IBM Professional Series User Manual page 318

Files do not compare (DMS209W)
The two files you requested to be compared did not
match on a line for line, column for column basis.
FLASH MISSING OR INV ALID (DMK243E)
You did not enter the FLASH operand or you entered it
incorrectly. It is incorrect if it contains nondecimal digits
or is larger than 255.
FNAME FTYPE MISSING OR INVALID (DMK029E)
You did not enter a filename or filename and filetype, or
you entered it incorrectly. It is incorrect if the filename
is larger than 24 characters, or if the filetype is larger
than eight characters when the filename is eight
characters or less.
FORM NUMBER MISSING OR INVALID (DMK024E)
You did not enter a form number after the FORM
keyword or entered one longer than eight characters.
Format will erase all files on disk 'mode(cuu)'. Do you wish to
continue? (yes
I
no): (DMS603R)
You have requested a FORMAT of the cuu disk. This
prompt allows you to change your mind, in case you have
made a typing error, or decided that the FORMAT
should not be done at this time. You should reply yes if
you wish the format to continue or the FORMAT will
stop without changing the disk.
Formatting disk 'mode' (DMS733I)
The FORMAT command is formatting the specified disk.
H
HEXLOC hexloc EXCEEDS STORAGE (DMK160E)
The hexadecimal location you entered exceeds your
virtual machine storage size.
Chapter 8. VM/PC Messages 8-15