I want to migrate data of account and opportunity from org1 to org2.
To do this I have created external id field on org 2. And Pupated it with Id field from org 1. When i map AccountID field of opportunity to external id field it shoes error. insufficient access rights on cross-reference id: 0019000001AY1iP
I am following this document https://help.salesforce.com/HTViewSolution?id=000002783
But not able to see option to Choose your related objects (Step 6)
Did I miss anything ? or its just new version of data loader?