[Wien] Exit code "0" for LAPW1 with an error

[Yundi Quan]

The simplest way that I can think of is to check whether the lawp1.error
file is empty or not after executing x lapw1. If it is empty after
executing 'x lapw1', then lapw1 terminates without any errors. If it is
not, then lapw1 terminates with error(s).

On Tue, Sep 8, 2020 at 2:23 PM Rubel, Oleg <rubelo at mcmaster.ca> wrote:

> Dear WIEN2k community,
>
> suppose we have a code that includes a sequence of commands. Before
> running the next command, I would like to check if the previous one
> completed successfully. It is convenient to use exit codes for that
> purpose. Here is a small example in bash (looking for a file that does not
> exist):
>
> [rubel at gra-login3 lambda1]$ ls oleg
> ls: cannot access 'oleg': No such file or directory
> [rubel at gra-login3 lambda1]$ echo $?
> 2
>
> Here "echo $?" returns the exit code of a previous command. If it is not
> "0", there is a problem (like in this case, there is no "oleg" file).
>
> Now I try to apply the same strategy to WIEN2k:
>
> [rubel at gra-login3 lambda1]$ x lapw1
> LAPW1 - Error
> 0.001u 0.018s 0:00.06 16.6%     0+0k 23592+16io 67pf+0w
> [rubel at gra-login3 lambda1]$ echo $?
> 0
>
> This is an unexpected result. The exist status is OK in spite of the fact
> that LAPW1 exited with an error. Of course, there are error files created
> for each program + spin up/dn (even process for parallel calculations). But
> it can be quite elaborate to search through them, and it depends on whether
> you run lapw1 or lapw2, etc.
>
> I wonder if there is a _simple_ alternative way for sensing an error? Also
> message is not always "XXXXX - Error". It can be different (e.g.,
> segmentation fault).
>
> Thank you in advance
> Oleg
>
> --
> Oleg Rubel (PhD, PEng)
> Department of Materials Science and Engineering
> McMaster University
> JHE 359, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
> Email: rubelo at mcmaster.ca
> Tel: +1-905-525-9140, ext. 24094
> Web: http://olegrubel.mcmaster
>
>
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