Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp.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 0.001599/0.001599, allocations: 99.64 kB / 18.95 MB, free: 2.676 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 0.001695/0.001695, allocations: 216.8 kB / 22.25 MB, free: 5.258 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 1.472/1.472, allocations: 230.6 MB / 256 MB, free: 7.789 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/package.mo): time 3.356/3.356, allocations: 0.5107 GB / 0.8158 GB, free: 17.81 MB / 0.6231 GB " [Timeout remaining time 176] Using package Buildings with version 13.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings master/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(Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp,fileNamePrefix="Buildings_latest_Buildings_Fluid_DXSystems_Cooling_BaseClasses_Examples_UACp",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp,fileNamePrefix="Buildings_latest_Buildings_Fluid_DXSystems_Cooling_BaseClasses_Examples_UACp",fmuType="me",version="2.0",platforms={"static"}) [Timeout 300] "Notification: Buildings 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 0.002114/0.002114, allocations: 64.34 kB / 1.186 GB, free: 13.65 MB / 0.9044 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3824/0.3845, allocations: 181.9 MB / 1.363 GB, free: 14.05 MB / 1.061 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp): time 0.003261/0.3878, allocations: 1.68 MB / 1.365 GB, free: 12.35 MB / 1.061 GB Notification: Performance of NFInst.instExpressions: time 0.1752/0.563, allocations: 130.4 MB / 1.492 GB, free: 9.488 MB / 1.186 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001006/0.5631, allocations: 4 kB / 1.492 GB, free: 9.484 MB / 1.186 GB Notification: Performance of NFTyping.typeComponents: time 0.0002144/0.5633, allocations: 43.64 kB / 1.492 GB, free: 9.441 MB / 1.186 GB Notification: Performance of NFTyping.typeBindings: time 0.001326/0.5646, allocations: 438 kB / 1.493 GB, free: 9.012 MB / 1.186 GB Notification: Performance of NFTyping.typeClassSections: time 0.0001742/0.5648, allocations: 67.81 kB / 1.493 GB, free: 8.945 MB / 1.186 GB Notification: Performance of NFFlatten.flatten: time 0.0002439/0.565, allocations: 151.3 kB / 1.493 GB, free: 8.797 MB / 1.186 GB Notification: Performance of NFFlatten.resolveConnections: time 4.69e-05/0.5651, allocations: 5.594 kB / 1.493 GB, free: 8.789 MB / 1.186 GB Notification: Performance of NFEvalConstants.evaluate: time 7.579e-05/0.5652, allocations: 51.84 kB / 1.493 GB, free: 8.738 MB / 1.186 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0001676/0.5653, allocations: 63.73 kB / 1.493 GB, free: 8.676 MB / 1.186 GB Notification: Performance of NFPackage.collectConstants: time 2.298e-05/0.5654, allocations: 12 kB / 1.493 GB, free: 8.664 MB / 1.186 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0009488/0.5663, allocations: 454.9 kB / 1.494 GB, free: 8.219 MB / 1.186 GB Notification: Performance of NFScalarize.scalarize: time 3.277e-05/0.5663, allocations: 27.91 kB / 1.494 GB, free: 8.191 MB / 1.186 GB Notification: Performance of NFVerifyModel.verify: time 6.203e-05/0.5664, allocations: 47.73 kB / 1.494 GB, free: 8.145 MB / 1.186 GB Notification: Performance of NFConvertDAE.convert: time 0.0006773/0.5671, allocations: 370.9 kB / 1.494 GB, free: 7.781 MB / 1.186 GB Notification: Performance of FrontEnd - DAE generated: time 4.398e-06/0.5671, allocations: 4 kB / 1.494 GB, free: 7.777 MB / 1.186 GB Notification: Performance of FrontEnd: time 3.146e-06/0.5671, allocations: 3.984 kB / 1.494 GB, free: 7.773 MB / 1.186 GB Notification: Performance of Transformations before backend: time 5.54e-06/0.5671, allocations: 3.938 kB / 1.494 GB, free: 7.77 MB / 1.186 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 0 * Number of variables: 0 Notification: Performance of Generate backend data structure: time 0.0007238/0.5678, allocations: 413 kB / 1.494 GB, free: 7.336 