JSON to Table stucks while running

Dear all,

I'm trying to convert a JSON-Document to CSV. I created a very simple workflow with only 3 nodes:

JSON-Reader ->  JSON to Table -> CSV Writer

Unfortunately if I execute the node "JSON to Table" it stands still at 0%. If executed, I'm not able to abort the task anymore. I have to close KNIME and start again.

The JSON file looks normal to me:

[  {    "objectid":"55ef1ed95eea212b0006ffa9",    "capacity":0,    ...,   ..., ...}, {...}, ....]
 

"JSON to Table"-Option: does not matter. Always the same behaviour.

Am I doing something wrong?

Best regards,

Daniel