I am trying to insert record feeds with the Apex Dataloader (through the command line) and I am not able to do this, because the mapping information for the feed items fail with this message:
ERROR com.salesforce.dataloader.action.progress.NihilistProgressAdapter - Field mapping is invalid: MY_OBJECT__FEED.PARENTID=ParentId\:ExternalId__c
The line that fails is:
ExternalId__c exits on MY_OBJECT__c and is an external id. So this is not the reason for the error. But strangly when I want to check the relation name by doing a getDescribe().getRelationName() on MY_OBJECT__FEED.PARENTID it returns a NULL.
Can anyone help with that?