Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidCastException: Operator is not valid for type 'DBNull' and string "".

Source Error: 


Line 325:    WHILE NOT r.eof
Line 326:      IF NOT IsDBNull(r.fields("message").value) THEN
Line 327:        IF r.fields("message").value <> "" THEN
Line 328:          IF prevmsg = r.fields("message").value OR prevsubj = r.fields("subject").value THEN 
Line 329:            goto EndOfLoop: