Signing PDF

Hi,



I use iText5.5.2 and BC1.51 and I found out that I can't sign some pdf files in Java. I have attached ok.pdf (I sign it successfully) and nok.pdf with the exception on signing :

java.lang.AbstractMethodError: javax.xml.parsers.DocumentBuilderFactory.setFeature(Ljava/lang/String;Z)V

       at com.itextpdf.xmp.impl.XMPMetaParser.createDocumentBuilderFactory(XMPMetaParser.java:423)

       at com.itextpdf.xmp.impl.XMPMetaParser.<clinit>(XMPMetaParser.java:71)

       at com.itextpdf.xmp.XMPMetaFactory.parseFromBuffer(XMPMetaFactory.java:167)

       at com.itextpdf.xmp.XMPMetaFactory.parseFromBuffer(XMPMetaFactory.java:153)

       at com.itextpdf.text.pdf.PdfStamperImp.close(PdfStamperImp.java:337)

       at com.itextpdf.text.pdf.PdfSignatureAppearance.preClose(PdfSignatureAppearance.java:1315)

       at com.itextpdf.text.pdf.security.MakeSignature.signDetached(MakeSignature.java:140)

       at org.btrust.signer.PDFSigner.initSignPDF(PDFSigner.java:546)



Until now I have used iText5.4.2 and BC1.49 -and had no problems with signig.

What could be the reason for that? Can someone try to sign the nok.pdf file?



Best Regards

Valentin Ivanov

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