cCommon Reader Errors
Query Length Exceeds API Query Limit
Due to the way the Reader scans the Salesforce meta-data to build the parent & child relationships there can be large number of Child objects listed in the Entity drop-down.
With very large objects with many fields and/or objects with large number of child entities the query generated by IMan may exceed the allowed Salesforce query length.
To resolve this issue, you will need to deselect the fields and/or child entities not needed from both the header and children on the field mapping screen.