Wellue SPO2 import into OSCAR failing

Hello. I've been a CPAP user for years. I recently started using a Wellue Checkme O2 Ultra oximeter. I have several sessions stored in the iPhone app. Now I want to get a few into OSCAR. I export the Wellue data, one session at a time, as binary, and transfer by email to my desktop, storing the attachment to a dedicated export folder from which I attempt to import into OSCAR using the appropriate option under the OSCAR DATA menu. (Following directions, I first adjusted the exported file names to synchronize the oximeter data with the cpap data.) When I click for the final import, OSCAR pauses a few seconds then crashes. No error message. No SPO2 data line adds to the corresponding session.

Any help appreciated. I see that others have successfully imported Wellue data to OSCAR sessions. How did you do it?

Thanks. -Ron

EDIT - I didn't have latest version of OSCAR. With the latest, I've successfully imported one of three sessions. Failures may have to do with improper synchronizing of the data. Will mess with it. Sorry to post prematurely.