Hi All.

Possible work around steps posted below.

I have had this same (or similar) problem in BIAB 2021 tonight: I had worked on an SGU file, exported the WAV files, worked in my DAW, realized I needed to make a change to the SGU, re-opened the SGU... and went wide-eyed when the drum track was all over the place: two drum tracks were playing with different BPM, etc.

BIAB was also giving a message "no drum style is loaded". No repair options solved this problem. I was using the default Drums within the Style. I checked: the impact was only for this single SGU file, not any of my other SGU files.

Steps to help with some recovery (some, if not all):
1. With the damaged file loaded in BIAB, choose File-->Save Special-->Save Song(s) to text on Clipboard or (files)
2. Using all of the defaults in the pop-up screen, choose "Save as .txt file" save the damaged file as a text file. Let's say you named it Damaged.txt. You can open that file in Notepad or equal.

3. Now create a New SGU (File-->New). Choose the exact same Style you were using in the damaged file.
4. With the new SGU, choose Fille-->Save Special-->Save Song(s) to text on Clipboard or (files)
5. Using all of the defaults in the pop-up screen, choose "Save as .txt file" save the new file as a text file. Let's say you named it New.txt

6. Close out of BIAB

7. I then opened the damaged.txt file in Notepad as well as the new.txt file and compared the two. I could then immediately tell a difference. The damaged.txt file had a line that read (amongst other lines) "RealDrums [in style:" and nothing after that. The new.txt file had the same text but a complete description of the style.

8. I copied the RealDrum line from the new.txt file to the damaged.txt file.

9. I then opened a brand new SGU file. From the updated damaged.txt file (with the change in the RealDrum line included) I copied ALL of the text. I then just pasted it into BIAB. A window popped up, and I chose all the default options: everything that was in the .txt file was represented in the pop-up window. BIAB pasted the correct chords, the BPM, even the panning.

10. One thing it did NOT do: I had added some other RealTracks on top of the Style tracks... those did NOT get pasted in, even though I could see them in the pop-up window. Not sure why, I am still looking into that. If I find a solution, I will reply.

Paul