IBM z/OS 2.1 compatibility issue

From m204wiki
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

In Model 204 versions 7.5 and lower, Horizon TCP applications sending data larger than 16K might get the following error:

M204.1254: User language statement is invalid in this conversation state

This error occurs under z/OS version 2.1 because the TCP Default Send Buffer Size (DefaultSndBufSize) was increased to 65536 (from 16384 in earlier versions).

The solutions are as follows:

  • Model 204 v7.5:
    Apply zap 75Z226.
  • Model 204 v7.4:
    Currently fixed by zap 74Z4552. Contact Technical Support.
  • Model 204 v7.1 (and lower):
    Workaround: Set z/OS 2.1 TCP DefaultSndBufSize to 16384.