OSI/AS Programming Manual

Error Codes
Status and Error Codes
B–20 056783 Tandem Computers Incorporated
Session Service Error
Codes
Table B-3 summarizes the error values you can receive only from the session service,
and explains what they mean. These errors can occur on session, presentation, or
ACSE connections, but they are always issued by the underlying session service. The
name of each value starts with ZAPS-ERR-L5-. A more detailed description of each
value follows the table in ascending numerical order.
Table B-3. Session Service Error Values
Constant (ZAPS-ERR-L5-) Value Meaning
ACT-IN-PROGRESS -1005 An activity is in progress
BAD-PI-UNIT-LENGTH -1006 Illegal length identifier in PI or PGI unit in SPDU
BAD-PI-UNIT-VAL -1009 Parameter value of PI or PGI unit bad
BAD-TRANS-MCW -1012 Bad transport message control word
BAD-TSDU-RECEIVED -1011 Bad TSDU received
COLLISION -1004 Resynchronization collision detected
EXTRANEOUS-PI-UNIT -1008 PI or PGI unit incorrectly included in SPDU
MISSING-PI-UNIT -1007 PI or PGI unit missing from SPDU
SEGM-NOT-SUPP -1010 Requires segmentation, not supported
TOKEN-STATE -1002 Request invalid with current token state
TRANS-FS-ERROR -1001 File-system error communicating with the transport
subdevice
VARIABLE-VAL -1003 Request invalid with value of session variable
For definitions of PI unit, PGI unit, SPDU, and TSDU, see the ISO session protocol standard, ISO
8327.
-1001: ZAPS-ERR-L5-TRANS-FS-ERROR
Cause. An error occurred during an attempt to communicate with the transport
process.
Subcodes. If your application was trying to establish a connection using the loopback
feature that allows you to bypass the Transport Layer, the subcodes shown in Table B-
10 apply. Otherwise, the subcode is the file-system error code. For descriptions of the
file-system errors, refer to the System Procedure Errors and Messages Manual.
Effect. The connection is lost.
Recovery. No recovery is possible.