cvs 1.12.10 still using rcs binaries?

[Chris Bohn]

We removed the rcs binaries from our machines since someone accidently 
corrupted a cvsroot repository file by using rcs on it.  I found this:

https://www.cvshome.org/cyclic/cyclic-pages/rcs.html
"CVS 1.9 and earlier were also implemented by calling RCS programs, but this 
is no longer true as of CVS 1.10."

so I was pretty certain we wouldn't need the rcs binaries since we are now 
using 1.12.10 (and even before were using 1.10).  Now, when I check in a file, 
I get an error like:

[D:\temp\testproj]cvs ci vers.cfg
rlog: not found
/cvs/root/systems/testproj/vers.cfg,v  <--  vers.cfg
new revision: 1.14; previous revision: 1.13

So is 1.12.10 really calling the rcs binary rlog, or is there some other 
problem (perhaps some option when the server binary was compiled)?

thanks
Chris