When exporting Revenue with rollup based off an Export Definition, randomly the fields for CnswithHHInforolledupHHRev are duplicated for some, but not all records. In some instances, the Constituent record does not have any relationships, especially Household relationships.
Download and install the latest Service Pack which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.
Steps to Duplicate
Go to Analysis > Information Library
Add a new Constituent Query to pull Household Revenue and make it a dynamic selection
Go to Administration > Export Definition
Add a new Export Definition with a Constituents record type with the following criteria:
Constituents (with household information rolled up)
System record ID
Go to Administration > Exports
Add a new Export with Export type of "Export Definition", that uses the Selection and Export Definition created above
Start the Export process
Download the output
Note that the CnswithHHInforolledupHHRev fields are duplicated for some, but not all revenue records