[LITMUS^RT] Invalid Argument error

[Marov Gazaal]

Hello everyone. I started to learn how to use LITMUS-RT and every thing is
good, but when I was dealing with " Event-Driven task with liblitmus"
section in your tutorial pdf, an error has occurred after applying an
example under this section. the error says:
" task_mode(LITMUS_RT_TASK) failed: invalid argument". I followed the code
exactly but I do not found any problem.could you please instruct me how to
fix that. I attached two pictures one for the code and the other for the
error message.thanks for your help.
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