This field name is not known

Symptoms

Running a report produces the error:
This field name is not known.

Possible solutions

Having a report field that was not successfully mapped to a stored procedure field, can sometimes cause this. In these cases, the unmapped stored procedure field will be part of the error message; for example:
This field name is not known : {Rpt_Ap01FRISp;1.TcAmtAmtPaid} 

Make sure the report field is in the stored procedure’s result set, and set the data source location as described in the Error 534 topic.