Error while checking gpg sig in pgp

J Vender jvender at
Sat Mar 6 20:20:36 CET 2004

I've been misunderstanding something here, it seems.

GPG reports a message "you can only make detached or clear signatures while in --pgp2 mode, this message may not be usable by PGP2.x"

I've been trying to sign the text in the textfile with GPG using
gpg -s filename
and I have the pgp2 option set in my gpg.conf file (I've also tried to add it to the command line with no difference)

Is a message signed in GPG using the -s or --sign flag not verifiable using PGP2.x? According to the message above, it looks like PGP2.x can only verify GPG signed messages if they're clearsigned or detached-signed, but no if they're -s signed.

By the way, thanks for the help.

*********** REPLY SEPARATOR  ***********

On 3/6/04 at 1:57 PM David Shaw wrote:

>On Thu, Mar 04, 2004 at 02:37:42PM -0600, J Vender wrote:
>> Any idea why I am getting the error message, "ERROR: Nested data has
>> unexpected format. CTB=0X90" in PGP 2.6.3ia when I try to verify
>> some signed text which was signed using GnuPG 1.2.4 set up for
>> PGP2.x interpolability using the --pgp2 option?
>That error indicates that the --pgp2 option wasn't used.  If you are
>absolutely positive that --pgp2 was used, please sign some text and
>post it here.  I'll look at it.

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