open TELEMAC-MASCARET The mathematically superior suite of solvers

Dear friends：
I made the error "200 sub-iterations required for the distributed scheme. Decrease the time-step" during the simulation. I changed the time step and iteration times, but this error still occurred. How should I solve it? The following is the error message.

ITERATION 0 TIME: 0.0000 S
TELEMAC2D INITIALIZED
CVTRVF: 200 SUB-ITERATIONS REQUIRED FOR THE
DISTRIBUTIVE SCHEME. DECREASE THE TIME-STEP

PLANTE: PROGRAM STOPPED AFTER AN ERROR
RETURNING EXIT CODE: 2

job aborted:
[ranks] message

[0] application aborted
aborting MPI_COMM_WORLD (comm=0x44000000), error 2, comm rank 0

---- error analysis

---

[0] on DESKTOP-LOHM0PN
C:\TELEMAC\XPS_SMS_NEWCAS\XPS_steady_modified.cas_2024-08-10-10h50min04s\out_telemac2d.exe aborted the job. abort code 2

---- error analysis

---

Traceback (most recent call last):
File "C:\V8P4\scripts\python3\telemac2d.py", line 7, in <module>
main('telemac2d')
File "C:\V8P4\scripts\python3\runcode.py", line 288, in main
run_study(cas_file, code_name, options)
File "C:\V8P4\scripts\python3\execution\run_cas.py", line 169, in run_study
run_local_cas(my_study, options)
File "C:\V8P4\scripts\python3\execution\run_cas.py", line 65, in run_local_cas
my_study.run(options)
File "C:\V8P4\scripts\python3\execution\study.py", line 644, in run
self.run_local()
File "C:\V8P4\scripts\python3\execution\study.py", line 465, in run_local
run_code(self.run_cmd, self.sortie_file)
File "C:\V8P4\scripts\python3\execution\run.py", line 182, in run_code
raise TelemacException('Fail to run\n'+exe)
utils.exceptions.TelemacException: Fail to run
mpiexec -n 1 C:\TELEMAC\XPS_SMS_NEWCAS\XPS_steady_modified.cas_2024-08-10-10h50min04s\out_telemac2d.exe

First I'll estimate the CFL number (u*dt/dx) and make sure it's way below 1 . I'll start from that estimated dt and then keep reducing the time step until it runs.

Best of luck,
Jason

Hello,

Do you have dry areas?
If yes, please use advection schemes that are compatible with dry areas, not the N scheme e.g. (= 4). You can try the NERD (13 e.g.) or LIPS.
Please read the TELEMAC-2D user manual to have more explanations.

Hope this helps,

Chi-Tuan