sa-compile will not configure

[Robert Steinmetz]

I upgrades my working Ubuntu 14.04 LTS to 16.04 LTS SpamAssassin version 
3.4.1.
 Something happened during the upgrade and I ma now unable to get 
sa-compile to configure properly.

Here is the message
root@thelma:~# dpkg --configure sa-compile
Setting up sa-compile (3.4.1-3) ...
Running sa-compile (may take a long time)
Can't exec "rm": No such file or directory at /usr/bin/sa-compile line 
374, <$fh> line 1.
make: chmod: Command not found
make: *** [blib/lib/Mail/SpamAssassin/CompiledRegexps/.exists] Error 127
command 'make >>/tmp/.spamassassin15863LFnIj0tmp/log' failed: exit 2
dpkg: error processing package sa-compile (--configure):
 subprocess installed post-installation script returned error exit 
status 25
Errors were encountered while processing:
 sa-compile
I have found some references to this error message but can't find a 
solution.
I have removed, and reinstalled Spamassassin. I have removed purged and 
reinstalled and sa-compile with no result.
I haven't found anything in the logs to tell me anything new.

I'm hoping someone here can give me a clue as to where to start.

--
Rob Steinmetz
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