Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.001164/0.001164, allocations: 79.69 kB / 19.25 MB, free: 0.6133 MB / 13.93 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.001515/0.001515, allocations: 166 kB / 22.56 MB, free: 1.953 MB / 18.57 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 0.8723/0.8723, allocations: 177.1 MB / 202.9 MB, free: 5.707 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/package.mo", uses=false) [Timeout 180] "[/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/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 3.7.0/package.mo): time 0.5377/0.5377, allocations: 110.2 MB / 369.6 MB, free: 12.59 MB / 346.7 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:44:3-56:20:writable] Warning: External function annotation should occur on the external-clause, not on the function. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:58:3-65:19:writable] Warning: External function annotation should occur on the external-clause, not on the function. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:67:3-72:20:writable] Warning: External function annotation should occur on the external-clause, not on the function. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/BoundaryConditions/Scenarios/CombiTimeTable.mo:74:3-79:20:writable] Warning: External function annotation should occur on the external-clause, not on the function. " [Timeout remaining time 179] Using package BuildSysPro with version 3.6.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.7.0/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: "" <> buildModelFMU(BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones,fileNamePrefix="BuildSysPro_BuildSysPro_IBPSA_Airflow_Multizone_Examples_ReverseBuoyancy3Zones",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones,fileNamePrefix="BuildSysPro_BuildSysPro_IBPSA_Airflow_Multizone_Examples_ReverseBuoyancy3Zones",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.693e-06/1.693e-06, allocations: 0 / 0.5475 GB, free: 8.688 MB / 474.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 2.017e-05/2.186e-05, allocations: 6.938 kB / 0.5475 GB, free: 8.68 MB / 474.7 MB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones): time 0.4956/0.4956, allocations: 262.5 MB / 0.8038 GB, free: 7.59 MB / 0.6355 GB Notification: Performance of NFInst.instExpressions: time 0.01994/0.5156, allocations: 15.95 MB / 0.8194 GB, free: 7.605 MB / 0.6511 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002663/0.5182, allocations: 103.2 kB / 0.8195 GB, free: 7.504 MB / 0.6511 GB Notification: Performance of NFTyping.typeComponents: time 0.004566/0.5228, allocations: 1.809 MB / 0.8213 GB, free: 5.684 MB / 0.6511 GB Notification: Performance of NFTyping.typeBindings: time 0.01347/0.5363, allocations: 6.887 MB / 0.828 GB, free: 14.76 MB / 0.6667 GB Notification: Performance of NFTyping.typeClassSections: time 0.006594/0.5428, allocations: 3.06 MB / 0.831 GB, free: 11.69 MB / 0.6667 GB Notification: Performance of NFFlatten.flatten: time 0.008957/0.5518, allocations: 7.963 MB / 0.8388 GB, free: 3.707 MB / 0.6667 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003611/0.5554, allocations: 1.951 MB / 0.8407 GB, free: 1.699 MB / 0.6667 GB Notification: Performance of NFEvalConstants.evaluate: time 0.006788/0.5622, allocations: 3.842 MB / 0.8444 GB, free: 13.85 MB / 0.6823 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004764/0.567, allocations: 2.562 MB / 0.8469 GB, free: 11.3 MB / 0.6823 GB Notification: Performance of NFPackage.collectConstants: time 0.0008648/0.5678, allocations: 331.9 kB / 0.8472 GB, free: 10.97 MB / 0.6823 GB Notification: Performance of NFFlatten.collectFunctions: time 0.009942/0.5778, allocations: 5.147 MB / 0.8523 GB, free: 5.809 MB / 0.6823 GB Notification: Performance of NFScalarize.scalarize: time 0.001975/0.5797, allocations: 