When i try to use the Digital Signature Service (by doing the example process with the 3 tasks), my cmd has following Output:

Certificate loaded
Provider loaded
CMS created
Signer loaded
BytesArray loaded
Java.lang.NullPointerException
at Java.lang.String.compareTo(String.java:1139)
at .... (and a wall of further text about that)
null
This workitem does not contain any data for updating

What could be the Problem?

Did anybody manage to run Digital Signature Service on YAWL 3.0 ? I just wanna know if i do something wrong or maybe the Service isn't compatible with the new Version?

Attached is my process.

Thanks for any help!

Signature.yawl (10.69 KB)