man 1.5j - can't find cat, tbl, nroff, less

["Hughes, Bill" <Bill dot Hughes at cox dot co dot uk>]

When I try 'man grep' I get the following.
/bin/cat: not found
/usr/bin/tbl: not found
/usr/bin/nroff: not found
/usr/bin/less: not found
Error executing formatting or display command.
System command (cd /usr/man && (echo ".pl 1100i"; /bin/cat
'/usr/man/man1/grep.1
'; echo; echo ".pl \n(nlu+10") | /usr/bin/tbl | /usr/bin/nroff -c -mandoc |
/usr/bin/less -isrR) exited with status 32512.
No manual entry for grep

and ' man -w grep' produces
/usr/man/man1/grep.1

output of 'man -D grep' and 'cygcheck -svr' attached.

NB it fails as above for any man foo where foo should have a man page.
Man foo where foo has no page returns 'No manual entry for foo' correctly.

regards,
Bill Hughes

 <<cygcheck.out>>  <<man.out>>

Attachment: cygcheck.out
Description: Binary data

Attachment: man.out
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