Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr AES_AES.Coursework.ElecSys_generator_models.BoilerFollows.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 0.001424/0.001424, allocations: 110.4 kB / 18.94 MB, free: 2.812 MB / 14.72 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 0.00191/0.00191, allocations: 218.7 kB / 22.25 MB, free: 5.184 MB / 14.72 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 1.522/1.522, allocations: 230.6 MB / 256 MB, free: 8.016 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo): time 0.1042/0.1042, allocations: 24.13 MB / 336.6 MB, free: 11.46 MB / 270.1 MB " [Timeout remaining time 180] Using package AES with version (/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/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(AES.Coursework.ElecSys_generator_models.BoilerFollows,fileNamePrefix="AES_AES_Coursework_ElecSys_generator_models_BoilerFollows",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(AES.Coursework.ElecSys_generator_models.BoilerFollows,fileNamePrefix="AES_AES_Coursework_ElecSys_generator_models_BoilerFollows",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: AES requested package Modelica of version 4.0.0. Modelica 4.1.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002014/0.002014, allocations: 67.88 kB / 473.3 MB, free: 6.441 MB / 334.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3731/0.3751, allocations: 59.61 MB / 0.5204 GB, free: 10.15 MB / 382.1 MB Notification: Performance of NFInst.instantiate(AES.Coursework.ElecSys_generator_models.BoilerFollows): time 0.003806/0.3789, allocations: 3.039 MB / 0.5234 GB, free: 7.988 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.001684/0.3806, allocations: 1.084 MB / 0.5244 GB, free: 7.207 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002513/0.3809, allocations: 24.56 kB / 0.5245 GB, free: 7.195 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0002331/0.3811, allocations: 83.39 kB / 0.5245 GB, free: 7.133 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.000181/0.3813, allocations: 87.69 kB / 0.5246 GB, free: 7.062 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0007572/0.382, allocations: 333.4 kB / 0.5249 GB, free: 6.871 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.0005728/0.3826, allocations: 0.5509 MB / 0.5255 GB, free: 6.582 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0003042/0.3829, allocations: 177.2 kB / 0.5257 GB, free: 6.473 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0002117/0.3831, allocations: 195 kB / 0.5258 GB, free: 6.367 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0002199/0.3834, allocations: 208.9 kB / 0.526 GB, free: 6.238 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 6.66e-05/0.3834, allocations: 46.88 kB / 0.5261 GB, free: 6.238 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 6.006e-05/0.3835, allocations: 45.44 kB / 0.5261 GB, free: 6.238 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 7.5e-05/0.3836, allocations: 104.2 kB / 0.5262 GB, free: 6.164 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.000141/0.3837, allocations: 228.7 kB / 0.5264 GB, free: 5.996 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0005522/0.3843, allocations: 0.5545 MB / 0.527 GB, free: 5.723 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 4.879e-06/0.3843, allocations: 0.6094 kB / 0.527 GB, free: 5.723 MB / 382.1 MB Notification: Performance of FrontEnd: time 1.162e-06/0.3843, allocations: 1.062 kB / 0.527 GB, free: 5.723 MB / 382.1 MB Notification: Performance of Transformations before backend: time 8.947e-06/0.3843, allocations: 4 kB / 0.527 GB, free: 5.719 MB / 382.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 88 * Number of variables: 88 Notification: Performance of Generate backend data structure: time 0.001056/0.3853, allocations: 0.7547 MB / 0.5277 GB, free: 5.168 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.006e-05/0.3854, allocations: 11.27 kB / 0.5277 GB, free: 5.168 MB / 382.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 6.938e-05/0.3854, allocations: 75.56 kB / 0.5278 GB, free: 5.105 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 8.68e-05/0.3855, allocations: 62.72 kB / 0.5279 GB, free: 5.074 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0005748/0.3861, allocations: 370.6 kB / 0.5282 GB, free: 4.812 MB / 382.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.091e-05/0.3861, allocations: 28.59 kB / 0.5283 GB, free: 4.797 MB / 382.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 5.49e-05/0.3862, allocations: 36.31 kB / 0.5283 GB, free: 4.785 MB / 382.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0006471/0.3868, allocations: 440.1 kB / 0.5287 GB, free: 4.531 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.351e-05/0.3868, allocations: 3.938 kB / 0.5287 GB, free: 4.527 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.244e-05/0.3869, allocations: 16.41 kB / 0.5287 GB, free: 4.516 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.281e-05/0.3869, allocations: 8.656 kB / 0.5287 GB, free: 4.516 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005492/0.3874, allocations: 291 kB / 0.529 GB, free: 4.414 MB / 382.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001677/0.3891, allocations: 1.481 MB / 0.5305 GB, free: 3.348 MB / 382.