I am using an edu Version of Sketchbook Designer 2014 on Win 8.
Since today I can not open a DWG file (16MB) from yesterday. Sketchbook
shows an Error Prompt:
Autodesk product failed to send the required value for SERIALNUM
It is possible to open and save other files but I need to open this one or convert
it to a working file.
Hope you can help me
Welcome to the community. If you think you can zip and attach the DWG, perhaps it can be fixed. That is, if it is not sensitive data that you don't want to share.
You can try to audit and recover it in AutoCAD, perhaps.