Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IndustrialControlSystems_IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl.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 0.001287/0.001287, allocations: 97.88 kB / 19.73 MB, free: 2.117 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 0.001394/0.001394, allocations: 218.7 kB / 23.03 MB, free: 4.922 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 1.339/1.339, allocations: 230.6 MB / 256.8 MB, free: 7.812 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IndustrialControlSystems 2.0.0/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IndustrialControlSystems 2.0.0/package.mo): time 0.06183/0.06183, allocations: 11.35 MB / 324.6 MB, free: 8.027 MB / 254.1 MB " [Timeout remaining time 180] Using package IndustrialControlSystems with version 2.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IndustrialControlSystems 2.0.0/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(IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl,fileNamePrefix="IndustrialControlSystems_IndustrialControlSystems_Applications_ProcessControl_CascadeLevelControl",fmuType="cs",version="2.0",platforms={"static"}) "" <> buildModelFMU(IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl,fileNamePrefix="IndustrialControlSystems_IndustrialControlSystems_Applications_ProcessControl_CascadeLevelControl",fmuType="cs",version="2.0",platforms={"static"}) [Timeout 660] "Notification: IndustrialControlSystems 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 0.002001/0.002001, allocations: 59.91 kB / 453 MB, free: 9.074 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1088/0.1108, allocations: 56.08 MB / 0.4971 GB, free: 0.8984 MB / 366.1 MB Notification: Performance of NFInst.instantiate(IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl): time 0.2212/0.332, allocations: 23.21 MB / 0.5198 GB, free: 8.758 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.008078/0.3401, allocations: 6.335 MB / 0.526 GB, free: 7.355 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001063/0.3412, allocations: 72.75 kB / 0.5261 GB, free: 7.309 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001073/0.3423, allocations: 429.5 kB / 0.5265 GB, free: 7.129 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.002603/0.3449, allocations: 1.19 MB / 0.5276 GB, free: 6.586 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.00337/0.3482, allocations: 1.355 MB / 0.529 GB, free: 6.32 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.003342/0.3516, allocations: 2.66 MB / 0.5315 GB, free: 5.789 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001095/0.3527, allocations: 0.6893 MB / 0.5322 GB, free: 5.711 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002031/0.3547, allocations: 1.127 MB / 0.5333 GB, free: 5.434 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001563/0.3563, allocations: 0.9653 MB / 0.5343 GB, free: 5.18 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002129/0.3565, allocations: 98.66 kB / 0.5344 GB, free: 5.18 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.001412/0.3579, allocations: 427.8 kB / 0.5348 GB, free: 5.129 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.00044/0.3583, allocations: 399.2 kB / 0.5351 GB, free: 5.055 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0006258/0.3589, allocations: 0.5389 MB / 0.5357 GB, free: 4.895 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.002141/0.3611, allocations: 1.701 MB / 0.5373 GB, free: 4.254 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.747e-06/0.3611, allocations: 0 / 0.5373 GB, free: 4.254 MB / 382.1 MB Notification: Performance of FrontEnd: time 1.493e-06/0.3611, allocations: 0 / 0.5373 GB, free: 4.254 MB / 382.1 MB Notification: Performance of Transformations before backend: time 2.766e-05/0.3611, allocations: 1.406 kB / 0.5373 GB, free: 4.254 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: 242 * Number of variables: 242 Notification: Performance of Generate backend data structure: time 0.003032/0.3642, allocations: 1.594 MB / 0.5389 GB, free: 3.27 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.757e-05/0.3642, allocations: 13.59 kB / 0.5389 GB, free: 3.266 MB / 382.1 MB Notification: Performance of preOpt introduceOutputRealDerivatives (simulation): time 4.343e-05/0.3642, allocations: 25.25 kB / 0.5389 GB, free: 3.262 MB / 382.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.00019/0.3644, allocations: 151.3 kB / 0.5391 GB, free: 3.164 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0005233/0.365, allocations: 163.5 kB / 0.5392 GB, free: 3.09 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001505/0.3665, allocations: 0.7917 MB / 0.54 GB, free: 2.629 MB / 382.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001659/0.3666, allocations: 301.9 kB / 0.5403 GB, free: 2.34 MB / 382.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001506/0.3668, allocations: 101.1 kB / 0.5404 GB, free: 2.301 MB / 382.