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0007161/0.3898, allocations: 332.4 kB / 0.5308 GB, free: 3.211 MB / 382.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002539/0.3901, allocations: 129.5 kB / 0.5309 GB, free: 3.16 MB / 382.1 MB Notification: Performance of preOpt evalFunc (simulation): time 3.071e-05/0.3901, allocations: 3.688 kB / 0.5309 GB, free: 3.16 MB / 382.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.332e-05/0.3901, allocations: 41.23 kB / 0.5309 GB, free: 3.113 MB / 382.1 MB Notification: Performance of pre-optimization done (n=28): time 1.643e-06/0.3901, allocations: 3.938 kB / 0.5309 GB, free: 3.109 MB / 382.1 MB Notification: Performance of matching and sorting (n=28): time 0.0008378/0.391, allocations: 411.4 kB / 0.5313 GB, free: 2.938 MB / 382.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.984e-05/0.391, allocations: 158.8 kB / 0.5315 GB, free: 2.75 MB / 382.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003823/0.3914, allocations: 411.2 kB / 0.5319 GB, free: 2.551 MB / 382.1 MB Notification: Performance of collectPreVariables (initialization): time 2.367e-05/0.3914, allocations: 30.86 kB / 0.5319 GB, free: 2.516 MB / 382.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0001353/0.3916, allocations: 269.7 kB / 0.5322 GB, free: 2.297 MB / 382.1 MB Notification: Performance of collectInitialBindings (initialization): time 5.823e-05/0.3916, allocations: 99.44 kB / 0.5323 GB, free: 2.219 MB / 382.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 9.494e-05/0.3917, allocations: 66.03 kB / 0.5323 GB, free: 2.18 MB / 382.1 MB Notification: Performance of setup shared object (initialization): time 7.111e-05/0.3918, allocations: 356.6 kB / 0.5327 GB, free: 1.848 MB / 382.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002438/0.392, allocations: 117.1 kB / 0.5328 GB, free: 1.801 MB / 382.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0002854/0.3923, allocations: 208.1 kB / 0.533 GB, free: 1.652 MB / 382.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001406/0.3937, allocations: 0.5279 MB / 0.5335 GB, free: 1.402 MB / 382.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.156e-06/0.3937, allocations: 0.5312 kB / 0.5335 GB, free: 1.402 MB / 382.1 MB Notification: Performance of matching and sorting (n=40) (initialization): time 0.0007264/0.3944, allocations: 384.8 kB / 0.5339 GB, free: 1.234 MB / 382.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.867e-05/0.3945, allocations: 6.344 kB / 0.5339 GB, free: 1.234 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.994e-06/0.3945, allocations: 7.094 kB / 0.5339 GB, free: 1.23 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 2.03e-05/0.3945, allocations: 3.172 kB / 0.5339 GB, free: 1.23 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003106/0.3948, allocations: 75.39 kB / 0.5339 GB, free: 1.219 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.036e-05/0.3948, allocations: 4.219 kB / 0.5339 GB, free: 1.219 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002377/0.395, allocations: 47.23 kB / 0.534 GB, free: 1.191 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.373e-05/0.3951, allocations: 14.05 kB / 0.534 GB, free: 1.188 MB / 382.1 MB Warning: Assuming fixed start value for the following 1 variables: F.y:VARIABLE(flow=false start = F.y_start fixed = true ) \"Connector of Real output signal\" type: Real Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.000334/0.3954, allocations: 206.9 kB / 0.5342 GB, free: 1.051 MB / 382.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0002044/0.3956, allocations: 183.2 kB / 0.5344 GB, free: 0.9062 MB / 382.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001049/0.3967, allocations: 475.8 kB / 0.5348 GB, free: 0.6641 MB / 382.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.934e-06/0.3967, allocations: 1 kB / 0.5348 GB, free: 0.6641 MB / 382.1 MB Notification: Performance of matching and sorting (n=40) (initialization_lambda0): time 0.0004827/0.3971, allocations: 330.2 kB / 0.5351 GB, free: 0.5078 MB / 382.1 MB Notification: Performance of prepare postOptimizeDAE: time 9.678e-06/0.3972, allocations: 10.12 kB / 0.5352 GB, free: 0.5039 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.838e-06/0.3972, allocations: 1.766 kB / 0.5352 GB, free: 0.5039 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 4.679e-06/0.3972, allocations: 3.5 kB / 0.5352 GB, free: 0.5039 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002537/0.3974, allocations: 62.95 kB / 0.5352 GB, free: 0.4961 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.831e-06/0.3974, allocations: 8.125 kB / 0.5352 GB, free: 0.4922 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002337/0.3977, allocations: 32.75 kB / 0.5353 GB, free: 484 kB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.072e-05/0.3977, allocations: 13.75 kB / 0.5353 GB, free: 480 kB / 382.1 MB Warning: Assuming fixed start value for the following 1 variables: F.y:VARIABLE(flow=false start = F.y_start fixed = true ) \"Connector of Real output signal\" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 (PIe.I.local_reset,PIp.I.local_reset,Gs.