Hey Noel.,
sorry for the delayed reply. I've been laid up with an illness for a few days .. I am on the mend now.
Thanks a bunch for your post again, I went through the process as you suggested without a freeze which also reveals the _badwolf style itself is ok .. it's the loop which causes the issue.
I have reverted back to _badwolf for the arrangement and used a different loop file (not as good as the previous BIAB loop but it works) .. I just need to find out now if the previous loop file is ok to be used elsewhere .. or if it's corrupted in some way.

Thanks to all forum contributors for the help and advice. (Still haven't had any email back from PG Support after a number of email attempts)
Cheers!