I just found a few of these errors in *Messages* and since I have > 20
.org files, I used this approach
cd ~/orgmode
# this gives me the byte offset & the filename for each matching line
grep -br 'CLOCK: ' * > ~/tmp/org-missing-end.txt
#this searches within a few bytes of the byte offset reported by emacs
grep -E ":3007.:" ~/tmp/org-missing-end.txt
Searching within a few bytes was not necessary. In my case I found a
":CLOCK:" string at the byte-offset in the error message.
--
Brian Wood
Applications Programmer
UC Berkeley IST