Hallo Peter,
im Memo for User für R520 ist folgender Hinweis enthalten:

2ai) Workstation gateway option removed

Support has been removed for Workstation Gateway in V5R2, which has been
replaced by the 5250 function of iSeries Access for Web product
(5722-XH2). This product is licensed as part of iSeries Access Family
(5722-XW1). The following CL commands have been modified to remove the
workstation gateway server as an option:

STRTCPSVR
No longer supports SERVER(*WSG) as a parameter value.

ENDTCPSVR
No longer supports SERVER(*WSG) as a parameter value.

CFGTCPAPP
Configure workstation gateway (Option 15) is no longer
available

CHGWSGA No longer available.

CFGTCPWSG
No longer available.

CMDWSG This menu is no longer available.

WRKSRVTBLE
No longer shows service wsg at port 5061 for protocols TCP and
UDP.

Attempting to use a Web browser to connect to a WSG server at V5R2 will
no longer work, since WSG server will no longer exist and there will no
longer be a WSG listener at port 5061 (default for WSG).

For servers that have been upgraded to the V5R2 OS/400 release, program
objects associated with the WSG server are deleted. In addition, exit
point QIBM_QTMT_WSG format QAPP0100 is removed.