FPEC2323I `<V1>` IS AN AMBIGUOUS ABBREVIATION IN THIS CONTEXT. `<V2>` IS ASSUMED

Explanation
 The abbreviated option or parameter <V1> is
specified in SYSIN. However, <V1> is too
short to be unambiguous and can match more than one possible option
or parameter. <V2> is assumed for further
processing.

User response
 If the assumed option or parameter is not correct,
specify a longer abbreviation or the full name.