1.2.3 and 1.2.1 compatibility

[David Shaw]

On Fri, Oct 17, 2003 at 01:39:08PM +1000, Felix Yap wrote:
> We had GPG 1.2.1 humming along fine on Compaq Tru64 Unix V5.1A (our
> development and test server). However, it failed to compile on our
> production server that runs Digital Unix V4.0F (Rev. 1229). Since we are not
> C programmers we decided to install GPG 1.2.3 on the production server.  I
> had a feeling that GPG 1.2.1 and 1.2.3 might not be compatible, but we tried
> to exchange files anyway (after exchanging our keys). The other party using
> GPG 1.2.1 could import our 1.2.3 key (and we could import their 1.2.1 key)
> but they could not decrypt our 1.2.3 file.
> 
> Is it possible to encrypt/decrypt in GPG 1.2.3 to and from a 1.2.1 (like
> Microsoft Word 2000 can save files in Word 97 format)?  Is there any other
> way to exchange files between these two versions?  Or is the answer a
> simple: "No, these two versions cannot exchange files!"

It is possible.  To really help though, I'd need more than "it doesn't
work".  Can you tell me what error message, if any, you saw?  Can you
encrypt a message to me with 1.2.3 and I'll try decrypting it in
1.2.1?

David