Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.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 0.0009095/0.0009095, allocations: 80.44 kB / 19.17 MB, free: 0.7422 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 0.001153/0.001153, allocations: 169.9 kB / 22.46 MB, free: 2.102 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 0.8856/0.8856, allocations: 177.1 MB / 202.8 MB, free: 5.738 MB / 186.7 MB " [Timeout remaining time 179] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 master/package.mo): time 0.002169/0.002169, allocations: 231.1 kB / 259.4 MB, free: 13.02 MB / 250.7 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/package.mo): time 0.6771/0.6771, allocations: 138.4 MB / 454.3 MB, free: 29.95 MB / 410.7 MB " [Timeout remaining time 179] Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 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(BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate,fileNamePrefix="BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate,fileNamePrefix="BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: Performance of FrontEnd - loaded program: time 1.443e-06/1.443e-06, allocations: 0 / 0.6463 GB, free: 1.84 MB / 0.5573 GB Notification: Performance of FrontEnd - Absyn->SCode: time 1.399e-05/1.543e-05, allocations: 2.281 kB / 0.6463 GB, free: 1.836 MB / 0.5573 GB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate): time 0.3425/0.3425, allocations: 168.3 MB / 0.8107 GB, free: 2.703 MB / 0.6355 GB Notification: Performance of NFInst.instExpressions: time 0.006406/0.3489, allocations: 5.441 MB / 0.816 GB, free: 13.25 MB / 0.6511 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0007209/0.3496, allocations: 55.56 kB / 0.8161 GB, free: 13.2 MB / 0.6511 GB Notification: Performance of NFTyping.typeComponents: time 0.001031/0.3507, allocations: 0.5627 MB / 0.8166 GB, free: 12.63 MB / 0.6511 GB Notification: Performance of NFTyping.typeBindings: time 0.002606/0.3533, allocations: 1.729 MB / 0.8183 GB, free: 10.89 MB / 0.6511 GB Notification: Performance of NFTyping.typeClassSections: time 0.002036/0.3553, allocations: 1.274 MB / 0.8196 GB, free: 9.625 MB / 0.6511 GB Notification: Performance of NFFlatten.flatten: time 0.002271/0.3576, allocations: 2.646 MB / 0.8221 GB, free: 6.969 MB / 0.6511 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0007981/0.3584, allocations: 0.6826 MB / 0.8228 GB, free: 6.281 MB / 0.6511 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00154/0.3599, allocations: 1.402 MB / 0.8242 GB, free: 4.875 MB / 0.6511 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001119/0.361, allocations: 0.7674 MB / 0.8249 GB, free: 4.117 MB / 0.6511 GB Notification: Performance of NFPackage.collectConstants: time 0.000113/0.3612, allocations: 96 kB / 0.825 GB, free: 4.023 MB / 0.6511 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001768/0.3629, allocations: 1.293 MB / 0.8263 GB, free: 2.727 MB / 0.6511 GB Notification: Performance of NFScalarize.scalarize: time 0.0002838/0.3632, allocations: 446.6 kB / 0.8267 GB, free: 2.289 MB / 0.6511 GB Notification: Performance of NFVerifyModel.verify: time 0.0003074/0.3635, allocations: 423 kB / 0.8271 GB, free: 1.875 MB / 0.6511 GB Notification: Performance of NFConvertDAE.convert: time 0.001685/0.3652, allocations: 2.072 MB / 0.8291 GB, free: 15.8 MB / 0.6667 GB Notification: Performance of FrontEnd - DAE generated: time 3.958e-06/0.3652, allocations: 4 kB / 0.8291 GB, free: 15.8 MB / 0.6667 GB Notification: Performance of FrontEnd: time 1.793e-06/0.3652, allocations: 0 / 0.8291 GB, free: 15.8 MB / 0.6667 GB Notification: Performance of Transformations before backend: time 1.379e-05/0.3652, allocations: 0 / 0.8291 GB, free: 15.8 MB / 0.6667 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 187 * Number of variables: 187 Notification: Performance of Generate backend data structure: time 0.001467/0.3667, allocations: 1.38 MB / 0.8305 GB, free: 14.38 MB / 0.6667 GB Notification: Performance of prepare preOptimizeDAE: time 4.113e-05/0.3667, allocations: 16.73 kB / 0.8305 GB, free: 14.36 MB / 0.6667 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001099/0.3668, allocations: 122.6 kB / 0.8306 GB, free: 14.23 MB / 0.6667 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001301/0.3681, allocations: 422.9 kB / 0.831 GB, free: 13.82 MB / 0.6667 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008894/0.369, allocations: 0.7285 MB / 0.8317 GB, free: 13.06 MB / 0.6667 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.65e-05/0.3691, allocations: 61.94 kB / 0.8318 GB, free: 13 MB / 0.6667 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.02e-05/0.3691, allocations: 72 kB / 0.8319 GB, free: 12.93 MB / 0.6667 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001193/0.3703, allocations: 1.355 MB / 0.8332 GB, free: 11.46 MB / 0.6667 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.754e-05/0.3704, allocations: 