Yes i have, it was working fine in mirc 6.03 forever, then when i installed 6.1, everything was fine for about a day, then i noticed these errors, sometimes the /write is successful, sometimes it isn't and it gives that error, this is on 2 different scripts with 3 different files, and different parameters.
Also a friend of mine said he got the errors too
i could do a /write now and tell you it works fine, but if i keep doing it, after a while i will get the error, or something.
