[xmlsec] I can't sign with URI="#documento" ( I'm read FAQ 3.2 and search in Google)

[Juan Enrique Ortúzar Elton]

HI

I know this has been covered in FAQ and I have read the mailing list but I
have the classic XPointer problem.
I code de sign1.c example and work fine, but when the xml is:
<Envelope>
   <Data ID="documento">
...
...
  <Reference URI="#documento">
...

I get the classical error : "libxml2 library function
failed:expr=xpointer(id('documento'))"

I try all and the same error persists.

I run the latest version of xmlsec, libxml2 and libxsl.

I hope you can help me.

Regards

Zulo 
(Juan Enrique Ortuzar Elton)