 MB / 0.7012 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/BoundaryConditions/WeatherData/BaseClasses/getHeaderElementTMY3.mo:2:1-105:25:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘ contains a call to impure function ‘Modelica.Utilities.Streams.readLine‘. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/BoundaryConditions/WeatherData/BaseClasses/getLongitudeTMY3.mo:2:1-48:21:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getLongitudeTMY3‘ contains a call to impure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/BoundaryConditions/WeatherData/BaseClasses/getLatitudeTMY3.mo:2:1-48:20:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getLatitudeTMY3‘ contains a call to impure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/BoundaryConditions/WeatherData/BaseClasses/getTimeZoneTMY3.mo:2:1-47:20:writable] Warning: Pure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getTimeZoneTMY3‘ contains a call to impure function ‘Buildings.BoundaryConditions.WeatherData.BaseClasses.getHeaderElementTMY3‘. Notification: Performance of NFTyping.typeBindings: time 0.004673/0.7565, allocations: 1.383 MB / 0.8843 GB, free: 11.04 MB / 0.7012 GB Notification: Performance of NFTyping.typeClassSections: time 0.005031/0.7616, allocations: 1.695 MB / 0.8859 GB, free: 9.355 MB / 0.7012 GB Notification: Performance of NFFlatten.flatten: time 0.008479/0.77, allocations: 7.109 MB / 0.8929 GB, free: 2.234 MB / 0.7012 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002882/0.773, allocations: 1.583 MB / 0.8944 GB, free: 0.5977 MB / 0.7012 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003997/0.777, allocations: 2.058 MB / 0.8964 GB, free: 14.53 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.003645/0.7806, allocations: 2.027 MB / 0.8984 GB, free: 12.5 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0007163/0.7814, allocations: 163.9 kB / 0.8986 GB, free: 12.34 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00489/0.7863, allocations: 2.383 MB / 0.9009 GB, free: 9.949 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.003029/0.7893, allocations: 2.991 MB / 0.9038 GB, free: 6.953 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.001404/0.7908, allocations: 0.7767 MB / 0.9046 GB, free: 6.168 MB / 0.7169 GB Notification: Performance of NFConvertDAE.convert: time 0.4493/1.24, allocations: 6.157 MB / 0.9106 GB, free: 12.61 MB / 0.7169 GB Notification: Performance of FrontEnd - DAE generated: time 7.714e-06/1.24, allocations: 1.219 kB / 0.9106 GB, free: 12.61 MB / 0.7169 GB Notification: Performance of FrontEnd: time 2.274e-06/1.24, allocations: 0 / 0.9106 GB, free: 12.61 MB / 0.7169 GB Notification: Performance of Transformations before backend: time 0.0002215/1.24, allocations: 0 / 0.9106 GB, free: 12.61 MB / 0.7169 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 634 * Number of variables: 634 Notification: Performance of Generate backend data structure: time 0.014/1.254, allocations: 4.622 MB / 0.9151 GB, free: 10.57 MB / 0.7169 GB Notification: Performance of prepare preOptimizeDAE: time 5.543e-05/1.254, allocations: 9.25 kB / 0.9151 GB, free: 10.57 MB / 0.7169 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.02688/1.281, allocations: 4.382 MB / 0.9194 GB, free: 10.21 MB / 0.7169 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.03229/1.314, allocations: 11.54 MB / 0.9307 GB, free: 9.406 MB / 0.7169 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002925/1.314, allocations: 214.1 kB / 0.9309 GB, free: 9.398 MB / 0.7169 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001099/1.315, allocations: 281.6 kB / 0.9311 GB, free: 9.398 MB / 0.7169 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.009174/1.324, allocations: 4.284 MB / 0.9353 GB, free: 8.961 MB / 0.7169 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.876e-05/1.324, allocations: 6.281 kB / 0.9353 GB, free: 8.961 MB / 0.7169 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0003079/1.325, allocations: 104.4 kB / 0.9354 GB, free: 8.961 MB / 0.7169 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.512e-05/1.325, allocations: 63.84 kB / 0.9355 GB, free: 8.961 MB / 0.7169 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.008342/1.333, allocations: 3.875 MB / 0.9393 GB, free: 8.902 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 0.02708/1.36, allocations: 22.43 MB / 0.9612 GB, free: 1.828 MB / 0.7169 GB Notification: Performance of preOpt comSubExp (simulation): time 0.00621/1.366, allocations: 2.969 MB / 0.9641 GB, free: 1.758 MB / 0.7169 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.005108/1.372, allocations: 2.223 MB / 0.9663 GB, free: 1.715 MB / 0.7169 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003935/1.372, allocations: 428.9 kB / 0.9667 GB, free: 1.34 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.005354/1.377, allocations: 2.42 MB / 0.969 GB, free: 1.195 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=175): time 3.246e-06/1.377, allocations: 0 / 0.969 GB, free: 1.195 MB / 0.7169 GB Notification: Performance of matching and sorting (n=175): time 0.0393/1.417, allocations: 11.85 MB / 0.9806 GB, free: 13.64 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0003139/1.417, allocations: 472.8 kB / 0.9811 GB, free: 13.19 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01786/1.435, allocations: 13.11 MB / 0.9939 GB, free: 4.473 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 0.001045/1.436, allocations: 77.7 kB / 0.9939 GB, free: 4.426 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.002078/1.438, allocations: 1.656 MB / 0.9956 GB, free: 3.551 MB / 0.7325 GB Notification: Performance of collectInitialBindings (initialization): time 0.001073/1.439, allocations: 0.5891 MB / 0.9961 GB, free: 3.047 MB / 0.7325 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004453/1.44, allocations: 61.44 kB / 0.9962 GB, free: 3.031 MB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 0.0002592/1.44, allocations: 441.9 kB / 0.9966 GB, free: 2.641 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.01497/1.455, allocations: 8.982 MB / 1.005 GB, free: 12.03 MB / 0.7481 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.01617/1.471, allocations: 9.914 MB / 1.015 GB, free: 4.184 MB / 0.7481 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01506/1.486, allocations: 9.047 MB / 1.024 GB, free: 13.58 MB / 0.7637 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.816e-05/1.486, allocations: 8 kB / 1.024 GB, free: 13.57 MB / 0.7637 GB Notification: Performance of matching and sorting (n=384) (initialization): time 0.03836/1.525, allocations: 20.94 MB / 1.044 GB, free: 14.16 MB / 0.7794 GB Notification: Performance of prepare postOptimizeDAE: time 0.0007342/1.525, allocations: 0.9529 MB / 1.045 GB, free: 12.96 MB / 0.7794 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.03601/1.561, allocations: 11.48 MB / 1.056 GB, free: 4.441 MB / 0.7794 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.08125/1.643, allocations: 10.92 MB / 1.067 GB, free: 10.13 MB / 0.795 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.005966/1.649, allocations: 0.8803 MB / 1.068 GB, free: 9.312 MB / 0.795 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01176/1.661, allocations: 7.946 MB / 1.076 GB, free: 2.301 MB / 0.795 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.008251/1.669, allocations: 0.7406 MB / 1.077 GB, free: 1.609 MB / 0.795 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0009712/1.67, allocations: 204.1 kB / 1.077 GB, free: 1.438 MB / 0.795 GB Notification: Performance of prepare postOptimizeDAE: time 1.185e-05/1.67, allocations: 4 kB / 1.077 GB, free: 1.434 MB / 0.795 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.03494/1.705, allocations: 19.96 MB / 1.096 GB, free: 2.82 MB / 0.8106 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.02328/1.728, allocations: 10.49 MB / 1.106 GB, free: 10.25 MB / 0.8262 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.003578/1.732, allocations: 1.203 MB / 1.108 GB, free: 9.039 MB / 0.8262 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.006566/1.738, allocations: 0.9828 MB / 1.109 GB, free: 8.098 MB / 0.8262 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01599/1.754, allocations: 11.73 MB / 1.12 GB, free: 11.9 MB / 0.8419 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.007993/1.762, allocations: 0.6712 MB / 1.121 GB, free: 11.23 MB / 0.8419 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001173/1.764, allocations: 203.7 kB / 1.121 GB, free: 11.04 MB / 0.8419 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 112 * Number of states: 0 () * Number of discrete variables: 8 ($whenCondition2,$whenCondition1,$PRE.weaDat.conTimMin.