ZiLOG Z80-RIO Operating System User's Manual page 149

OPEN
OPEN
DISK FULL (code 03) - there was no space to
allocate a descriptor record, or a new
directory record if one needed to be
allocated. Can only occur if the file is
being created.
FILE ALREADY OPEN (code 06) - the file
requested to be opened on this unit is already
active on another unit. The unit is not
activated.
PROPERTIES PROTECTION (code 08) - an attempt
to change attributes on a locked file. The
attributes are not changed.
INVALID OPEN REQUEST (code 09) - a type of
open request which was not input, output,
newfile, append, or update was specified. No
action is taken.
INSUFFICIENT MEMORY (code DA) - if additional
disks have been inserted prior to the open
request and insufficient memory is available
for additional allocation maps, this error
will be returned.
The following are
w~rning
codes, and will not cause
the error return branch to be taken.
DIRECTORY FORMAT ERROR (code 81) - Indicates
the format of one or more directory records is
erroneous. The record can still be read, but
its data is suspect.
SCRATCH FILE (code 82) - informative message
that a scratch file has been created.
ATTRIBUTES TOO LONG (code 84) - more than 116
bytes of attribute information were requested.
Only 116 bytes were transferred.
In addition, if an assign is implicit in
the open request, any error that can occur
with assign could occur.
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