#Error result of Sum function

[jaaret]

I am attempting to sum a currency field with =Sum([EFees]) in the form's header but it is returning #Error. The underlying query does not have any nulls in the EFees field and I can successfully build a summary query off of the query that contains the form data. What is causing the #Error?

 

[genomon]

The error is caused by Sum. Do a help search on the DSum() function.

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