Today's workout didn't transfer/upload (Ergdata)

[Zuman]

I've used Ergdata for every workout for a long time. I mount my iPhone in the C2 holder above the PM5 and at the conclusion of my workout I scroll over to the LogBook screen on the phone and hit "Sync" to upload the verified data to my C2 logbook.
Today, everything seemed to work as usual during my rowing. I tracked my workout on both the PM5 and iPhone as it was happening, and I monitored my HR on the phone's Ergdata screen.
At the conclusion of the workout, I scrolled to the Logbook screen and touched "Sync," but received the message that there was nothing to upload.
I checked the PM5 and confirmed that the workout was still in its memory, with the View Detail screen containing the complete workout breakdown.
Any thoughts?
Thanks.

[Citroen]

Get the following:

1. PM5 firmware version. if it's not 206, 169 or 31 then your PM5 needs an update.
2. iOS version
3, Ergdata version
4. Logbook ID

Write an email to info@concept2.com with details of what went wrong and whether you know how to recreate it.