It would be interesting whether anybody can successfully access STORED PROCEDURES in a firebird database via DreamFactory. If yes, what version of firebird and DF are you using. That might give me a hint whether it is “just” a version issue.
Or does anybody have enough inside to the source code of DF to give me a hint, where I could look for an error in the firebird or other modules that might be the problem that SPs are not shown for firebird 3.0 databases?