Internal error when scrolling Tags without selecting one

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Open a project's settings and go to tab "Tagsets"
2. Select a tagset
3. Grab the "Tags" scroll bar and scroll down
4. Release the mouse
5. Grab again and scroll up
6. Release the mouse again

What is the expected output?
No differences, just scrolled through a list.

What do you see instead?
Internal error

What version of the product are you using? On what operating system?
webanno SVN rev. 464
Debian
Tomcat 6
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8.7) (6b18-1.8.7-2~squeeze1)
OpenJDK Server VM (build 14.0-b16, mixed mode)

Please provide any additional information below.

Original issue reported on code.google.com by tobias.k...@gmail.com on 6 Jun 2013 at 3:08

[GoogleCodeExporter]

I just tried this as a user with super-admin rights using Safari 6.0.5 and was 
unable to reproduce this.

When you get an internal server error, tomcat should write some stack trace to 
catalina.out. Can you provide the stack please? Also, which browser are you 
using?

Original comment by richard.eckart on 6 Jun 2013 at 3:15

[GoogleCodeExporter]

Google Chrome 27.0.1453.110

Browser was a good hint. Error not occurring with Firefox and rekonq (pure 
webkit).

Original comment by tobias.k...@gmail.com on 6 Jun 2013 at 4:46

Attachments:

• issue1.txt

[GoogleCodeExporter]

That happens when no tag is selected from the tag list choice (trying to add 
null to the model)
updating on null is managed now

Original comment by seidy...@gmail.com on 6 Jun 2013 at 6:10

• Changed state: Fixed