Due to other circumstances, the physical size of the non-virtual CBS Heuristics index (IXX1006) needed to be enlarged and switched to a different, larger data set.
Attempt to run DBUTLTY to rebuild the index via RETIX failed with RC 46
z/OS Datacom 15.1
RETIX failed with RC 46 since base 1006 was open in MUF via the MUF startup option CBS specifying the CBS heuristic DBID 1006.
For example:
CBS 6,2M,0,0,16,1006
From the documentation:
Note: Do not specify the CBS MUF startup option when you specify YES for the LIMITED_INSTALL_MUF MUF startup option. LIMITED_INSTALL_MUF YES prevents the CBS temporary index from being automatically opened.