Re: SDL-News: packages

Subject: Re: SDL-News: packages
From: Rick Reed TSE (
Date: Thu Aug 07 2003 - 11:06:08 GMT

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-----From Rick Reed TSE <> to sdlnews ----- at wrote on 06/08/2003 21:14:

> Hello all
> I have set up this very simple system using two packages which have the same
> signals.
> I then want to use these two packages together and interconnect them using the
> same signal names.
> My difficulty is how identify which package definition should be used. I get
> the error message 'Due to ambiguity, the identifier must be qualified to
> denote the package defining it'. In my case the identifiers are two signal
> lists.
> Any ideas please

Dear Keith,

If you have two signals definitions for a signal with the same name in
different packages, you have defined two different signal (types).

For example, if S is defined in package P1 and S is defined in package P2,
these are two distinct signal definitions with identities:


It seems that you intend these to be the same signal. In this case, there
must be just one definition in one package and there should be a USE clause
for the other package to make the signal visible (assuming the packages are
not nested). For this reason, you may decide it is best to introduce a third
package containing the signal definitions, which is included by a USE in
each of the other two packages.

Rick Reed -
Tel:+44 15394 88462 Mob.:+44 7970 50 96 50

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