I/O error 8

What is the fix for this error message. It happens every 1 day and around 8-10 hours.

well, there is not enough information provided to be able to help you much

like, which version and build of the software?
what weather station type?

also try running the debug version and see if that produces and error report (c:\WeatherD.elf)

build 10.37q build 78
Davis Pro

try running the debug version
and see if it prouces an error report file (see my post above)