[Elecraft] K3 Utility error codes?

[Sam Morgan]

18:11:49 Opening connection to ftp.elecraft.com
18:11:49 Opening connection to ftp.elecraft.com
18:11:49 InternetFindNextFile completed with error 6: The handle is invalid.
18:11:49 Ready
18:11:50 K3 MCU version 03.91. COM4 RS-232 speed 38400 bps

what does the error 6 mean?
is there a listing of the error codes for K3 Utility somewhere?
I tried the archives and the help file, but I may not have used the proper 
search phrase/term(s)

-- 
GB & 73
K5OAI
Sam Morgan