Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep.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 0.001035/0.001035, allocations: 79.69 kB / 19.25 MB, free: 0.6211 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 0.0008029/0.0008029, allocations: 166.3 kB / 22.56 MB, free: 1.961 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 0.8966/0.8966, allocations: 177.1 MB / 202.9 MB, free: 5.73 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 0.5416/0.5416, 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.CO2TransportStep,fileNamePrefix="BuildSysPro_BuildSysPro_IBPSA_Airflow_Multizone_Examples_CO2TransportStep",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep,fileNamePrefix="BuildSysPro_BuildSysPro_IBPSA_Airflow_Multizone_Examples_CO2TransportStep",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.633e-06/1.633e-06, allocations: 0 / 0.5475 GB, free: 9.711 MB / 0.5105 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.794e-05/1.958e-05, allocations: 2.281 kB / 0.5475 GB, free: 9.707 MB / 0.5105 GB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep): time 0.4586/0.4586, allocations: 261.8 MB / 0.8032 GB, free: 9.125 MB / 0.6355 GB Notification: Performance of NFInst.instExpressions: time 0.0201/0.4787, allocations: 21.37 MB / 0.8241 GB, free: 11.09 MB / 0.6511 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003558/0.4823, allocations: 100.7 kB / 0.8242 GB, free: 11.04 MB / 0.6511 GB Notification: Performance of NFTyping.typeComponents: time 0.004284/0.4866, allocations: 1.734 MB / 0.8259 GB, free: 10.09 MB / 0.6511 GB Notification: Performance of NFTyping.typeBindings: time 0.01195/0.4985, allocations: 6.522 MB / 0.8322 GB, free: 6.586 MB / 0.6511 GB Notification: Performance of NFTyping.typeClassSections: time 0.005908/0.5044, allocations: 3.012 MB / 0.8352 GB, free: 5.016 MB / 0.6511 GB Notification: Performance of NFFlatten.flatten: time 0.007718/0.5122, allocations: 7.536 MB / 0.8425 GB, free: 0.6758 MB / 0.6511 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003003/0.5152, allocations: 2.142 MB / 0.8446 GB, free: 15.2 MB / 0.6667 GB Notification: Performance of NFEvalConstants.evaluate: time 0.006455/0.5216, allocations: 3.919 MB / 0.8484 GB, free: 12.87 MB / 0.6667 GB Notification: Performance of NFSimplifyModel.simplify: time 0.003969/0.5256, allocations: 2.562 MB / 0.8509 GB, free: 11.49 MB / 0.6667 GB Notification: Performance of NFPackage.collectConstants: time 0.0007132/0.5263, allocations: 345.9 kB / 0.8513 GB, free: 11.48 MB / 0.6667 GB Notification: Performance of NFFlatten.collectFunctions: time 0.008793/0.5351, allocations: 5.005 MB / 0.8562 GB, free: 8.719 MB / 0.6667 GB Notification: Performance of NFScalarize.scalarize: time 0.001761/0.5368, allocations: 1.585 MB / 0.8577 GB, free: 7.633 MB / 0.6667 GB Notification: Performance of NFVerifyModel.verify: time 0.002352/0.5392, allocations: 1.384 MB / 0.8591 GB, free: 6.445 MB / 0.6667 GB Notification: Performance of NFConvertDAE.convert: time 0.01189/0.5511, allocations: 7.25 MB / 0.8661 GB, free: 15.18 MB / 0.6823 GB Notification: Performance of FrontEnd - DAE generated: time 7.695e-06/0.5511, allocations: 0 / 0.8661 GB, free: 15.18 MB / 0.6823 GB Notification: Performance of FrontEnd: time 2.064e-06/0.5511, allocations: 0 / 0.8661 GB, free: 15.18 MB / 0.6823 GB Notification: Performance of Transformations before backend: time 0.0001256/0.5512, allocations: 0 / 0.8661 GB, free: 15.18 MB / 0.6823 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 709 * Number of variables: 709 Notification: Performance of Generate backend data structure: time 0.007024/0.5582, allocations: 4.104 MB / 0.8701 GB, free: 11.01 MB / 0.6823 GB Notification: Performance of prepare preOptimizeDAE: time 5.175e-05/0.5583, allocations: 8.031 kB / 0.8702 GB, free: 11 MB / 0.6823 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003627/0.5587, allocations: 396 kB / 0.8705 GB, free: 10.61 MB / 0.6823 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003111/0.5618, allocations: 0.8605 MB / 0.8714 GB, free: 9.742 MB / 0.6823 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0029/0.5647, allocations: 1.868 MB / 0.8732 GB, free: 7.824 MB / 0.6823 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001005/0.5648, allocations: 213.4 kB / 0.8734 GB, free: 7.613 MB / 0.6823 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002883/0.5651, allocations: 276 kB / 0.8737 GB, free: 7.344 MB / 0.6823 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.004316/0.5694, allocations: 3.927 MB / 0.8775 GB, free: 3.211 MB / 0.6823 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.406e-05/0.5694, allocations: 4 kB / 0.8775 GB, free: 3.207 MB / 0.6823 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0004243/0.5698, allocations: 112 kB / 0.8776 GB, free: 3.098 MB / 0.6823 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001017/0.5699, allocations: 145.3 kB / 0.8777 GB, free: 2.953 MB / 0.6823 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.004183/0.5741, allocations: 3.28 MB / 0.881 GB, free: 15.66 MB / 0.698 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 0.01104/0.5852, allocations: 9.095 MB / 0.8898 GB, free: 6.391 MB / 0.698 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002459/0.5876, allocations: 2.066 MB / 0.8919 GB, free: 4.336 MB / 0.698 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001275/0.5889, allocations: 1.247 MB / 0.8931 GB, free: 3.094 MB / 0.698 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004508/0.5894, allocations: 181.8 kB / 0.8932 GB, free: 2.918 MB / 0.698 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001404/0.5908, allocations: 1.557 MB / 0.8948 GB, free: 1.266 MB / 0.698 GB Notification: Performance of pre-optimization done (n=213): time 4.268e-06/0.5908, allocations: 0 / 0.8948 GB, free: 1.266 MB / 0.698 GB Notification: Performance of matching and sorting (n=213): time 0.003868/0.5946, allocations: 3.181 MB / 0.8979 GB, free: 14.08 MB / 0.7136 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.754e-05/0.5947, allocations: 77.39 kB / 0.8979 GB, free: 13.99 MB / 0.7136 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001439/0.5961, allocations: 1.46 MB / 0.8994 GB, free: 12.53 MB / 0.7136 GB Notification: Performance of collectPreVariables (initialization): time 0.0001225/0.5962, allocations: 69.69 kB / 0.8994 GB, free: 12.45 MB / 0.7136 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006601/0.5969, allocations: 1.141 MB / 0.9005 GB, free: 11.3 MB / 0.7136 GB Notification: Performance of collectInitialBindings (initialization): time 0.000514/0.5974, allocations: 0.7629 MB / 0.9013 GB, free: 10.54 MB / 0.7136 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003647/0.5978, allocations: 355.6 kB / 0.9016 GB, free: 10.18 MB / 0.7136 GB Notification: Performance of setup shared object (initialization): time 6.715e-05/0.5978, allocations: 301.1 kB / 0.9019 GB, free: 9.883 MB / 0.7136 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001046/0.5989, allocations: 0.9465 MB / 0.9028 GB, free: 8.926 MB / 0.7136 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001241/0.6001, allocations: 1.406 MB / 0.9042 GB, free: 7.359 MB / 0.7136 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.00235/0.6025, allocations: 2.321 MB / 0.9065 GB, free: 4.934 MB / 0.7136 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.518e-06/0.6025, allocations: 7.938 kB / 0.9065 GB, free: 4.926 MB / 0.7136 GB Notification: Performance of matching and sorting (n=259) (initialization): time 0.003149/0.6056, allocations: 2.635 MB / 0.9091 GB, free: 2.27 MB / 0.7136 GB Notification: Performance of prepare postOptimizeDAE: time 4.159e-05/0.6057, allocations: 37.7 kB / 0.9091 GB, free: 2.227 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.307e-05/0.6057, allocations: 8.781 kB / 0.9091 GB, free: 2.219 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.541e-05/0.6057, allocations: 18.69 kB / 0.9091 GB, free: 2.203 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001066/0.6068, allocations: 471.3 kB / 0.9096 GB, free: 1.742 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.018e-05/0.6068, allocations: 19.94 kB / 0.9096 GB, free: 1.723 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001259/0.6081, allocations: 198.5 kB / 0.9098 GB, free: 1.527 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001031/0.6082, allocations: 75.98 kB / 0.9099 GB, free: 1.453 MB / 0.7136 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 33 * Number of states: 0 () * Number of discrete variables: 5 (pulse.count,$PRE.pulse.count,pulse.T_start,$PRE.pulse.T_start,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (258): * Single equations (assignments): 257 * Array equations: 0 * Algorithm blocks: 1 * 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 0.0009969/0.6092, allocations: 0.6955 MB / 0.9105 GB, free: 0.75 MB / 0.7136 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002735/0.6094, allocations: 226.6 kB / 0.9108 GB, free: 0.5273 MB / 0.7136 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002809/0.6123, allocations: 2.517 MB / 0.9132 GB, free: 13.99 MB / 0.7292 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.221e-05/0.6123, allocations: 28 kB / 0.9132 GB, free: 13.96 MB / 0.7292 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.633e-06/0.6123, allocations: 0 / 0.9132 GB, free: 13.96 MB / 0.7292 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002199/0.6145, allocations: 2.331 MB / 0.9155 GB, free: 11.57 MB / 0.7292 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006007/0.6205, allocations: 5.119 MB / 0.9205 GB, free: 