Ok, I figured this error is only occuring when I try to change an object that is already assigned to another transport (this "other" transport is released but hasn't migrated to Production yet)...I'm assuming this is CSOL (Cross System Object Lock) which is stopping this and making this error appear????
For the record, we want CSOL activated...but because the other transport is released I didn't think CSOL would matter in this case?
If CSOL does come into play, the error is not very user friendly. I would have thought it would state something along the lines that the object is locked by another transport....the above error would confuse everyone!!!
Is there any feedback around this error?