Yes right, only the SPC / DPC CDCs (BOOLEAN ctlVal) are supported for now. You are welcome if you wanted to add the FLOAT feature.
Can you try rev. 0.80d? - I have no way to test atm.
Service Release 0.80d 2025/03/07
this is expected - there is something wrong in your data model coming from your server. In CID file, there is all right, but in the real datamodel read from the server, there is something non-standard. Check differences in the structure between utc.cid/IEDVIew (MMS) definitions (from CID) and IedTreeView/IedView(MMS) from Server. There must be a mistake.
Service Release 0.80c 2024/11/19
Added some code to avoid crash, however, if there is a problem in data structure, the dialogue will not show. Try rev 0.80c
If you load the CID to Iedexplorer, run the server simulation and connect, does it work like in my case (means the dialogue shows without crash)? - in other words, is the problem isolated to your external server connection?
Still cannot reproduce, for me it is working.