DFS2308X AT LEAST TWO SYSTEMS MUST BE SPECIFIED

Explanation
 There was no input data supplied, the input contained
less than two valid suffix entries, or a blank was encountered. Input
processing on a statement is terminated when the first blank is found.

System action
 Processing terminates.

Programmer response
 Check that two or more valid suffixes were
specified, that there are no embedded blanks in the input data, and
that column 1 is not blank. Rerun the program.