On 22-10-2014 11:26, Crístian Viana wrote:

You can check the field 'message' in the task output, and if it has the value 'failed', display the field 'message' as an error.

I'm sorry, there's a mistake in the sentence above. Let me rewrite it correctly:

You can check the field 'status' in the task output, and if it has the value 'failed', display the field 'message' as an error.