Re: Help us migrate to ILE RPG

[Gwecnal@xxxxxxx]

In a message dated 01/16/2001 11:33 AM Pacific Standard Time, "Gerald 
Magnuson" <magnuson@knapheide.com> writes:

>  We have very old code we are maintaining and must not break.

>  We only want to take immediate advantage of a few ILE features
>  right away. Long field names, max files (no, we cannot re-write
>  those huge apps), change some programs to service programs that
>  are called all over the place.
>  
>  We think we need the following items to move ahead.
>  1) the concise answer the following question.
>                   "What parts of RPG3 will NOT work in ILE RPG?"

You can run all your source through one of the free converters and start 
using RPGIV right away with two gotchas in my experience:

1) To get things to behave like they do now you need to compile with 
DftActGrp(*no) ActGrp(*caller). That may not be the way you will do things in 
the future, but for now
it will keep programs behaving like they do now.

2) Numeric overflow and underflow.  RPG3 does not care, RPGIV does a hard 
halt.
You need to find every calc where overflow or underflow are possible (they 
are flagged in the compile listing as ignorable errors) and write code to 
handle it.




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