Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Discussion and questions about Cumulus weather station software version 1. This section is the main place to get help with Cumulus 1 software developed by Steve Loft that ceased development in November 2014.
It's finding "00.00" in a position where it expects a time(on line 1 of mar17log.txt), but Windows doesn't recognose that as a time. My guess would be that you have changed your Windows settings so that the time format has changed. You'll need to correct it to make it match the time format you are now using (or go back to the setting you were previously using,which may then require you to edit any lines which have been written since you changed settings).