We have a customer that has sent us a native Catia file and a STEP file. Supposedly these files contain all the information for manufacturing in a MBD form. 

It is my understanding that only STEP 242 carries over MBD information and I believe, see below clip, that the STEP they sent us is AP203. 

What I don't know is that if you open a Catia, cgr file in SW if the MDB information is supposed to come in or if there is some magical import setting you need to set.

In both cases I'm not seeing any MDB info as the Annotations are empty when I bring in both files. Not a MDB expert so any help appreciated.

From the header of the STEP file.