RE: When ctl-opt main() is missing...

[smith5646midrange@xxxxxxxxx]

What is the difference between these (linear vs cycle) from a technical point of view.  Is one more efficient than the other or anything?  I'm always looking for the "that is cool" bit of knowledge that might be useful down the road.



-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Charles Wilt
Sent: Thursday, October 31, 2024 11:35 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: When ctl-opt main() is missing...

With MAIN() you create a "linear-main" RPG program..
Without it, it's a regular "cycle-main" program.

Charles

On Thu, Oct 31, 2024 at 9:05 AM Jean-Marc DUVAL via RPG400-L < rpg400-l@xxxxxxxxxxxxxxxxxx> wrote:

> Hello,
>
> I'm surprised... I never put the MAIN() keyword in my CTL-OPTs.
> Just NOMAIN in my SRVPGM.
> My programs are compiled in CRTBNDRPG, that's probably the reason. I 
> never use CRTPGM. Yes, I know, I must go to pure ILE structure but...
>
> -----Message d'origine-----
> De : RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> De la part de 
> Martijn van Breden Envoyé : jeudi 31 octobre 2024 15:40 À : 
> rpg400-l@xxxxxxxxxxxxxxxxxx Objet : When ctl-opt main() is missing...
>
>
>
> ATTENTION : Ce message provient d'une source EXTERNE. Veuillez n'ouvrir
> les liens ou pièces jointes que si vous êtes sûr de l'expéditeur.
>
>
>
> Hi all,
>
> I've just helped out a very experienced colleague with a program that just
> wouldn't run. In debug it halted at **free. It showed status RUN in
> WrkActJob eaiting quite some CPU. In the call stack it stopped just past
> program entry point _QRNP_PEP.... We were not even able to force it into an
> error with the wrong  number of parameters.
> After a couple of hours testing we found that the ctl-opt main() keyword
> was missing.
>
> I would say that the compiler should have been able to tell us about this
> situation or that it could have just ungracefully failed runtime.
>
> Just out of curiosity: is there a reason why a program with this condition
> does indeed compile and can be called without failing?
>
> Thank you for any shared thoughts
>
>
> Kind regards,
>
>
>
> Martijn van Breden
>
> lead software architect
>
>
>
>
>
>
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