Hi
I did the same setup in a copy task just to get around the error I'm experiencing.
But back to the main issue
I've made a test task setup as follow
Result
c:\temp\test_1.txt > c:\temp\000000000000.00000000000.XX.SE\txt.txt
c:\temp\test_2.txt > c:\temp\000000000000.00000000000.XX.SE\txt.txt
c:\temp\test_3.txt > c:\temp\000000000000.00000000000.XX.SE\txt.txt
Not much room for different setups, how did your test look like?
Getting same error on 8.2.1 and 8.3.7