The name of the tape file itself is quite irrelevant to the processing of the files on tape. It is the Tape Label field in the CRTTAPF command that is significant. As we are updating a file on tape, both the input file (TAPFIL) and the output file (TAPFIL2) have the same File Label (TAPEFILXMP).
Create Tape File (CRTTAPF)
Type choices, press Enter.
File . . . . . . . . . . . . . . TAPFIL Name
Library . . . . . . . . . . . BRMTAPF Name, *CURLIB
Tape device . . . . . . . . . . *NONE Name, *NONE
+ for more values
Volume identifier . . . . . . . *NONE Character value, *NONE
+ for more values
Tape reels specifications:
Label processing type . . . . *SL *SL, *NL, *NS, *BLP, *LTM
Number of reels . . . . . . . 1 1-255
Sequence number . . . . . . . . 1 1-16777215, *END, *NEXT
Tape label . . . . . . . . . . . TAPEFILXMP
File type . . . . . . . . . . . *DATA *DATA, *SRC
Text 'description' . . . . . . . Tape File Example
Bottom
F3=Exit F4=Prompt F5=Refresh F10=Additional parameters F12=Cancel
F13=How to use this display F24=More keys
Create Tape File (CRTTAPF)
Type choices, press Enter.
File . . . . . . . . . . . . . . TAPFIL2 Name
Library . . . . . . . . . . . BRMTAPF Name, *CURLIB
Tape device . . . . . . . . . . *NONE Name, *NONE
+ for more values
Volume identifier . . . . . . . *NONE Character value, *NONE
+ for more values
Tape reels specifications:
Label processing type . . . . *SL *SL, *NL, *NS, *BLP, *LTM
Number of reels . . . . . . . 1 1-255
Sequence number . . . . . . . . 1 1-16777215, *END, *NEXT
Tape label . . . . . . . . . . . TAPEFILXMP
File type . . . . . . . . . . . *DATA *DATA, *SRC
Text 'description' . . . . . . . Tape File Example
Bottom
F3=Exit F4=Prompt F5=Refresh F10=Additional parameters F12=Cancel
F13=How to use this display F24=More keys