CP6100 I/O Process Programming Manual

File System Error Codes
----------------------------------------------------------------
THESE ARE SERIOUS. DON'T RETRY.
----------------------------------------------------------------
2 Invalid operation requested. You probably issued a
call CP6100 doesn't support. Remember to use
WRITEREADs for all requests to the line.
----------------------------------------------------------------
12 Device has been opened exclusively. The device is
in use by another application. If other
applications use the line, or if your application
opens the line more than once, make sure you specify
shared access in every OPEN call. If another
application has the line open exclusively, you must
wait until that application closes the line.
----------------------------------------------------------------
14 Device does not exist. The line you named is not
known to the system. Check your spelling, and make
sure the name is properly qualified, i.e., that the
system name is correct.
----------------------------------------------------------------
21 Invalid count field in request. This message can
mean that:
• The READ or WRITEREAD buffer is too small. It
must be at least eight bytes long.
• The write count parameter in the WRITEREAD call
is not equal to the value in the Textout field
plus 8.
• The read count parameter in the WRITEREAD call
is not at least equal to the value in the Textin
field plus 8.
• The protocol task made an error in its response
to CP6100, by delivering more or fewer characters
than it said it was delivering, or by reporting a
frame size that doesn't match the application
request.
First check your program to see that your file
system call was valid. If you suspect the protocol
task to be at fault, ask the system operator to stop
the line and download the line interface unit. If
the problem persists, contact your Tandem
representative.
----------------------------------------------------------------
A-5