1.453 MB / 0.8537 GB, free: 4.352 MB / 0.6823 GB Notification: Performance of NFVerifyModel.verify: time 0.002865/0.5826, allocations: 1.364 MB / 0.855 GB, free: 2.984 MB / 0.6823 GB Notification: Performance of NFConvertDAE.convert: time 0.01329/0.5959, allocations: 7.195 MB / 0.8621 GB, free: 11.77 MB / 0.698 GB Notification: Performance of FrontEnd - DAE generated: time 7.144e-06/0.5959, allocations: 0 / 0.8621 GB, free: 11.77 MB / 0.698 GB Notification: Performance of FrontEnd: time 1.924e-06/0.5959, allocations: 0 / 0.8621 GB, free: 11.77 MB / 0.698 GB Notification: Performance of Transformations before backend: time 0.0001588/0.5961, allocations: 7.938 kB / 0.8621 GB, free: 11.76 MB / 0.698 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 669 * Number of variables: 669 Notification: Performance of Generate backend data structure: time 0.008716/0.6048, allocations: 4.128 MB / 0.8661 GB, free: 7.578 MB / 0.698 GB Notification: Performance of prepare preOptimizeDAE: time 5.141e-05/0.6048, allocations: 8.031 kB / 0.8661 GB, free: 7.57 MB / 0.698 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0004265/0.6053, allocations: 371 kB / 0.8665 GB, free: 7.199 MB / 0.698 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.004149/0.6094, allocations: 0.9384 MB / 0.8674 GB, free: 6.258 MB / 0.698 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003684/0.6131, allocations: 1.94 MB / 0.8693 GB, free: 4.273 MB / 0.698 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001257/0.6132, allocations: 193.1 kB / 0.8694 GB, free: 4.082 MB / 0.698 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0005217/0.6137, allocations: 260 kB / 0.8697 GB, free: 3.828 MB / 0.698 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.005257/0.619, allocations: 3.74 MB / 0.8733 GB, free: 15.88 MB / 0.7136 GB Notification: Performance of preOpt findStateOrder (simulation): time 5.417e-05/0.6191, allocations: 4 kB / 0.8733 GB, free: 15.88 MB / 0.7136 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002104/0.6193, allocations: 112 kB / 0.8735 GB, free: 15.77 MB / 0.7136 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001078/0.6194, allocations: 140.9 kB / 0.8736 GB, free: 15.63 MB / 0.7136 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.004759/0.6241, allocations: 3.467 MB / 0.877 GB, free: 12.15 MB / 0.7136 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 0.01245/0.6366, allocations: 8.252 MB / 0.885 GB, free: 3.75 MB / 0.7136 GB Notification: Performance of preOpt comSubExp (simulation): time 0.003191/0.6398, allocations: 2.944 MB / 0.8879 GB, free: 0.8242 MB / 0.7136 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001899/0.6417, allocations: 1.697 MB / 0.8896 GB, free: 15.12 MB / 0.7292 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005393/0.6422, allocations: 226 kB / 0.8898 GB, free: 14.9 MB / 0.7292 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.964e-05/0.6423, allocations: 64.75 kB / 0.8898 GB, free: 14.82 MB / 0.7292 GB Notification: Performance of pre-optimization done (n=278): time 4.037e-06/0.6423, allocations: 0 / 0.8898 GB, free: 14.82 MB / 0.7292 GB Notification: Performance of matching and sorting (n=278): time 0.005238/0.6475, allocations: 3.89 MB / 0.8936 GB, free: 10.89 MB / 0.7292 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.303e-05/0.6476, allocations: 89.53 kB / 0.8937 GB, free: 10.79 MB / 0.7292 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001691/0.6493, allocations: 1.387 MB / 0.8951 GB, free: 9.391 MB / 0.7292 GB Notification: Performance of collectPreVariables (initialization): time 0.0002484/0.6495, allocations: 77.69 kB / 0.8952 GB, free: 9.309 MB / 0.7292 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005669/0.6501, allocations: 0.9941 MB / 0.8961 GB, free: 8.305 MB / 0.7292 GB Notification: Performance of collectInitialBindings (initialization): time 0.000782/0.6509, allocations: 0.9875 MB / 0.8971 GB, free: 7.309 MB / 0.7292 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000434/0.6513, allocations: 405 kB / 0.8975 GB, free: 6.906 MB / 0.7292 GB Notification: Performance of setup shared object (initialization): time 8.317e-05/0.6514, allocations: 305.1 kB / 0.8978 GB, free: 6.605 MB / 0.7292 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001692/0.6531, allocations: 1.098 MB / 0.8988 GB, free: 5.504 MB / 0.7292 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001423/0.6545, allocations: 1.355 MB / 0.9002 GB, free: 4.082 MB / 0.7292 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.002961/0.6574, allocations: 2.646 MB / 0.9027 GB, free: 1.344 MB / 0.7292 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.365e-05/0.6575, allocations: 0 / 0.9027 GB, free: 1.344 MB / 0.7292 GB Notification: Performance of matching and sorting (n=311) (initialization): time 0.00416/0.6616, allocations: 2.994 MB / 0.9057 GB, free: 14.3 MB / 0.7448 GB Notification: Performance of prepare postOptimizeDAE: time 3.268e-05/0.6617, allocations: 4 kB / 0.9057 GB, free: 14.3 MB / 0.7448 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.661e-05/0.6617, allocations: 4 kB / 0.9057 GB, free: 14.3 MB / 0.7448 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.755e-05/0.6617, allocations: 16 kB / 0.9057 GB, free: 14.28 MB / 0.7448 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001334/0.663, allocations: 0.511 MB / 0.9062 GB, free: 13.77 MB / 0.7448 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.769e-05/0.6631, allocations: 24.33 kB / 0.9062 GB, free: 13.75 MB / 0.7448 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001573/0.6646, allocations: 190.5 kB / 0.9064 GB, free: 13.56 MB / 0.7448 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001525/0.6648, allocations: 83.98 kB / 0.9065 GB, free: 13.48 MB / 0.7448 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 19 * 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 (311): * Single equations (assignments): 311 * 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 0.001268/0.6661, allocations: 0.6416 MB / 0.9071 GB, free: 12.82 MB / 0.7448 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006206/0.6667, allocations: 238.5 kB / 0.9073 GB, free: 12.59 MB / 0.7448 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004032/0.6707, allocations: 3.116 MB / 0.9104 GB, free: 9.418 MB / 0.7448 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.297e-05/0.6707, allocations: 28 kB / 0.9104 GB, free: 9.391 MB / 0.7448 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.166e-05/0.6707, allocations: 0 / 0.9104 GB, free: 9.391 MB / 0.7448 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003417/0.6742, allocations: 2.657 MB / 0.913 GB, free: 6.66 MB / 0.7448 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00788/0.682, allocations: 5.73 MB / 0.9186 GB, free: 0.8359 MB / 0.7448 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.311e-06/0.682, allocations: 0 / 0.9186 GB, free: 0.8359 MB / 0.7448 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001746/0.6838, allocations: 0.5461 MB / 0.9191 GB, free: 296 kB / 0.7448 GB Notification: Performance of postOpt tearingSystem (simulation): time 2.686e-05/0.6838, allocations: 15.31 kB / 0.9191 GB, free: 284 kB / 0.7448 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001445/0.684, allocations: 63.98 kB / 0.9192 GB, free: 220 kB / 0.7448 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.039e-05/0.684, allocations: 8 kB / 0.9192 GB, free: 212 kB / 0.7448 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.164e-06/0.684, allocations: 4 kB / 0.9192 GB, free: 208 kB / 0.7448 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005415/0.6894, allocations: 4.571 MB / 0.9237 GB, free: 11.55 MB / 0.7605 