Answer Posted / naveen chandra joshi

The question is: 
How can i check the object existence in RPG program without 
using QCMDEXC command?

Answers posted by AS/400 experts:- use Monitor On error; what if file is not in user opened mode and already declared & opened in F specs...this solution will not work in this case and program will throw error when it tries to open the file in F specs itself...(This we can solve using File Information DS)
User wants to know the object existence, it (object)can be file object, program object or any other type of object.
Generally we check object existence by using CHKOBJ command but user said not to use QCMDEXC API...

The solution is(by using QUSROBJD API):
      *---------- Global variables:  ----------------------*
     D ObjNam          s             10a
     D ObjLib          s             10a
     D ObjTyp          s             10a
      *---------- Api error data structure:  --------------*
     D ApiError        Ds
     D  AeBytPro                     10i 0 Inz(          %Size(ApiError))
     D  AeBytAvl                     10i 0 Inz
     D  AeMsgId                       7a
     D                                1a
     D  AeMsgDta                    128a

*-- Retrieve object description:  -----------------------*
     D RtvObjD         Pr               ExtPgm('QUSROBJD')
     D  RoRcvVar         32767a         Options(*VarSize )
     D  RoRcvVarLen                  10i 0 Const
     D  RoFmtNam                      8a   Const
     D  RoObjNamQ                    20a   Const
     D  RoObjTyp                     10a   Const
     D  RoError                   32767a  Options(*VarSize)
     
     C                   Eval      ObjNam     =  '???'
     C                   Eval      ObjLib     =  '*LIBL'
     C                   Eval      ObjTyp     =  '*PGM'
      *
     C                   CallP     RtvObjD( RoData
     C                                    : %Size( RoData )
     C                                    : 'OBJD0100'
     C                                    : ObjNam + ObjLib
     C                                    : ObjTyp
     C                                    : ApiError
     C                                    )
      *
     C                   If        AeBytAvl   >  *Zero And
     C                             AeMsgId    =  'CPF9801' 
      *-- Object doesn't exist...
     C                   EndIf
      *
     C                   Return

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