Hi @a_minet ,
Is this a Revit API programming question?
Please note that this discussion forum is dedicated to programming Revit using the Revit API.
Therefore, you cannot expect an answer to a question such as yours relating to installation, product usage, or end-user support issues here.
You should try one of the non-API Revit product support discussion forums instead for that:
https://forums.autodesk.com/t5/revit-api-forum/this-forum-is-for-revit-api-programming-questions-not...
The people there are much better equipped to answer your question than us.
Also, I found out this below link about converting void to solid in Revit UI
https://forums.autodesk.com/t5/revit-architecture-forum/converting-voids/td-p/3772212
Thank you for your cooperation and understanding.
Naveen Kumar T
Developer Technical Services
Autodesk Developer Network