This is not unusual. Sketcher is trying to apply the solver to the import. If the sketch is too complicated it will throw out an error which you normally continue from.
If you need a complex sketch simplified, open it as a drawing, clean up the geometry and export it again as a DXF. Now you can open it in sketcher.
>>select the .dwg file you want to open
>>on "import new model", select part and use automatic templates
>>click okay and the file opens as an editable drawing.
>> use the above link for more detail. It has no soud but I kinda pieced it together from information you gave me and trial and error. This method works a little better for me.
Creo has a tool autobuildZ to create 3D models from 2D drawings. Information in the help files and the knowledge base (videos).
You enable it by autobuildz_enabled yes in your config.pro
I knew there was a specific way to do this. Is this were the Legacy Migration leads or is this totally separate?
Never needed it but good to know about it. Thanks Reinhard!
did a search in the help files. Never found out where they have hidden it.
The disadvantage is you get a dumb block but you can redifine each feature.