Capture Task Errors into Orquesta Workflows

Hi,

I am new to orquesta workflows.I am trying to capture the error of the tasks which got failed in the workflow and assign to a variable to display/parse it with custom text included into the error.But could not able to find any link within the stackstorm documentation on this calling of failed task’s error into orquesta workflow. Can anyone please help me to on this problem.

Thanks,
Acharya