AW: malformed request

>   I need to send a msg to main.c.
>
> but when I run the code,the error msg is
>
> KD# <User> s0: malformd request
>
> Please help.

Seems as if Sigma0 got a message in an incorrect format. However, to be able to tell you what exactly went wrong, it would be very helpful if you'd provide some additional information.
What exactly were you trying to do? Which thread tries to send a message to which other, and to which task(s) do these threads belong? What main.c are you speaking about? What does the code you used for sending the message look like?

Cheers,
Philipp