Films in IGI

Does anyone know why a film would have a batch number but no associated film # or dates for the film on the IGI?

Any help would be appreciated. I have copied below an example for Asientos, Aguascalientes, Mexico that has the batch # but not the film# or dates.

Alicia Carrillo
San Jose, Calif

PAULA
Female

Event(s):
Birth:
Christening: 26 FEB 1884 Nuestra Senora De Belen, Asientos, Aguascalientes, Mexico

Death:
Burial:

Parents:
Father: PABLO LUEVANO Family
Mother: LEOCADIA SAUCEDO

Messages:
Extracted birth or christening record for the locality listed in the record. The source records are usually arranged chronologically by the birth or christening date.

Source Information:
Batch No.: Dates: Source Call No.: Type: Printout Call No.: Type:

C646205