Re: CPF7E56 - Identifier is ambiguous

[Ken Sims <mr2087@xxxxxxxxx>]

Hi Matt -

> Why does the IBM debugger give this message for a non-qualified field
> (Identifier is ambiguous)?
>
> The field VITEMID is defined in three files.
> FVNDRCOST  IP   E           K DISK
> FVNDRMASTERIF   E           K DISK    PREFIX(VM)
> FVNDRITEM  IF   E           K DISK    PREFIX('VI.')
>
> Here's the definition for making one field qualified.
> D VI            E DS                  EXTNAME(VNDRITEM) QUALIFIED
>
> I try to view the contents of field VITEMID from VNDRCOST (not qualified nor
> prefixed).
>
> How do I tell the debugger to view this field without making modifications
> to the program to only prefix without the dot (.)?
Sorry for the delay.  I've been on vacation and even though I read the 
message, I wanted to try one thing out at work today before responding.

I'm sending this to the RPG400 list as well since it is specific to RPG IV 
debugging and since I would like some additional input from Barbara Morris.

Essentially the same question arose on the RPG400 list last week.

The answer is that if you are referencing a field with two instances, to 
see it in debug you must qualify it, even to reference a field in an 
unqualified data structure.  You do this with:

eval [field] of [datastructure]

According to Barbara, on V5R2 and following you can also do it with:

eval [datastructure].[field]

So far, so good.  The only thing I can't find a way to do, and this is 
where I would like some more input from Barbara ...

You can have a standalone field with the same name as a field in a 
qualified data structure.  You can view/change the data structure field 
using the methods given above.

Barbara, how can you view/change the standalone field?  There is no data 
structure name to associate it with.  Or is V5R2 smart enough to let you 
view/change the standalone field with just: eval [field]
V5R1 won't let you do this.

Ken
http://www.ke9nr.net/
Opinions expressed are my own and do not necessarily represent the views of 
my employer or anyone in their right mind.