6.363 MB / 0.7292 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.294e-06/0.6205, allocations: 4 kB / 0.9205 GB, free: 6.359 MB / 0.7292 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001187/0.6217, allocations: 483.6 kB / 0.921 GB, free: 5.887 MB / 0.7292 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.006e-05/0.6217, allocations: 8 kB / 0.921 GB, free: 5.879 MB / 0.7292 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 9.591e-05/0.6218, allocations: 55.97 kB / 0.921 GB, free: 5.824 MB / 0.7292 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 9.077e-06/0.6218, allocations: 12 kB / 0.9211 GB, free: 5.812 MB / 0.7292 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.795e-06/0.6218, allocations: 3.938 kB / 0.9211 GB, free: 5.809 MB / 0.7292 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004069/0.6259, allocations: 3.803 MB / 0.9248 GB, free: 1.957 MB / 0.7292 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0009626/0.6268, allocations: 490 kB / 0.9252 GB, free: 1.477 MB / 0.7292 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001886/0.627, allocations: 40 kB / 0.9253 GB, free: 1.438 MB / 0.7292 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007546/0.6278, allocations: 76.14 kB / 0.9253 GB, free: 1.367 MB / 0.7292 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002185/0.628, allocations: 149.7 kB / 0.9255 GB, free: 1.223 MB / 0.7292 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.072e-05/0.6281, allocations: 71.97 kB / 0.9256 GB, free: 1.152 MB / 0.7292 GB Notification: Performance of sorting global known variables: time 0.0009696/0.629, allocations: 0.9943 MB / 0.9265 GB, free: 168 kB / 0.7292 GB Notification: Performance of sort global known variables: time 1.81e-07/0.629, allocations: 0 / 0.9265 GB, free: 168 kB / 0.7292 GB Notification: Performance of remove unused functions: time 0.001618/0.6307, allocations: 0.9434 MB / 0.9275 GB, free: 15.22 MB / 0.7448 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 16 (volEas.dynBal.medium.Xi[1],volEas.dynBal.U,volEas.dynBal.m,volEas.dynBal.mC[1],oriOutBot.mExc,oriOutTop.mExc,oriWesTop.mExc,volWes.dynBal.medium.Xi[1],volWes.dynBal.U,volWes.dynBal.m,volWes.dynBal.mC[1],oriEasTop.mExc,volTop.dynBal.medium.Xi[1],volTop.dynBal.U,volTop.dynBal.m,volTop.dynBal.mC[1]) * Number of discrete variables: 3 ($whenCondition1,pulse.T_start,pulse.count) * Number of discrete states: 1 (pulse.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (217): * Single equations (assignments): 215 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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 0.004285/0.6349, allocations: 4.621 MB / 0.932 GB, free: 10.55 MB / 0.7448 GB Notification: Performance of simCode: created initialization part: time 0.002667/0.6376, allocations: 2.261 MB / 0.9342 GB, free: 8.27 MB / 0.7448 GB Notification: Performance of simCode: created event and clocks part: time 4.999e-06/0.6376, allocations: 0 / 0.9342 GB, free: 8.27 MB / 0.7448 GB Notification: Performance of simCode: created simulation system equations: time 0.001237/0.6389, allocations: 1.144 MB / 0.9353 GB, free: 7.125 MB / 0.7448 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003349/0.6422, allocations: 1.288 MB / 0.9365 GB, free: 5.859 MB / 0.7448 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02053/0.6627, allocations: 18.49 MB / 0.9546 GB, free: 2.848 MB / 0.7605 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001135/0.6639, allocations: 1.411 MB / 0.956 GB, free: 1.395 MB / 0.7605 GB Notification: Performance of simCode: alias equations: time 0.001933/0.6658, allocations: 0.7248 MB / 0.9567 GB, free: 0.668 MB / 0.7605 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001142/0.6669, allocations: 1.098 MB / 0.9578 GB, free: 15.57 MB / 0.7761 GB Notification: Performance of SimCode: time 1.233e-06/0.6669, allocations: 0 / 0.9578 GB, free: 15.57 MB / 0.7761 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.3067/0.9736, allocations: 71.63 MB / 1.028 GB, free: 283.9 MB / 0.7761 GB Notification: Performance of buildModelFMU: Generate platform static: time 8.652/9.626, allocations: 7.578 kB / 1.028 GB, free: 283.9 MB / 0.7761 GB " [Timeout remaining time 650] (rm -f BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep.sim & python3 -m fmpy simulate --output-file BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep_res.csv --start-time 0 --stop-time 86400 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 34.56 BuildSysPro_BuildSysPro_IBPSA_Airflow_Multizone_Examples_CO2TransportStep.fmu > BuildSysPro_BuildSysPro.IBPSA.Airflow.Multizone.Examples.CO2TransportStep.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 12.22133825905621] Failed to read output from testmodel.py, exit status != 0: 9.738405768759549 9.744466231 9.191745241 Calling exit ...