I've commited a fix to ShowMessage(). This will stop the crash and still give us a message -- but it will go to the console if it can't reach a mini-buffer.
This is now a problem with either Minibuffer or InsetInclude depending upon your POV: should we ensure a buffer has a BufferView when loading it as part of a multipart doc (InsetInclude problem) or should we find a different way to access the minibuffer if we haven't got a BufferView yet? Can we access the parent documents BufferView to get its minibuffer instead? This would save a lot of hassle since that buffer was almost certainly already visible. Allan. (ARRae)
