>>I got it again even with SET EXCLUSIVE OFF on replace mNotes with m.lcString in Load_Trans command.
>>
>>I'll get new copy of data and will resume my tests.
>
>Either you have corrupted data/indexes or it's a network problem. Does it happens on particular PC only?

I'm testing it locally on my work PC. I'm testing with big files (6K records) that were already loaded once. So, they should produce all duplicate records (new PK/FK, of course).