4 kB / 0.8332 GB, free: 11.46 MB / 0.6667 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.64e-05/0.3704, allocations: 35.94 kB / 0.8332 GB, free: 11.43 MB / 0.6667 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.539e-05/0.3704, allocations: 26 kB / 0.8332 GB, free: 11.4 MB / 0.6667 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001215/0.3717, allocations: 0.8743 MB / 0.8341 GB, free: 10.52 MB / 0.6667 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 0.003301/0.375, allocations: 2.767 MB / 0.8368 GB, free: 7.691 MB / 0.6667 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0008519/0.3758, allocations: 0.5897 MB / 0.8374 GB, free: 7.094 MB / 0.6667 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000407/0.3762, allocations: 314.8 kB / 0.8377 GB, free: 6.785 MB / 0.6667 GB Notification: Performance of preOpt evalFunc (simulation): time 9.752e-05/0.3763, allocations: 24.31 kB / 0.8377 GB, free: 6.762 MB / 0.6667 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.43e-05/0.3763, allocations: 51.14 kB / 0.8377 GB, free: 6.703 MB / 0.6667 GB Notification: Performance of pre-optimization done (n=39): time 1.403e-06/0.3763, allocations: 3.938 kB / 0.8378 GB, free: 6.699 MB / 0.6667 GB Notification: Performance of matching and sorting (n=41): time 0.003968/0.3803, allocations: 2.241 MB / 0.8399 GB, free: 4.422 MB / 0.6667 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.947e-05/0.3803, allocations: 59.41 kB / 0.84 GB, free: 4.352 MB / 0.6667 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005997/0.3809, allocations: 0.8057 MB / 0.8408 GB, free: 3.539 MB / 0.6667 GB Notification: Performance of collectPreVariables (initialization): time 3.693e-05/0.381, allocations: 33.7 kB / 0.8408 GB, free: 3.5 MB / 0.6667 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002203/0.3812, allocations: 460.5 kB / 0.8413 GB, free: 3.047 MB / 0.6667 GB Notification: Performance of collectInitialBindings (initialization): time 9.158e-05/0.3813, allocations: 150.6 kB / 0.8414 GB, free: 2.898 MB / 0.6667 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001242/0.3814, allocations: 110.3 kB / 0.8415 GB, free: 2.785 MB / 0.6667 GB Notification: Performance of setup shared object (initialization): time 7.656e-05/0.3815, allocations: 322 kB / 0.8418 GB, free: 2.465 MB / 0.6667 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004202/0.3819, allocations: 305.1 kB / 0.8421 GB, free: 2.164 MB / 0.6667 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004767/0.3824, allocations: 452.5 kB / 0.8425 GB, free: 1.672 MB / 0.6667 GB Warning: It was not possible to determine if the initialization problem is consistent, because of not evaluable parameters/start values during compile time: volDyn.dynBal.medium.p = volDyn.dynBal.p_start (bou.p = volDyn.dynBal.p_start) Notification: Performance of analyzeInitialSystem (initialization): time 0.002843/0.3852, allocations: 1.814 MB / 0.8443 GB, free: 15.83 MB / 0.6823 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.235e-06/0.3852, allocations: 0 / 0.8443 GB, free: 15.83 MB / 0.6823 GB Notification: Performance of matching and sorting (n=63) (initialization): time 0.00157/0.3868, allocations: 1.036 MB / 0.8453 GB, free: 14.79 MB / 0.6823 GB Notification: Performance of prepare postOptimizeDAE: time 1.565e-05/0.3868, allocations: 8 kB / 0.8453 GB, free: 14.78 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.404e-06/0.3868, allocations: 4 kB / 0.8453 GB, free: 14.77 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0003255/0.3871, allocations: 197.6 kB / 0.8455 GB, free: 14.58 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000331/0.3875, allocations: 135.8 kB / 0.8456 GB, free: 14.45 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002062/0.3895, allocations: 2.099 MB / 0.8477 GB, free: 12.24 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003848/0.3899, allocations: 56.72 kB / 0.8478 GB, free: 12.19 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.727e-05/0.39, allocations: 23.98 kB / 0.8478 GB, free: 12.16 MB / 0.6823 GB Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization system: volDyn.dynBal.medium.p = volDyn.dynBal.p_start. Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 12 * 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 (59): * Single equations (assignments): 58 * 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 {(1,4)} Notification: Performance of prepare postOptimizeDAE: time 0.0002578/0.3902, allocations: 272.9 kB / 0.848 GB, free: 11.89 MB / 0.6823 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 8.821e-05/0.3903, allocations: 95.44 kB / 0.8481 GB, free: 11.8 MB / 0.6823 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 9.88e-05/0.3904, allocations: 107.3 kB / 0.8482 GB, free: 11.69 MB / 0.6823 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.554e-06/0.3904, allocations: 8 kB / 0.8482 GB, free: 11.68 MB / 0.6823 