JE Import error

I'm importing a JE for payroll entries.  The first part of the testing has passed and i'm into the importing phase where I see the error shown in the attached snip-it.  This has happened to me in the past, but I can not recollect what was wrong or how to fix it...  please adviseee
 

When I get that error, I completely close out of M3, logout of the website. When I log back in and start M3 back up, it usually works.