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTim.tNext,weaDat.conTimMin.canRepeatWeatherFile,weaDat.conTim.canRepeatWeatherFile) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (301): * Single equations (assignments): 296 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(1,100.0%) 6} * Non-linear torn systems: 2 {1 2,12 49} Notification: Performance of prepare postOptimizeDAE: time 0.003719/1.767, allocations: 1.995 MB / 1.123 GB, free: 9.07 MB / 0.8419 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001113/1.769, allocations: 359.3 kB / 1.123 GB, free: 8.715 MB / 0.8419 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02003/1.789, allocations: 6.877 MB / 1.13 GB, free: 1.805 MB / 0.8419 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.334e-05/1.789, allocations: 16 kB / 1.13 GB, free: 1.789 MB / 0.8419 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.165e-05/1.789, allocations: 8 kB / 1.13 GB, free: 1.781 MB / 0.8419 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.52e-05/1.789, allocations: 7.969 kB / 1.13 GB, free: 1.773 MB / 0.8419 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02785/1.817, allocations: 11.69 MB / 1.141 GB, free: 5.922 MB / 0.8575 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 0.03536/1.852, allocations: 6.764 MB / 1.148 GB, free: 15.18 MB / 0.8731 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002455/1.854, allocations: 338.1 kB / 1.148 GB, free: 14.86 MB / 0.8731 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0976/1.952, allocations: 15.7 MB / 1.164 GB, free: 15.23 MB / 0.8887 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0006283/1.953, allocations: 71.94 kB / 1.164 GB, free: 15.16 MB / 0.8887 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0111/1.964, allocations: 7.987 MB / 1.171 GB, free: 6.766 MB / 0.8887 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5e-06/1.964, allocations: 4.031 kB / 1.171 GB, free: 6.762 MB / 0.8887 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.03658/2, allocations: 7.613 MB / 1.179 GB, free: 15.16 MB / 0.9044 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002816/2.003, allocations: 1.007 MB / 1.18 GB, free: 14.13 MB / 0.9044 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0006948/2.004, allocations: 36 kB / 1.18 GB, free: 14.09 MB / 0.9044 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00352/2.008, allocations: 335.2 kB / 1.18 GB, free: 13.77 MB / 0.9044 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002855/2.008, allocations: 125.8 kB / 1.18 GB, free: 13.65 MB / 0.9044 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002131/2.008, allocations: 79.94 kB / 1.18 GB, free: 13.57 MB / 0.9044 GB Notification: Performance of sorting global known variables: time 0.008404/2.016, allocations: 8.318 MB / 1.189 GB, free: 5.242 MB / 0.9044 GB Notification: Performance of sort global known variables: time 5.91e-07/2.017, allocations: 0 / 1.189 GB, free: 5.242 MB / 0.9044 GB Notification: Performance of remove unused functions: time 0.009121/2.026, allocations: 2.409 MB / 1.191 GB, free: 2.844 MB / 0.9044 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 6 * Number of states: 0 () * Number of discrete variables: 4 ($whenCondition2,$whenCondition1,weaDat.conTimMin.tNext,weaDat.conTim.tNext) * Number of discrete states: 2 (weaDat.conTimMin.tNext,weaDat.conTim.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (99): * Single equations (assignments): 92 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(1,100.0%) 6} * Non-linear torn systems: 2 {12 57,1 3} Notification: Performance of Backend phase and start with SimCode phase: time 0.002735/2.028, allocations: 0.9547 MB / 1.192 GB, free: 2.141 MB / 0.9044 GB Notification: Performance of simCode: created initialization part: time 0.03892/2.067, allocations: 23.35 MB / 1.215 GB, free: 10.88 MB / 0.9356 GB Notification: Performance of simCode: created event and clocks part: time 1.074e-05/2.067, allocations: 8.25 kB / 1.215 GB, free: 10.87 MB / 0.9356 GB Notification: Performance of simCode: created simulation system equations: time 0.007988/2.075, allocations: 3.172 MB / 1.218 GB, free: 7.688 MB / 0.9356 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004254/2.08, allocations: 0.7186 MB / 1.218 GB, free: 6.969 MB / 0.9356 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0244/2.104, allocations: 16.61 MB / 1.235 GB, free: 6.336 MB / 0.9512 GB [/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/SimCode/SimCodeUtil.mo:754:5-754:146:writable] Error: Internal error function createSimCode failed [Transformation from optimised DAE to simulation code structure failed]