Re: JTOpen - ServiceProgramCall

"Bartell, Aaron L. (TC)" wrote:
> 
> I am trying to call the following RPG Service program using the
> ServiceProgramCall Class.  The input and output parms are data
> structures (I can get it to work with regular fields but not with data
> structures).
> ...
>      P CallRPG_ds      B                   Export
>      D CallRPG_ds      PI
>      D  pInput                             Value LikeDS(CallRPG_myDS)
>      D  pOutput                            LikeDS(CallRPG_myDS)
> ...

Aaron, I think ServiceProgramCall only supports 4-byte-integer and
pointer parameters when passed by value.  Any types other than
4-byte-integer have to be passed by reference (passing a pointer by
value).  Your first parameter would have to be passed by reference (use
CONST in the RPG).  If you can't change the parameter because you
already have RPG callers of this procedure, make a wrapper procedure
CALLRPG_ds2 with parameters by reference that calls through to
CallRPG_ds passing them by value.  Then Java can call CallRPG_ds2 and
your other callers can continue to call CallRPG_ds.