Commodore 128 System Manual page 374

61: FILE NOT OPEN
This message is generated when a file is being
accessed that has not been opened in the DOS.
Sometimes, in this case, a message is not
generated; the request is simply ignored.
62: FILE NOT FOUND
The requested file does not exist on the
indicated drive.
63: FILE EXISTS
The file name of the file being created already
exists on the diskette.
64: FILE TYPE MISMATCH
The requested file access is not possible using
files of the type named. Reread the chapter
covering that file type.
65: NO BLOCK
Occurs in conjunction with Block Allocation. The
sector you tried to allocate is already allocated.
The track and sector numbers returned are the
next higher track and sector available. If the
track number returned is zero (0), all remaining
sectors are full. If the diskette is not full
yet, try a lower track and sector.
66: ILLEGAL TRACK AND SECTOR
The DOS has attempted to access a track or block
which does not exist in the format being used.
This may indicate a problem reading the pointer
of the next block.
67: ILLEGAL SYSTEM T OR S
This special error message indicates an illegal
system track or sector.
70: NO CHANNEL (available)
The requested channel is not available, or all
channels are in use. A maximum of five buffers
are available for use. A sequential file requires
two buffers; a relative file requires three
buffers; and the error/com m and channel requires
one buffer. You may use any combination of
those as long as the combination does not exceed
five buffers.
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