Well guys,Originally posted in cdnusers.org by hshahzad
The problem turned out to be a strange one.......... In recent past, I had sent the brd file to Cadence for backanotation to orcad schematic (refdes renaming).
It appears that guys at Cadence used 15.7 to open the brd file, while I was using 15.2. Allegro does not give warning if you are opening a 15.2 db in 15.7 or other way around. Thus in the process the db was converted into 15.7 compatible format and thus caused ODB ++ generation problem in 15.2
So the bottom line is ODB++ generated smoothly from 15.7 :)