rlog reporting "branch refers to non-existent revision"

[John Anderson]

I am using RCS 5.9.2 and cvs 1.12.13 on a 64 bit Ubuntu 14.10. I am 
having no probems with cvs, but on a few of my repository files, rlog 
fails with an error message of the form:
    rlog: ./handandfoot/runnables/UpdateStacks.java,v:20: branch refers 
to non-existent revision `1.16.2.1'
    rlog aborted

I have attached the file that produces the above error. I can't see any 
problem with that file, but I am certainly not an RCS expert. Can anyone 
see what the problem is? Or is this possibly a bug in RCS?

Thanks for any help you can provide.


    -John

UpdateStacks.java,v
Description: Text document