Where to find a document about @Command and Formula compatibility to take care before to migrate from R5 to R6.5?

We need to migrate server & client from R5.011 to R6.5Is there a document who explain the compatibility problem (or things to take care) for @Command and formula… before a migration from R5 to R6.5 ?

I didn’t find anything in the site…(or I don’t know where to find this information)

Thanks a lot