I have removed all audio transient info and markers but song will not save to a bun file.
Have I missed something?
 
Thanks
 
Need more help please.

It's pretty likely that you have not in fact removed/rendered all audio transients since SONAR is telling you that you haven't.
 
The last time this happened to me I had a very small/narrow (almost invisible) clip that had transients but of course I could not see enough of the clip to recognize it.

Thank you Ed. I was thinking this also but can not find it ..can we disable all of it somehow?  I (think) I have rendered all
so you must be correct.