How to catch MapdlExitedError

[imhsaq]

My code sometimes throws Exceptions of type MapdlExitedError.
I tried to catch them with try except-blocks, but that did not work as I supposed it should do.
When starting mapdl with launch_mapdl an empty toolbar-icon appears for the started Distributed Mechanical APDL application. When closing mapdl with mapdl.exit() this icon normally disappears.
My first understanding was:
MapdlExitedError closes mapdl like mapdl.exit() does, so I have to relaunch again.
But apparently the toolbar icon does not disappear and a new launch_mapdl-command opens a new one. The more icons I see, the longer is the time the new launch takes and I made the experience that too many open applications may make IDE crash.
I put these try except blocks inside loops and write the launch_mapdl command inside the exception block.
According to where the crash occurs, my idea was to set up the system again with the corresponding mapdl commands, so that for the next loop iteration I will get the correct input data.
But that does not seem to work. As said, all the icons in the toolbar stay open and I have to close all the tasks manually with the Windows Task Manager (see attached Word-file).
250207_MapdlExitedError.docx
As I have many iterations that might fail this is not feasible.
I even tried to explicitly exit by writing an mapdl.exit() command before the lauch_mapdl command, but that does not work either.

The structure is like this:

def fun_checkError(...):
    if-statements to check where error occurs:
       launch_mapdl
       execute necessary mapdl commands (according to if-statements) to set up the system again for next loop iteration

main:
launch_mapdl
try:
    execute some mapdl commands
    for loop1:  (this loop appears in a separate function)
        try:  
            execute mapdl commands
        except:
            fun_checkError
            pass

    execute some mapdl commands
    for loop2:  (this loop appears in a separate function)
        try:  
            execute mapdl commands
        except:
            fun_checkError
            pass
except:
    mapdl.exit()

In my last run the error occurred inside loop 1, the programme continued to run until the end of the loop, throwing MapdlExitedError at each iteration,
which were ignored according to the pass and then the first mapdl-command before loop2 (loading a rst-file), which never fails, ended up the programm with another
MapdlExitedError branching to the ultimate except
So I got no idea, how I could really catch a MapdlExitedError and continue my programme to run. Seemingly after the first MapdlExitedError thrown there is no way to catch it properly.
What is behind this error concept? Is there a strategy one should follow?

[saitade-bh]

from ansys.mapdl.core.errors import MapdlExitedError
Then catch the MapdlExitedError. What I would suggest is to put all your mapdl commands within a function and iterate the execution of function in your for loop. It's important to restart your mapdl instance after it has been exited by the error.
Example:

 mapdl = launch_mapdl()
 try:
         with mapdl.non_interactive:
            mapdl.run(f"/com, Running load case: {start_case}")
            mapdl.run(f"icase={start_case}")
 except MapdlExitedError:
         #rerun the function again after relaunching the mapdl instance again

[imhsaq]

I will try to rewrite my code with only one try/except-Block, but in principle I thought that's what I am doing. do an mapdl = launch_mapdl() after the error is thrown. I will it give it another try.

[imhsaq]

250213_Excerpt_Script.txt
I did an excerpt of my original script as attached.
In main I do calls to FUN__surAvgTemp and FUN__surAvgStress, Both do essentially the same, the one an averaging of temperature and the other of stresses respectively.
In their except-blocks they have a call to FUN__checkMapdlExitedError, where I try to reinitiate the state in case of error.
This function itself gets a call to FUN__setComponents. According to the problems I depicted in my other post I replaced calls to this functions by the code itself, but essentially this is my first code version, not yet rewritten.
In FUN__checkMapdlExitedError I check where the problem came from and reinitiate the state with a call to mapdl = launch_mapdl(
) and respective mapdl commands. I hoped that would do the trick and thus ended the except block with a pass command. But that did not work.
Perhaps I missed something essential.
Maybe the missing import:
from ansys.mapdl.core.errors import MapdlExitedError?
Or the missing
with mapdl.non_interactive:
at the beginning of the try-block in main?

[germa89]

@imhsaq Which version of PyMAPDL are you using??

[imhsaq]

Should be the newest ones:
ansys-api-mapdl 0.5.2
ansys-mapdl-core 0.69.2
ansys-mapdl-reader 0.54.2