[xmlsec] XML signature error

[sred_94 at libero.it]

Dear Sirs,
I have tried to sign a XML file, but the process ended with these errors:
func=xmlSecTransformNodeRead:file=transforms.c:line=1571:obj=unknown:subj=xmlSecTransformIdListFindByHref:error=1:xmlsec library function failed:href=http://www.w3.org/TR/2001/REC-xml‐c14n‐20010315#func=xmlSecTransformCtxNodeRead:file=transforms.c:line=704:obj=unknown:subj=xmlSecTransformNodeRead:error=1:xmlsec library function failed:name=CanonicalizationMethodfunc=xmlSecDSigCtxProcessSignedInfoNode:file=xmldsig.c:line=722:obj=unknown:subj=xmlSecTransformCtxNodeRead:error=1:xmlsec library function failed:node=CanonicalizationMethodfunc=xmlSecDSigCtxProcessSignatureNode:file=xmldsig.c:line=568:obj=unknown:subj=xmlSecDSigCtxProcessSignedInfoNode:error=1:xmlsec library function failed: func=xmlSecDSigCtxSign:file=xmldsig.c:line=323:obj=unknown:subj=xmlSecDSigCtxSignatureProcessNode:error=1:xmlsec library function failed: Error: signature failed Error: failed to sign file "completetosign.xml"
How can I solve this problem?
Thanking you in advance,
Simone Rossi
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