A READER ASKS
I have a FileMaker Pro solution that is a ''separation model'' and I am wondering is it possible to combine the files and get a single file solution as it was originally, is it practical thing to do or too hard / complex / time consuming?
It is definitely possible and I've done it a few times in the past. If you have a solid background in both unified and separation model formats, it generally isn't too hard to accomplish. The big challenge is regression testing, making sure everything works as expected.
The complexity and time consuming aspects are generally tied directly to the state of the original files. Personally, I've never really had a problem doing this but I've been lucky. At least twice, the solutions I was converting was ones I made. So I could essentially "see around the corners" and anticipate my trouble spots.
You may want to get some bids from professional FileMaker developers about the endeavor. I would be happy to provide you one myself.