Looks like cc 2014 Photoshop.exe crashed. However you state its a simple action that it was running over 30 minuets. You did not post the action of state wither you were batching the action. However you stated that 2298 items were updated. I do not know what you classify an item to be. If by item you mean image file and your batching the action. If the Action adds documents to Photoshop open documents and does not close then before ending the number of document open increases with each image file processed. After processing 2298 files the could be a countless number of open documents consuming RAM and scratch space your machine may have simply ran out of resources and Photoshop crashed which freed up the consumed resources.
The action is just a simple image adjustment:
1. step opne image (pgm format)
2. Shadow/Highlight adjustment based on a saved parameter.
3. Save image
4. Close image.
As I can see in the task management window there is no RAM overflow, the Photoshop use 400000-404000 K RAM while the process.
I don't understand your action. Normally if you was to do a shadow and highlight adjustment all you need is a single step action your step 2. Then you batch the action using menu File>Automate Batch or menu File>Scripts>Image Processor...
How does your Action know what image to open in step 1? What does the action open?
yes, you are right, I have created an action and use it with the File>Automate Batch. Sorry if I was equivocal.