Question:
What causes the sync error message: Error message: Cannot process DCR transaction without Country_Mapping_vod__c?
Answer:
When a user encounters the sync error, this indicates that the Country field on the User object does not have a value. It is required that the Admin set the Country field on the User object using the Country's 2-digit ISO 3166-1 alpha 2 code.
Related Documentation:
CRM Help Documentation: Network and Data Change Request Settings Overview