GCM FAQ

The Following Events Had Addresses (Where) That Could Not Be Found

GCM relies on the “where” field found in the google calendar which has been specified. The value of this “where” field is converted into a latitude and longitude using Google's geolocation API; the conversion sometimes may fail for various reasons, but most usually it is because the where data is incomplete. To make sure the data is sufficient, copy and paste the “where” field into google maps. If a single location is returned, then the data is correct.