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Resolving Conversion Problems
IDSONE E DSEXTREC
I CHARACTER CHAR
I I 'XYZ' CHAR
C CHAR DSPLY
C SETON LR
Figure 210. RPG III source with renamed and initialized external subfield
D DSONE E DS EXTNAME(EXTREC)
D CHAR E EXTFLD(CHARACTER)
D CHAR E INZ('XYZ')
C CHAR DSPLY
C SETON LR
Figure 211. RPG IV source with two definitions for renamed subfield
D DSONE E DS EXTNAME(EXTREC)
D CHAR E EXTFLD(CHARACTER) INZ('XYZ')
C CHAR DSPLY
C SETON LR
Figure 212. Corrected RPG IV source with a single definition
Run-time Differences
If you have prerun-time arrays that overlap in data structures, the order of loading
these arrays at run time may be different in RPG III and in RPG IV. This difference
in order can cause the data in the overlapping section to differ. The order in which
the arrays are loaded is the order in which they are encountered in the source. This
order may have changed when the arrays were been merged with the subfields
during conversion.
In general, you should avoid situations where an application consists of OPM and
ILE programs that are split across the OPM default activation group and a named
activation group. When spilt across these two activation groups, you are mixing
OPM behavior with ILE behavior and your results may be hard to predict. Refer to
Chapter 3, “Program Creation Strategies” on page 23 or
ILE Concepts
for further
information.
Appendix B. Using the RPG III to RPG IV Conversion Aid 403