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002012/0.3688, allocations: 1.759 MB / 0.5421 GB, free: 1.07 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.892e-05/0.3688, allocations: 6.406 kB / 0.5421 GB, free: 1.066 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001023/0.3689, allocations: 45.3 kB / 0.5422 GB, free: 1.035 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.161e-05/0.369, allocations: 61.06 kB / 0.5422 GB, free: 1.023 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00155/0.3705, allocations: 1.076 MB / 0.5433 GB, free: 0.6562 MB / 382.1 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 0.007528/0.3781, allocations: 6.127 MB / 0.5493 GB, free: 11.52 MB / 398.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001572/0.3796, allocations: 0.7437 MB / 0.55 GB, free: 11.15 MB / 398.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006818/0.3803, allocations: 413.3 kB / 0.5504 GB, free: 10.94 MB / 398.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.002072/0.3824, allocations: 1.044 MB / 0.5514 GB, free: 10.21 MB / 398.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.842e-05/0.3824, allocations: 44.34 kB / 0.5514 GB, free: 10.16 MB / 398.1 MB Notification: Performance of pre-optimization done (n=78): time 2.184e-06/0.3824, allocations: 0 / 0.5514 GB, free: 10.16 MB / 398.1 MB Notification: Performance of matching and sorting (n=83): time 0.006534/0.389, allocations: 2.817 MB / 0.5542 GB, free: 8.574 MB / 398.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 9.752e-05/0.3891, allocations: 143.5 kB / 0.5543 GB, free: 8.414 MB / 398.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001167/0.3902, allocations: 0.9307 MB / 0.5552 GB, free: 7.883 MB / 398.1 MB Notification: Performance of collectPreVariables (initialization): time 7.306e-05/0.3903, allocations: 45.77 kB / 0.5553 GB, free: 7.836 MB / 398.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0004845/0.3908, allocations: 0.6086 MB / 0.5559 GB, free: 7.289 MB / 398.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0002689/0.3911, allocations: 307.9 kB / 0.5562 GB, free: 7.023 MB / 398.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003558/0.3914, allocations: 256.7 kB / 0.5564 GB, free: 6.871 MB / 398.1 MB Notification: Performance of setup shared object (initialization): time 0.0001882/0.3916, allocations: 359 kB / 0.5567 GB, free: 6.527 MB / 398.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007206/0.3923, allocations: 424.9 kB / 0.5572 GB, free: 6.324 MB / 398.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001176/0.3935, allocations: 0.9988 MB / 0.5581 GB, free: 5.348 MB / 398.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.01067/0.4042, allocations: 3.043 MB / 0.5611 GB, free: 3.438 MB / 398.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.568e-06/0.4042, allocations: 5.719 kB / 0.5611 GB, free: 3.438 MB / 398.1 MB Notification: Performance of matching and sorting (n=165) (initialization): time 0.002734/0.4069, allocations: 1.611 MB / 0.5627 GB, free: 2.598 MB / 398.1 MB Notification: Performance of prepare postOptimizeDAE: time 2.323e-05/0.4069, allocations: 11.28 kB / 0.5627 GB, free: 2.598 MB / 398.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.987e-05/0.407, allocations: 24.88 kB / 0.5627 GB, free: 2.59 MB / 398.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.000811/0.4078, allocations: 370.3 kB / 0.5631 GB, free: 2.426 MB / 398.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009547/0.4087, allocations: 283.8 kB / 0.5633 GB, free: 2.234 MB / 398.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003968/0.4127, allocations: 4.084 MB / 0.5673 GB, free: 13.91 MB / 414.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009726/0.4137, allocations: 48.03 kB / 0.5674 GB, free: 13.86 MB / 414.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001279/0.4138, allocations: 68.69 kB / 0.5674 GB, free: 13.8 MB / 414.1 MB Warning: Assuming fixed start value for the following 3 variables: tank.level:VARIABLE(min = 0.0 start = tank.level_start_eps unit = \"m\" fixed = true stateSelect=StateSelect.prefer ) \"Level height of tank\" type: Real tank.medium.T:VARIABLE(min = 1.0 max = 1e4 start = tank.T_start unit = \"K\" fixed = true nominal = 300.0 stateSelect=StateSelect.prefer ) \"Temperature of medium\" type: Real actuator.y:VARIABLE(flow=false min = 0.0 max = 1.0 start = actuator.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: 74 * Number of states: 0 () * Number of discrete variables: 20 (tank.inFlow[3],tank.inFlow[2],tank.inFlow[1],tank.regularFlow[3],tank.regularFlow[2],tank.regularFlow[1],PI_Valve.TS_in,PI_Level.TS_in,PI_Valve.satLOW_in,PI_Valve.satHIGH_in,PI_Valve.ATreq_in,sub.Yfp,sub.U2fp,sub.U1fp,div.Yfp,div.U2fp,div.U1fp,PI_Level.satLOW_in,PI_Level.satHIGH_in,PI_Level.ATreq_in) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (152): * Single equations (assignments): 149 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(3,7), (2,1), (2,1)} Notification: Performance of prepare postOptimizeDAE: time 0.0006553/0.4145, allocations: 345.3 kB / 0.5678 GB, free: 13.45 MB / 414.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002187/0.4147, allocations: 123.2 kB / 0.5679 GB, free: 13.33 MB / 414.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003042/0.4177, allocations: 1.521 MB / 0.5694 GB, free: 11.81 MB / 414.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.539e-05/0.4177, allocations: 11.98 kB / 0.5694 GB, free: 11.8 MB / 414.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.665e-06/0.4177, allocations: 11.94 kB / 0.5694 GB, free: 11.79 MB / 414.