I haven't ran into this issue and I couldn't find any word on it or a fix, but it sounds like it could be some corruption. I'd create a clone of it and recover the clone. Try to turn that into a runtime. If it works just reimport your records from the original and try again.
Should be easy enough to text: why don't you download the most recent trial, convert the file and try it out?
Was the bug you recall limited to runtimes? I don't recall any such bugs in the regular product.