compute digital signature error

[GoogleCodeExporter]

When trying to sign a pdf document by eID, we get the following error in the 
Java Console:

 computing digital signature...
 SW: 6401
 error: compute digital signature error
 error type: java.lang.RuntimeException
 at be.fedict.eid.applet.sc.PcscEid.sign:877
 at be.fedict.eid.applet.sc.PcscEid.sign:1569
 at be.fedict.eid.applet.Controller.performEidSignOperation:885
 at be.fedict.eid.applet.Controller.run:333
 at be.fedict.eid.applet.Applet$AppletThread$1.run:602
 at java.security.AccessController.doPrivileged:-2
 at be.fedict.eid.applet.Applet$AppletThread.run:597
 at java.lang.Thread.run:-1
 Algemene fout. 

Reading the data from an eID works fine.
When trying to sign a document with the eID, everything goes fine until we 
enter the PIN-code on our card reader.
"computing digital signature..." takes very long until we get the "General 
error".

We are using the applet's version 1.1.3 (December 2013) on Windows 7,
Internet Explorer 11, Java version 7 update 67.

This functionality worked fine in the past and some of our users that use the 
same application still manage to sign digitally with eID.

Original issue reported on code.google.com by ronald.v...@gmail.com on 9 Oct 2014 at 3:06