The item is currently locked for editing. Waiting for item to be checked in or for the lock to be released.
Working with SharePoint Designer 2010 and InfoPath, I created a workflow to perform an Action once a form was submitted or changed.
The error above was stopping the workflow from running any of the Steps / Actions.
The fix was to add a Wait for Change in Document Check-Out Status Action to the workflow. This Action should be the first item executed in the workflow.
Why does this happen? Assume the workflow is being triggered the millisecond that the form is being written to the library and not waiting for all the data to finish writing.
*Note* Once the form/item is unlocked, it might take a few minutes for the workflow timer to process the item.