Could you check for errors in the log file ?

Sure, upped logging to 4 and got the following:

First tail = Closed = 0

Second tail = Closed = 1

Hi,

Nothing weird in log file.
Please try to call directly

.../tool/jsonQuery.php?objectClass=Ticket&idle=true

Please send result to support@projeqtor.org

Strangely no error found.
I tested on V4.0.6, just replacing /tool/jsonQuery.php with your file : all is fine, 8896 tickets correctly displayed.
Tested on Chrome 33 , IE10 and FF 27.

Could you try to force refresh of browser cache and / or test on another browser ?

Cleared cache in the initial report obviously to try resolve. Also reproduce able in Firefox.

Hi,

I've encountered some time ago the same error.
As it turned out, after making several updates on tickets using the "import data" functionality, I had in my database a ticket where there was a carriage return in the "name" (or "result", I forget) field.
This carriage return caused the tool to be "lost" and not display any tickets.

In case that helps....

Hi,
The idea of "unvisible" special cars is a good hint.

Mayby some Sql query like following could help :

select * from ticket where name like '%n%';

I did attempt this, but no result...

The good news however, I upgraded us to 4.2.1 last night and it now works. So an interim fix has fixed the parsing of the list.