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001298/0.6907, allocations: 0.5601 MB / 0.9242 GB, free: 10.99 MB / 0.7605 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002991/0.691, allocations: 55.98 kB / 0.9243 GB, free: 10.93 MB / 0.7605 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009749/0.692, allocations: 62.8 kB / 0.9243 GB, free: 10.88 MB / 0.7605 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002478/0.6922, allocations: 169.8 kB / 0.9245 GB, free: 10.71 MB / 0.7605 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001151/0.6923, allocations: 83.97 kB / 0.9246 GB, free: 10.62 MB / 0.7605 GB Notification: Performance of sorting global known variables: time 0.001081/0.6934, allocations: 0.9423 MB / 0.9255 GB, free: 9.688 MB / 0.7605 GB Notification: Performance of sort global known variables: time 2e-07/0.6934, allocations: 7.938 kB / 0.9255 GB, free: 9.68 MB / 0.7605 GB Notification: Performance of remove unused functions: time 0.002433/0.6958, allocations: 0.9867 MB / 0.9265 GB, free: 8.691 MB / 0.7605 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 18 (volEas.dynBal.medium.Xi[1],volEas.dynBal.U,volEas.dynBal.m,oriOutBot.mExc,oriOutTop.mExc,volOut.dynBal.medium.Xi[1],volOut.dynBal.U,volOut.dynBal.m,oriWesTop.mExc,dooOpeClo.mExcAB,dooOpeClo.mExcBA,oriEasTop.mExc,volTop.dynBal.medium.Xi[1],volTop.dynBal.U,volTop.dynBal.m,volWes.dynBal.medium.Xi[1],volWes.dynBal.U,volWes.dynBal.m) * 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 (278): * Single equations (assignments): 278 * 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 Backend phase and start with SimCode phase: time 0.005774/0.7016, allocations: 5.422 MB / 0.9318 GB, free: 3.188 MB / 0.7605 GB Notification: Performance of simCode: created initialization part: time 0.003791/0.7054, allocations: 2.614 MB / 0.9343 GB, free: 0.543 MB / 0.7605 GB Notification: Performance of simCode: created event and clocks part: time 5.41e-06/0.7054, allocations: 3.938 kB / 0.9343 GB, free: 0.5391 MB / 0.7605 GB Notification: Performance of simCode: created simulation system equations: time 0.2371/0.9426, allocations: 1.394 MB / 0.9357 GB, free: 306.8 MB / 0.7605 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00454/0.9471, allocations: 1.349 MB / 0.937 GB, free: 306.7 MB / 0.7605 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0275/0.9746, allocations: 19.24 MB / 0.9558 GB, free: 298.6 MB / 0.7605 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001461/0.9761, allocations: 1.343 MB / 0.9571 GB, free: 298.3 MB / 0.7605 GB Notification: Performance of simCode: alias equations: time 0.002645/0.9787, allocations: 0.8394 MB / 0.9579 GB, free: 298.2 MB / 0.7605 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001254/0.98, allocations: 1.09 MB / 0.959 GB, free: 297.3 MB / 0.7605 GB Notification: Performance of SimCode: time 1.933e-06/0.98, allocations: 0 / 0.959 GB, free: 297.3 MB / 0.7605 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.07576/1.056, allocations: 74.27 MB / 1.032 GB, free: 230.9 MB / 0.7605 GB Notification: Performance of buildModelFMU: Generate platform static: time 8.652/9.708, allocations: 4 kB / 1.032 GB, free: 230.9 MB / 0.7605 GB " [Timeout remaining time 650] (rm -f BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones.sim & python3 -m fmpy simulate --output-file BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones_res.csv --start-time 0 --stop-time 3600 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 1.44 BuildSysPro_BuildSysPro_IBPSA_Airflow_Multizone_Examples_ReverseBuoyancy3Zones.fmu > BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.ReverseBuoyancy3Zones.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 12.259630651213229] Failed to read output from testmodel.py, exit status != 0: 9.823282390832901 9.829650706 9.232147877 Calling exit ...