unable to get document id this error in bentley piping.
Do you get this error opening a drawing?
Try the following:
1. Copy the drawing to a temp folder.
2. Using Relationship Manager, delete the drawing from the project.
3. Using Relationship Manager, pick [Tools] > [Document Tools] > [Add to Project...]
This will assign a new doc_id to the drawing and add all the data back to the project.
If you are talking about the "Document ID is Null" error, while creating a new document in Document Manager (image attached), than it is most likely caused because your Windows user group Users does not have read/write permission to the C:\ProgramData\Bentley\Plant V8i\ folder and it's sub-folders. To resolve this issue, please give appropriate access rights for the Users group:
Hope this helps,
Justinas