LOGP and Changes to lapdm.c and lapdm.h

Good evening all or whatever time it is there! 1. For debugging I have added a FILE* opf; member to lapdm_entity struct in lapdm.h But when I try to initialize this file pointer in mobile_init function in app_mobile.c I get a compile time error that lapdm_entity does not have a member named 'opf'. 2. When I declare the same member in osmocom_ms struct I don't get this error. 3. Furthermore, any changes I make to lapdm.c don't show up on runtime. I can quote specific examples but the mail would get long. Lastly is there any documentation on for LOGP and how to see it's different log levels. Regards, Arslan