I restarted the computer and the problem persisted. I uninstalled, reinstalled, restarted, problem persisted.
This occurred with new scans from the ScanSnap. It also occurred when I tried to re-OCR the failed files using Convert > To Searchable PDF. Those failed files converted just fine when I reverted to 2.9.12.
I scan to PDF using the standard ScanSnap settings: Automatic Resolution, Auto Color Detection, Duplex Scan.
+1 In the same boat. I successfully scanned about 10 documents consisting of a couple hundred pages before the error popped up. On one document, seemingly out of nowhere, I got the OCR engine error. I figured it was a fluke, but the next documents waiting in the Activity window errored with the same problem. Trying to manually convert to searchable PDF resulted in the same error. Restarting the app didn’t help. Downgrading to 2.9.12 fixed the issue.
Sadly this fix seems to be short lived. 2.9.12 has stopped functioning and crashes on startup. Reinstallation of 2.9.13 produces the same OCR error . . .
I have submitted a ticket to the support staff requesting assistance.