When adding an UID to a user via:
TSS ADD(xxxxx) UID(nn)
the following message is received:
TSS0323E RESOURCE SECURITY FILE SEGMENT IS FULL
The RESOURCE segment of the security file is full. New security files (BDAM and VSAM) need to be allocated with a larger number of RESBLOCKS. Then TSSXTEND needs to be run to to copy the old security files (BDAM and VSAM) into the new security file.
Please see Copy the BDAM and VSAM Files for information on copying the security file.
TSSFAR with SFSTATS can be run to see if any other segments (ie SDT blocks, ACCESSORS, etc) are almost full.