Where can I find FVWM's log files?

I got some crash and need to check the log file. Thanks

A crash with what? If it was a program within FVWM, you might be lucky and find any X11 output in ~/.xsession-errors. If you mean FVWM crashed, then you’ll have to examine the corefile for it.

– Thomas Adam

something usefull:

use “root-tail” for displaying the xsession-errors logfile on the root window.