Unable to start WRF4G

[donglx2018]

I successfully installed WRF4G using 'pip3 install wrf4g', but when I entered the command 'wrf4g start' in the terminal, it prompted an error message: 'Error! Lock file ~/.drm4g/var/.lock exists.' May I know what could be the reason for this?

[fernanqv]

Hello:

Every time you start WRF4G, it automatically initiates DRM4G (a tool responsible for process management). If you attempt to start WRF4G and DRM4G has not been properly stopped, WRF4G will not initiate.

In this situation, you first have to check that the DRM4G process has been stopped (ps -ef| grep drm4g). If it has, you can manually delete ~/.drm4g/var/.lock and then run WRF4G start again.

Kind regards
Valva

[cofinoa]

@fernanqv, DRM4G has a mechanism to check if LOCK file it's valid, and if not, it removes it:
https://github.com/cofinoa/DRM4G/blob/ff72e7c544795a050027088caa64883200227c8c/drm4g/commands/__init__.py#L246-L247

Which version of DRM4G is using WRF4G? Or is using its own LOCK file check?