MB / 1.186 GB Notification: Performance of prepare preOptimizeDAE: time 4.155e-05/0.5679, allocations: 12.03 kB / 1.494 GB, free: 7.324 MB / 1.186 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 6.534e-05/0.5679, allocations: 106 kB / 1.495 GB, free: 7.211 MB / 1.186 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01028/0.5782, allocations: 1.713 MB / 1.496 GB, free: 5.496 MB / 1.186 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004232/0.5786, allocations: 258.2 kB / 1.496 GB, free: 5.219 MB / 1.186 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.987e-05/0.5787, allocations: 150.6 kB / 1.497 GB, free: 5.07 MB / 1.186 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001047/0.5788, allocations: 154.6 kB / 1.497 GB, free: 4.918 MB / 1.186 GB Notification: Performance of preOpt clockPartitioning (simulation): time 7.872e-05/0.5789, allocations: 105 kB / 1.497 GB, free: 4.809 MB / 1.186 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.465e-05/0.5789, allocations: 75.28 kB / 1.497 GB, free: 4.734 MB / 1.186 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.437e-05/0.579, allocations: 150.6 kB / 1.497 GB, free: 4.586 MB / 1.186 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.267e-05/0.579, allocations: 158.5 kB / 1.497 GB, free: 4.43 MB / 1.186 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 6.768e-05/0.5791, allocations: 150.6 kB / 1.497 GB, free: 4.281 MB / 1.186 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0005169/0.5796, allocations: 0.5242 MB / 1.498 GB, free: 3.715 MB / 1.186 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0001056/0.5797, allocations: 173.2 kB / 1.498 GB, free: 3.535 MB / 1.186 GB Notification: Performance of preOpt resolveLoops (simulation): time 4.17e-05/0.5798, allocations: 84.14 kB / 1.498 GB, free: 3.449 MB / 1.186 GB Notification: Performance of preOpt evalFunc (simulation): time 4.003e-05/0.5798, allocations: 75.28 kB / 1.498 GB, free: 3.375 MB / 1.186 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.057e-05/0.5799, allocations: 113.8 kB / 1.498 GB, free: 3.254 MB / 1.186 GB Notification: Performance of pre-optimization done (n=0): time 2.174e-06/0.5799, allocations: 0 / 1.498 GB, free: 3.254 MB / 1.186 GB Notification: Performance of matching and sorting (n=0): time 0.0003654/0.5802, allocations: 57.58 kB / 1.498 GB, free: 3.191 MB / 1.186 GB Notification: Performance of inlineWhenForInitialization (initialization): time 7.425e-05/0.5803, allocations: 130.7 kB / 1.498 GB, free: 3.051 MB / 1.186 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003382/0.5807, allocations: 219.2 kB / 1.499 GB, free: 2.828 MB / 1.186 GB Notification: Performance of collectPreVariables (initialization): time 4.327e-05/0.5807, allocations: 29.7 kB / 1.499 GB, free: 2.793 MB / 1.186 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001016/0.5808, allocations: 100.1 kB / 1.499 GB, free: 2.691 MB / 1.186 GB Notification: Performance of collectInitialBindings (initialization): time 5.791e-06/0.5808, allocations: 7.938 kB / 1.499 GB, free: 2.684 MB / 1.186 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001084/0.5809, allocations: 25.7 kB / 1.499 GB, free: 2.652 MB / 1.186 GB Notification: Performance of setup shared object (initialization): time 0.0001546/0.5811, allocations: 326.8 kB / 1.499 GB, free: 2.324 MB / 1.186 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003939/0.585, allocations: 0.7812 MB / 1.5 GB, free: 1.539 MB / 1.186 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003831/0.5888, allocations: 0.7765 MB / 1.501 GB, free: 0.7617 MB / 1.186 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003451/0.5923, allocations: 0.6914 MB / 1.501 GB, free: 68 kB / 1.186 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.769e-06/0.5923, allocations: 0 / 1.501 GB, free: 68 kB / 1.186 GB Notification: Performance of matching and sorting (n=6) (initialization): time 0.007988/0.6003, allocations: 1.555 MB / 1.503 GB, free: 14.5 MB / 1.201 GB Notification: Performance of prepare postOptimizeDAE: time 2.607e-05/0.6003, allocations: 14.34 kB / 1.503 GB, free: 14.49 MB / 1.201 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.214e-06/0.6003, allocations: 0 / 1.503 GB, free: 14.49 MB / 1.201 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0007899/0.6011, allocations: 148.6 kB / 1.503 GB, free: 14.34 MB / 1.201 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00191/0.603, allocations: 327.6 kB / 1.503 GB, free: 14.02 MB / 1.201 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002278/0.6053, allocations: 1.49 MB / 1.505 GB, free: 12.41 MB / 1.201 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001967/0.6073, allocations: 319.6 kB / 1.505 GB, free: 12.09 MB / 1.201 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.113e-05/0.6073, allocations: 11.98 kB / 1.505 GB, free: 12.08 MB / 1.201 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.00392/0.6112, allocations: 0.8547 MB / 1.506 GB, free: 11.22 MB / 1.201 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.003813/0.615, allocations: 0.7765 MB / 1.507 GB, free: 10.45 MB / 1.201 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003453/0.6185, allocations: 0.6758 MB / 1.507 GB, free: 9.766 MB / 1.201 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.434e-06/0.6185, allocations: 3.938 kB / 1.507 GB, free: 9.762 MB / 1.201 GB Notification: Performance of matching and sorting (n=6) (initialization_lambda0): time 0.007587/0.6261, allocations: 1.532 MB / 1.509 GB, free: 8.219 MB / 1.201 GB Notification: Performance of prepare postOptimizeDAE: time 1.532e-05/0.6261, allocations: 4 kB / 1.509 GB, free: 8.215 MB / 1.201 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.468e-06/0.6261, allocations: 256 / 1.509 GB, free: 8.215 MB / 1.201 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004422/0.6265, allocations: 112.7 kB / 1.509 GB, free: 8.102 MB / 1.201 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001898/0.6284, allocations: 327.6 kB / 1.509 GB, free: 7.781 MB / 1.201 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001426/0.6299, allocations: 1.346 MB / 1.511 GB, free: 6.32 MB / 1.201 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001986/0.6318, allocations: 327.6 kB / 1.511 GB, free: 6 MB / 1.201 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.691e-05/0.6319, allocations: 0 / 1.511 GB, free: 6 MB / 1.201 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 1 * 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 (4): * Single equations (assignments): 3 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(1,2)} Notification: Performance of prepare postOptimizeDAE: time 0.0001833/0.632, allocations: 271.5 kB / 1.511 GB, free: 5.727 MB / 1.201 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001059/0.6322, allocations: 116.8 kB / 1.511 GB, free: 5.605 MB / 1.201 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 6.42e-05/0.6322, allocations: 113.3 kB / 1.511 GB, free: 5.488 MB / 1.201 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.038e-05/0.6323, allocations: 192.2 kB / 1.512 GB, free: 5.293 MB / 1.201 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.398e-05/0.6324, allocations: 176.3 kB / 1.512 GB, free: 5.113 MB / 1.201 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.366e-05/0.6324, allocations: 180.2 kB / 1.512 GB, free: 4.93 MB / 1.201 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0003043/0.6327, allocations: 404.3 kB / 1.512 GB, free: 4.484 MB / 1.201 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.869e-05/0.6328, allocations: 104.9 kB / 1.512 GB, free: 4.375 MB / 1.201 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 4.839e-05/0.6328, allocations: 113 kB / 1.512 GB, free: 4.258 MB / 1.201 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.775e-05/0.6329, allocations: 180.3 kB / 1.513 GB, free: 4.074 MB / 1.201 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8e-05/0.633, allocations: 