DSN error message

I got a strange error when an ODBC Data Source existed in the 32-bit Data Sources and was missing from the 64-bit Data Sources (ODBC) =  "The specified DSN contains an architecture mismatch between the Driver and Application". I added the DSN to 64-bit control panel to fix it. The error message made it seem like I used the wrong ODBC driver, but really it was unable to find the DSN.