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (40): * Single equations (assignments): 40 * 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 0.0001184/0.3978, allocations: 215.9 kB / 0.5355 GB, free: 264 kB / 382.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 7.365e-05/0.3979, allocations: 50.42 kB / 0.5355 GB, free: 236 kB / 382.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0001072/0.398, allocations: 51.16 kB / 0.5356 GB, free: 196 kB / 382.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.731e-06/0.398, allocations: 8.047 kB / 0.5356 GB, free: 192 kB / 382.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.316e-06/0.398, allocations: 0 / 0.5356 GB, free: 192 kB / 382.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 5.631e-06/0.398, allocations: 1.594 kB / 0.5356 GB, free: 192 kB / 382.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0005207/0.3985, allocations: 436.6 kB / 0.536 GB, free: 15.91 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.874e-06/0.3985, allocations: 0 / 0.536 GB, free: 15.91 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003139/0.3988, allocations: 58.73 kB / 0.5361 GB, free: 15.9 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 2.945e-06/0.3988, allocations: 1.125 kB / 0.5361 GB, free: 15.9 MB / 398.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.323e-05/0.3989, allocations: 10.59 kB / 0.5361 GB, free: 15.89 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.405e-06/0.3989, allocations: 1.156 kB / 0.5361 GB, free: 15.89 MB / 398.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.142e-06/0.3989, allocations: 0 / 0.5361 GB, free: 15.89 MB / 398.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0009624/0.3998, allocations: 0.5489 MB / 0.5366 GB, free: 15.59 MB / 398.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0001492/0.4, allocations: 76.08 kB / 0.5367 GB, free: 15.54 MB / 398.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.238e-05/0.4, allocations: 7.344 kB / 0.5367 GB, free: 15.54 MB / 398.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002325/0.4003, allocations: 18.06 kB / 0.5367 GB, free: 15.53 MB / 398.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.207e-05/0.4003, allocations: 18.33 kB / 0.5367 GB, free: 15.53 MB / 398.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.491e-05/0.4003, allocations: 4.688 kB / 0.5367 GB, free: 15.53 MB / 398.1 MB Notification: Performance of sorting global known variables: time 0.0003236/0.4006, allocations: 283 kB / 0.537 GB, free: 15.39 MB / 398.1 MB Notification: Performance of sort global known variables: time 8e-08/0.4006, allocations: 0 / 0.537 GB, free: 15.39 MB / 398.1 MB Notification: Performance of remove unused functions: time 0.0005241/0.4012, allocations: 142.5 kB / 0.5371 GB, free: 15.35 MB / 398.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 5 (F.y,Gs.y,T.y,PIp.I.y,PIe.I.y) * 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): 28 * 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 0.00134/0.4025, allocations: 1.093 MB / 0.5382 GB, free: 14.52 MB / 398.1 MB Notification: Performance of simCode: created initialization part: time 0.0008909/0.4034, allocations: 401.5 kB / 0.5386 GB, free: 14.38 MB / 398.1 MB Notification: Performance of simCode: created event and clocks part: time 2.726e-06/0.4034, allocations: 0 / 0.5386 GB, free: 14.38 MB / 398.1 MB Notification: Performance of simCode: created simulation system equations: time 0.000277/0.4037, allocations: 131.4 kB / 0.5387 GB, free: 14.34 MB / 398.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0007222/0.4044, allocations: 129.8 kB / 0.5388 GB, free: 14.3 MB / 398.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005892/0.4103, allocations: 3.774 MB / 0.5425 GB, free: 12.02 MB / 398.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004877/0.4108, allocations: 0.8292 MB / 0.5433 GB, free: 11.32 MB / 398.1 MB Notification: Performance of simCode: alias equations: time 0.0003356/0.4111, allocations: 44.97 kB / 0.5434 GB, free: 11.31 MB / 398.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003068/0.4114, allocations: 158.9 kB / 0.5435 GB, free: 11.19 MB / 398.1 MB Notification: Performance of SimCode: time 1.303e-06/0.4114, allocations: 4 kB / 0.5435 GB, free: 11.18 MB / 398.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04057/0.452, allocations: 9.242 MB / 0.5526 GB, free: 7.477 MB / 398.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 11.53/11.98, allocations: 1.938 kB / 0.5526 GB, free: 7.477 MB / 398.1 MB " [Timeout remaining time 648] (rm -f AES_AES.Coursework.ElecSys_generator_models.BoilerFollows.pipe ; mkfifo AES_AES.Coursework.ElecSys_generator_models.BoilerFollows.pipe ; head -c 1048576 < AES_AES.Coursework.ElecSys_generator_models.BoilerFollows.pipe >> ../files/AES_AES.Coursework.ElecSys_generator_models.BoilerFollows.sim & python3 -m fmpy simulate --output-file AES_AES.Coursework.ElecSys_generator_models.BoilerFollows_res.csv --start-time 0 --stop-time 2000 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 1 AES_AES_Coursework_ElecSys_generator_models_BoilerFollows.fmu > AES_AES.Coursework.ElecSys_generator_models.BoilerFollows.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 14.934863545000553] Failed to read output from testmodel.py, exit status != 0: 12.096362299998873 12.12504575 11.735242436 Calling exit ...