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.053e-06/0.3904, allocations: 0 / 0.8482 GB, free: 11.68 MB / 0.6823 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001383/0.3918, allocations: 0.8873 MB / 0.8491 GB, free: 10.76 MB / 0.6823 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002651/0.3944, allocations: 1.941 MB / 0.851 GB, free: 8.723 MB / 0.6823 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.489e-06/0.3944, allocations: 4 kB / 0.851 GB, free: 8.719 MB / 0.6823 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002961/0.3947, allocations: 128 kB / 0.8511 GB, free: 8.594 MB / 0.6823 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002764/0.395, allocations: 188.7 kB / 0.8513 GB, free: 8.406 MB / 0.6823 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.613e-05/0.395, allocations: 15.94 kB / 0.8513 GB, free: 8.391 MB / 0.6823 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001844/0.3969, allocations: 2.064 MB / 0.8533 GB, free: 6.219 MB / 0.6823 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.775e-06/0.3969, allocations: 4.031 kB / 0.8533 GB, free: 6.215 MB / 0.6823 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001948/0.3988, allocations: 1.414 MB / 0.8547 GB, free: 4.742 MB / 0.6823 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002267/0.3991, allocations: 163.3 kB / 0.8549 GB, free: 4.582 MB / 0.6823 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.111e-05/0.3991, allocations: 15.94 kB / 0.8549 GB, free: 4.566 MB / 0.6823 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003887/0.3995, allocations: 62.59 kB / 0.8549 GB, free: 4.508 MB / 0.6823 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 6.782e-05/0.3996, allocations: 39.88 kB / 0.855 GB, free: 4.469 MB / 0.6823 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.214e-05/0.3996, allocations: 29.39 kB / 0.855 GB, free: 4.441 MB / 0.6823 GB Notification: Performance of sorting global known variables: time 0.0004357/0.4001, allocations: 0.5536 MB / 0.8556 GB, free: 3.895 MB / 0.6823 GB Notification: Performance of sort global known variables: time 8e-08/0.4001, allocations: 0 / 0.8556 GB, free: 3.895 MB / 0.6823 GB Notification: Performance of remove unused functions: time 0.0005198/0.4006, allocations: 283.9 kB / 0.8558 GB, free: 3.617 MB / 0.6823 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 14 * Number of states: 2 (volDyn.dynBal.medium.Xi[1],volDyn.dynBal.U) * 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 (37): * Single equations (assignments): 36 * 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 {(1,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002519/0.4031, allocations: 2.047 MB / 0.8578 GB, free: 1.504 MB / 0.6823 GB Notification: Performance of simCode: created initialization part: time 0.001107/0.4042, allocations: 0.7821 MB / 0.8586 GB, free: 0.707 MB / 0.6823 GB Notification: Performance of simCode: created event and clocks part: time 3.196e-06/0.4042, allocations: 0.5 kB / 0.8586 GB, free: 0.707 MB / 0.6823 GB Notification: Performance of simCode: created simulation system equations: time 0.0004985/0.4047, allocations: 456.4 kB / 0.859 GB, free: 256 kB / 0.6823 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001313/0.406, allocations: 0.5502 MB / 0.8596 GB, free: 15.74 MB / 0.698 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008607/0.4146, allocations: 7.617 MB / 0.867 GB, free: 7.832 MB / 0.698 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003072/0.4149, allocations: 458.5 kB / 0.8674 GB, free: 7.359 MB / 0.698 GB Notification: Performance of simCode: alias equations: time 0.0004808/0.4154, allocations: 195.2 kB / 0.8676 GB, free: 7.164 MB / 0.698 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003033/0.4157, allocations: 324.4 kB / 0.8679 GB, free: 6.848 MB / 0.698 GB Notification: Performance of SimCode: time 1.022e-06/0.4157, allocations: 0 / 0.8679 GB, free: 6.848 MB / 0.698 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03861/0.4543, allocations: 30.34 MB / 0.8976 GB, free: 9.25 MB / 0.7292 GB Notification: Performance of buildModelFMU: Generate platform static: time 8.377/8.832, allocations: 11.92 kB / 0.8976 GB, free: 9.238 MB / 0.7292 GB " [Timeout remaining time 651] (rm -f BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.sim & python3 -m fmpy simulate --output-file BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate_res.csv --start-time 0 --stop-time 10 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.004 BuildingSystems_BuildingSystems_Fluid_MixingVolumes_Validation_MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.fmu > BuildingSystems_BuildingSystems.Fluid.MixingVolumes.Validation.MixingVolumeHeatReverseFlowPrescribedHeatFlowRate.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 11.526150609366596] Failed to read output from testmodel.py, exit status != 0: 8.934577383100986 8.947011879 8.579810642 Calling exit ...