FSUM3218 File `string` contains an incorrect file suffix.

Explanation
 A file specified on the command line has an incorrect
file suffix.      
 In the message text:
 string is
the file name.                                       

System action
 The processing stops.                       

User response
 Ensure that the suffix is correctly specified,
or change the  appropriate suffix attribute in the configuration file
to match the  suffix of the file specified on the command line.  