Envoy ACP/XF Application Programming Manual
File-System Errors
EnvoyACP/XF Application Programming Manual–132179
A-2
12 all File in use. Check your program and recode if 
necessary. Possible causes are 
misspelling in the code, wrong line 
specified, or multiple lines opened 
for exclusive access. This error could 
also be an operation error.
21 all Illegal read count or 
write count 
specification.
Supply proper count with the READ, 
WRITE, or WRITEREAD request.
28 all 15 nowait I/O requests are 
already pending.
Wait until at least one I/O request 
completes, then reissue the call.
31 all Unable to obtain buffer 
space.
Wait and retry operation. If the 
problem persists, contact the Tandem 
representative.
33 all  Unable to obtain I/O segment 
space.
Wait and retry operation. If the 
problem persists, contact the Tandem 
representative.
53 all File-System internal error. Contact the Tandem representative.
60 all Wrong request ID. Close file and reopen.
66 all Line (device, unit) is down. Requires operator intervention.
100 all Line (device, unit) is not 
powered up.
May be application error; that is, the 
device might not have been 
addressed correctly. Or, this error 
may require operator intervention.
121 SDLC Data overrun. READ request 
too small.
Reissue READ with larger data size 
request.
122 all SABM, SABME, SIM, or 
RSET received, or switch 
from primary cpu occurred 
(possible data loss).
Stations must again perform 
appropriate operation mode 
initialization (SNRM or SABM).
See “Error Recovery and Fault-
Tolerant Operation” in this appendix 
for details.
140 all Modem disconnected or 
inoperable; link is down.
Requires operator intervention. 
Sometimes this error occurs before or 
instead of a timeout error (error 162).
152 all  The I/O request has been 
cancelled.
Wait and retry operation. If the 
problem persists, contact the Tandem 
representative.
157 all Problem allocating or 
deallocating memory.
Wait and retry operation. If the 
problem persists, contact the Tandem 
representative.
Table A-1. Summary of Errors (page 2 of 4)
File-
System
Error
Relevant
Protocol Description Recovery










