sorry for the circomstances!
I would like to help you solving the issues on your side in shortest possible time.
logi.CAD 3 and logi.RTS will continously be improved (more features, more bugfixes). This makes it neccessary changing the RTS version when changing logi.CAD 3 version. logi.cals tries to keep compatibility to different versions of logi.RTS but for some new features it is not always possible. logi.CAD 3 shows you within the application view the recommended version of RTS for your version of logi.CAD 3 - please see the screenshot:
You can also find this information on our website: help.logicals.com
If the problem still persists I think it would be a good idea discussing further steps by telephone call. Therefore please give me your numer by PN.