Buildings.Examples.DualFanDualDuct.ClosedLoop
The simulation fails with the cvode solver.
If the solver is changed to dassl, the simulation succeeds, but takes about 380 seconds.
For comparison, with Dymola 2022x and Radau, 1E-6, simulation takes 4 seconds; if changed to cvode, the simulation fails at time = 19873.6; if changed to dassl, the simulation hangs around time = 19800.
| Model | Buildings.Examples.DualFanDualDuct.ClosedLoop |
| Tool | OpenModelica OpenModelica 1.19.0~dev-613-gd6e04c0 |
| OS | Linux Ubuntu 20.04 |
| Status | open |
| Setup |
git clone git@github.com:lbl-srg/modelica-buildings.git git checkout d538de534a6f6c19311d70efb664ffdf6f5ca6a6 |
| Command |
cd modelica-buildings omc openmod.mos |
| Files |
openmod.mos
setCommandLineOptions("-d=nogen");
setCommandLineOptions("-d=initialization");
setCommandLineOptions("-d=backenddaeinfo");
setCommandLineOptions("-d=discreteinfo");
setCommandLineOptions("-d=stateselection");
setMatchingAlgorithm("PFPlusExt");
setIndexReductionMethod("dynamicStateSelection");
loadFile("Buildings/package.mo");
translateModel(Buildings.Examples.DualFanDualDuct.ClosedLoop, method="cvode", tolerance=1e-06, numberOfIntervals=500);
getErrorString();
system("make -f Buildings.Examples.DualFanDualDuct.ClosedLoop.makefile");
system("./Buildings.Examples.DualFanDualDuct.ClosedLoop -s cvode -steps -cpu -lv LOG_STATS");
|
| Log message |
[CVODE ERROR] CVode At t = 19894.3, mxstep steps taken before reaching tout. stdout | info | ##CVODE## -1 error occurred at time = 19894.3009912866 stdout | info | model terminate | Integrator failed. | Simulation terminated at time 19894.3 LOG_STATS | info | ### STATISTICS ### | | | | | timer | | | | | | 0.797688s reading init.xml | | | | | | 0.0651169s reading info.xml | | | | | | 0.0349142s [ 1.8%] pre-initialization | | | | | | 0.0996235s [ 5.2%] initialization | | | | | | 1.13512s [ 59.0%] steps | | | | | | 0.494772s [ 25.7%] solver (excl. callbacks) | | | | | | 0.0318s [ 1.7%] creating output-file | | | | | | 0.00117857s [ 0.1%] event-handling | | | | | | 0.00172706s [ 0.1%] overhead | | | | | | 0.1258s [ 6.5%] simulation | | | | | | 1.92494s [100.0%] total | | | | | events | | | | | | 3 state events | | | | | | 0 time events | | | | | solver: cvode | | | | | | 1424 steps taken | | | | | | 1859 calls of functionODE | | | | | | 37 evaluations of jacobian | | | | | | 30 error test failures | | | | | | 5 convergence test failures | | | | | | 0s time of jacobian evaluation |