RE: MCH0601 on CVTCH

>I am trying to extract the packed value from a string what i
>did is this :
>
> $CtoH           PR          extproc('cvtch')
>   P$TgtHex            64a   options(*varsize)
>   P$SrcChar           128a   const options(*varsize)
>   P$SrcBytes          10i 0 value
>
>callp     $CtoH(w$hex:%subst(w$FldValue:1:a$Length(i)):
>                          a$length(i))
>
>here w$FldValue is a 10k character containing the packed data,
>length of packed data is a$length(i)
>
>At this callp statement i am getting MCH0601
>my joblog says:

The prototype does not match the documentation.  Try pointers to the source
and target strings rather than the above.  The RPG400-L archives have
examples of working code (link at the bottom of every message.)  Search for
'cvtch'.  The FAQ (http://faq.midrange.com) has a description of how to
translate the C prototypes into RPG.

Documentation at:
http://www.iseries.ibm.com/infocenter
 Search for 'cvtch'
  1 result - the MI Library Reference

  --buck