Symptoms
How to bulk delete Error workflow instances.
Diagnoses
NA
Resolution
Feature Logged to make this easier and more obvious. It is possible at the moment to do this. In normal circumstances the error instances will all be long to the same or multiple versions of the workflow cause the design is running into an error. In cases like this you can note the Version of the error instances and then delete that version of the workflow which will also delete the error instances from the system.