Yesterday I had the case that i used two SLL's which contained Objects.
Objects that used inside the same interface name (while not the same CLASS).
Trying to link them to my Main Program, i got a "Error 630 - Link File Error".
In this case the actual PB 10 does not give any sort of hint, which Linenumber or which file has which problem.
After experimenting a while i found the problem. It was the duplicate Interface name.