can anyone please explain to me what does this error mean?
ISPSTART PGM(DSQQMFE) NEWAPPL PARM(F=999999,M=B,S=DSND, I=KMSDBA.PROMQMF (&&TYPE=QUERY &&DB2SRC=U123730 &&DB2OWNER=BCD75DBA &&INFO=D
EF-677946))
ISPT024 Error on input/output -/-Unexpected return code 5 from CDG/CDP. RC=13 implies disk full.
READY
END
The documentation indicates this is an I/O problem with an ISPF table (not a DB2 table, I see you're trying to start QMF).
The user response is to contact your systems programmer - in this case that would be the person responsible for this ISPF dialog. If that person is you, I suggest looking into the location of the applicable dataset in your ISPTLIB concatenation and checking with your storage administrator on how much space is available on that volume.