NatBib/bibtopic Multiple bibliographies error

Tue Jun 4 11:16:38 UTC 2024

Sorry, having installed 2.4, I am still getting the error message in the LaTeX 
log:

Package natbib Warning: There were undefined citations.

Package bibtopic Warning: Please (re)run BibTeX on the file(s):
(bibtopic)                Vol_25_2.2
(bibtopic)                Vol_25_2.3
(bibtopic)                Vol_25_2.4
(bibtopic)                Vol_25_2.5
(bibtopic)                and after that rerun LaTeX.

similar to the one I reported for RC 2.

No citations after the ones in the first section are included.

John