importing AX 4 xpo to AX2012


I have imported a AX 4 xpo to my new AX2012 installation. I wanted to know that if there are some fileds in AX 4 that are deprecated in AX2012 because most of my coding errors are due to the reason “fields does not exist”.

If so, please point me to any direction where I can find a list or something.

Please help