Thank you for your reply.
I have never succeeded to upload that log for JAFF-0064, and the contacts in the log are not in the database.
The name of the file for my first try was as follows for my filing convenience:
JR0UIU-3＠JAFF-0064 20181121(2)
I suspect that “(2)” might have been the cause.
My attempt today by renaming the file to “JR0UIU-3 ＠ JAFF-0064 2018-11-21” did not work and got the same error message.
May I send you the file to you again by e-mail for your further checking?