One possible cause for this is that the combination of the length of the folder path where the drawing resides and the name of the file is too long for TakeOff to cope with.
Try moving the file to a shorter path such as C:\temp and loading from there.
It may also be related to an issue with the software licence after the application has been started.
Error '-9999 opening drawing' in On-Screen TakeOff
A particular drawing cannot be opened and gives error -9999 opening drawing
Written by Magda Antonie