HP 3000 Manuals

Introduction to MPE XL for MPE V Programmers Migration Guide

SORTINIT (NM) 
(changed) 

Some parameters have changed for SORTINIT in native mode.  Reserved
parameters are:  keycompare, errorproc, and memsize.  You can not specify
these parameters, but you must maintain the parameter positions.

MPE/iX 5.0 Documentation