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.383e-05/0.4177, allocations: 7.922 kB / 0.5694 GB, free: 11.78 MB / 414.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003914/0.4217, allocations: 2.267 MB / 0.5716 GB, free: 9.438 MB / 414.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.721e-06/0.4217, allocations: 4.031 kB / 0.5716 GB, free: 9.434 MB / 414.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007759/0.4224, allocations: 171.8 kB / 0.5718 GB, free: 9.266 MB / 414.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0008032/0.4232, allocations: 344.6 kB / 0.5721 GB, free: 8.926 MB / 414.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.731e-05/0.4233, allocations: 27.94 kB / 0.5721 GB, free: 8.898 MB / 414.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003896/0.4272, allocations: 4.068 MB / 0.5761 GB, free: 4.582 MB / 414.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.629e-06/0.4272, allocations: 5.969 kB / 0.5761 GB, free: 4.578 MB / 414.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003488/0.4307, allocations: 1.944 MB / 0.578 GB, free: 2.594 MB / 414.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0005652/0.4313, allocations: 207.1 kB / 0.5782 GB, free: 2.391 MB / 414.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001585/0.4314, allocations: 24 kB / 0.5782 GB, free: 2.367 MB / 414.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005674/0.432, allocations: 31.92 kB / 0.5783 GB, free: 2.336 MB / 414.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002016/0.4322, allocations: 92.77 kB / 0.5784 GB, free: 2.246 MB / 414.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.928e-05/0.4323, allocations: 39.98 kB / 0.5784 GB, free: 2.207 MB / 414.1 MB Notification: Performance of sorting global known variables: time 0.0008639/0.4331, allocations: 0.6372 MB / 0.579 GB, free: 1.562 MB / 414.1 MB Notification: Performance of sort global known variables: time 8.1e-08/0.4331, allocations: 0 / 0.579 GB, free: 1.562 MB / 414.1 MB Notification: Performance of remove unused functions: time 0.001383/0.4345, allocations: 347.7 kB / 0.5793 GB, free: 1.223 MB / 414.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 7 (PI_Level.Iaction,PI_Level.Fder,tank.level,tank.medium.T,actuator.y,PI_Valve.Iaction,PI_Valve.Fder) * Number of discrete variables: 6 (tank.regularFlow[1],tank.regularFlow[2],tank.regularFlow[3],tank.inFlow[1],tank.inFlow[2],tank.inFlow[3]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (83): * Single equations (assignments): 78 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 3 * 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): 3 systems {(3,9), (2,1), (2,1)} Notification: Performance of Backend phase and start with SimCode phase: time 0.004251/0.4388, allocations: 2.658 MB / 0.5819 GB, free: 14.51 MB / 430.1 MB Notification: Performance of simCode: created initialization part: time 0.002572/0.4414, allocations: 1.34 MB / 0.5832 GB, free: 13.15 MB / 430.1 MB Notification: Performance of simCode: created event and clocks part: time 5.179e-06/0.4414, allocations: 3.938 kB / 0.5833 GB, free: 13.14 MB / 430.1 MB Notification: Performance of simCode: created simulation system equations: time 0.001332/0.4427, allocations: 0.7773 MB / 0.584 GB, free: 12.35 MB / 430.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002257/0.4449, allocations: 489.1 kB / 0.5845 GB, free: 11.88 MB / 430.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01594/0.4609, allocations: 10.55 MB / 0.5948 GB, free: 0.6992 MB / 430.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005906/0.4615, allocations: 0.5477 MB / 0.5953 GB, free: 120 kB / 430.1 MB Notification: Performance of simCode: alias equations: time 0.001012/0.4625, allocations: 316.6 kB / 0.5956 GB, free: 15.82 MB / 446.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000639/0.4631, allocations: 475.2 kB / 0.5961 GB, free: 15.36 MB / 446.1 MB Notification: Performance of SimCode: time 1.162e-06/0.4631, allocations: 0 / 0.5961 GB, free: 15.36 MB / 446.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.07979/0.5429, allocations: 35.84 MB / 0.6311 GB, free: 12 MB / 478.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 14.42/14.96, allocations: 3.938 kB / 0.6311 GB, free: 12 MB / 478.1 MB " [Timeout remaining time 645] (rm -f IndustrialControlSystems_IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl.pipe ; mkfifo IndustrialControlSystems_IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl.pipe ; head -c 1048576 < IndustrialControlSystems_IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl.pipe >> ../files/IndustrialControlSystems_IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IndustrialControlSystems_IndustrialControlSystems_Applications_ProcessControl_CascadeLevelControl_fmu --startTime=0 --stopTime=4500 --stepSize=1.8 --timeout=50 --tolerance=1e-06 IndustrialControlSystems_IndustrialControlSystems_Applications_ProcessControl_CascadeLevelControl.fmu > IndustrialControlSystems_IndustrialControlSystems.Applications.ProcessControl.CascadeLevelControl.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 17.649430165998638] Failed to read output from testmodel.py, exit status != 0: 15.152494142996147 15.167297237 14.803293536 Calling exit ...