I have figured out one thing. I made a clean realmd database.
Started realmd.exe and check if I can see the realm in realm selection, and there the realm was.
BUT when I startup mangosd.exe and finishes the loading it has changed the table data of the realmlist table in the realmd database to which was previously empty.
It adds the following:
5875 6005 6141
Thats when the problem arises. When I check the realm selection again, the realm has disappeared.
So I tried one thing. I had realmd.exe and mangosd.exe up and running. Both have finished loading.
And so I removed what mangosd.exe had added to the table data and to my surprise the realm had appeared.
So it seems that mangosd.exe is the culprit of this all.
I know the numbers are for the file versions of patches:
1.12.1, 1.12.2, 1.12.3
.
Is there a solution to this problem?