You should find SourceLink solution 11072282 - Length limitation and acceptable characters for use in netlists and Allegro elements, helpful. Originally posted in cdnusers.org by Padmin
Also, you can set the variable 'allegro_long_package_name' to increase the limits to 256 characters, but this variable must be set on any system using longer file names. You will have to edit your local ENV file and add the following line to set the variable (then restart Allegro).
Make sure you add the line 'above' the User Preferences section.
Hope this helps!