184.2 kB / 1.513 GB, free: 3.887 MB / 1.201 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 7.96e-05/0.6331, allocations: 192.2 kB / 1.513 GB, free: 3.691 MB / 1.201 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 7.509e-05/0.6332, allocations: 176.3 kB / 1.513 GB, free: 3.512 MB / 1.201 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0001938/0.6334, allocations: 311.7 kB / 1.513 GB, free: 3.184 MB / 1.201 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001158/0.6335, allocations: 128.8 kB / 1.514 GB, free: 3.051 MB / 1.201 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 9.719e-05/0.6336, allocations: 188.2 kB / 1.514 GB, free: 2.859 MB / 1.201 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001864/0.6338, allocations: 101 kB / 1.514 GB, free: 2.754 MB / 1.201 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.202e-05/0.6338, allocations: 184.2 kB / 1.514 GB, free: 2.566 MB / 1.201 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.692e-05/0.6339, allocations: 101 kB / 1.514 GB, free: 2.461 MB / 1.201 GB Notification: Performance of sorting global known variables: time 0.000231/0.6341, allocations: 173.1 kB / 1.514 GB, free: 2.293 MB / 1.201 GB Notification: Performance of sort global known variables: time 8e-08/0.6341, allocations: 0 / 1.514 GB, free: 2.293 MB / 1.201 GB Notification: Performance of remove unused functions: time 0.0004846/0.6346, allocations: 76 kB / 1.514 GB, free: 2.219 MB / 1.201 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * 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 simulation (0): * Single equations (assignments): 0 * 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 0.0005965/0.6352, allocations: 0.8401 MB / 1.515 GB, free: 1.352 MB / 1.201 GB Notification: Performance of simCode: created initialization part: time 0.008617/0.6438, allocations: 1.82 MB / 1.517 GB, free: 15.5 MB / 1.217 GB Notification: Performance of simCode: created event and clocks part: time 3.897e-06/0.6438, allocations: 0 / 1.517 GB, free: 15.5 MB / 1.217 GB Notification: Performance of simCode: created simulation system equations: time 5.4e-06/0.6438, allocations: 3.938 kB / 1.517 GB, free: 15.5 MB / 1.217 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0005681/0.6444, allocations: 479.8 kB / 1.517 GB, free: 15.03 MB / 1.217 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0228/0.6672, allocations: 5.915 MB / 1.523 GB, free: 9.02 MB / 1.217 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0001131/0.6673, allocations: 85.75 kB / 1.523 GB, free: 8.918 MB / 1.217 GB Notification: Performance of simCode: alias equations: time 0.0003058/0.6676, allocations: 36.48 kB / 1.523 GB, free: 8.883 MB / 1.217 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001356/0.6677, allocations: 31.42 kB / 1.523 GB, free: 8.852 MB / 1.217 GB Notification: Performance of SimCode: time 1.282e-06/0.6677, allocations: 192 / 1.523 GB, free: 8.852 MB / 1.217 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04025/0.708, allocations: 7.123 MB / 1.53 GB, free: 1.895 MB / 1.217 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.18/13.89, allocations: 5.141 kB / 1.53 GB, free: 1.891 MB / 1.217 GB " [Timeout remaining time 286] (rm -f Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp.pipe ; mkfifo Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp.pipe >> ../files/Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp_res.mat --tempDir=temp_Buildings_latest_Buildings_Fluid_DXSystems_Cooling_BaseClasses_Examples_UACp_fmu --startTime=0 --stopTime=60 --stepSize=0.024 --timeout=800 --tolerance=1e-06 Buildings_latest_Buildings_Fluid_DXSystems_Cooling_BaseClasses_Examples_UACp.fmu > Buildings_latest_Buildings.Fluid.DXSystems.Cooling.BaseClasses.Examples.UACp.pipe 2>&1) [Timeout 840.0] [Calling os._exit(0), Time elapsed: 20.931778627913445] Failed to read output from testmodel.py, exit status != 0: 14.013688263017684 14.040078775 13.467897147 Calling exit ...