Model 204 system requirements
Model 204 Release V7.5
Release V7.5 is supported on the following operating system environments:
- IBM z/OS versions 1.09 through 2.1
- IBM z/VM versions 5.3 and 5.4
- IBM z/VSE version 4.2.1
Model 204 Release V7R4
Release V7.4 is supported on the following operating system environments:
- IBM z/OS versions 1.09 through 2.1
- IBM z/VM versions 5.3 and 5.4
- IBM z/VSE version 4.2.1
Model 204 Release V7R1
Release V7.1 is supported on the following operating system environments:
- IBM z/OS versions 1.09 through 2.1
- IBM z/VM versions 5.3 and 5.4
Issue with Horizon and z/OS 2.1
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 in version 2.1 because the TCP Default Send Buffer Size (DefaultSndBufSize) was increased to 65536 (from 16384 in earlier versions).
Solution
- Model 204 v7.6 and higher:
N/A; fixed by zap 75Z226 in source. - Model 204 v7.5:
Apply zap 75Z226. - Model 204 v7.4:
Apply EW xxx (currently unreleased EW 274, zap 74Z4552) - Model 204 v7.1 (and under):
Workaround: Set z/OS 2.1 TCP DefaultSndBufSize to 16384.