Aleksandra
Member
OP
I just realized something... if you have WinCC V7.3 with no updates, you have to install WinCC V7.3 SE (which is V7.3+Upd1, in reality)from the DVD... which requires uninstalling V7.3 first. I went through this pain long ago.
Try the collation first.
I have tried with the collation, actually changed the collation of that specific SQL table, but it didn't help.. I will install WinCC v7.4.
Anyway, thanks for your huge help. If I ever figure out the source of the problem, I will post it here