Hello,

I'm running Org mode 9.1 under Emacs 25.2 on Windows 10 (version
information below) and I've encountered a problem when running my
agenda commands that I'm unsure how to troubleshoot.

Org mode version 9.1 (9.1-elpaplus @ c:/scimax/elpa/org-plus-contrib-20170906/)
GNU Emacs 25.2.1 (x86_64-w64-mingw32) of 2017-04-24

After running a custom agenda command, I'm given an error, "Invalid
duration format: ":45".  The backtrace is attached.

I've tried going through all my agenda files and changing any
instances of durations without a leading "0" for minutes.

:45 --> 0:45

But this doesn't seem to help.  I know that recent changes (see
http://orgmode.org/Changes.html) may be related to my issue.  I'm just
not sure how to troubleshoot from here.

I'd appreciate advice on next steps that I might take.

Thank you,

Will