[LITMUS^RT] Error while testing the dummy scheduler plug-in

[lydia mike]

Dear sir/madam
    I was trying to create a new scheduler plugin in litmus-rt using the
below tutorial

https://github.com/LITMUS-RT/litmus-rt/commits/wiki-tutorial
​
In step 2 when i tried to test the plugin i am getting this error

 root at lydia:/usr/src/litmus-rt/liblitmus# ./setsched DEMO
Error: Cannot write to /proc/litmus/active_plugin. Do you have root
privileges?
Error: Setting new plugin failed.
Are there any active real-time tasks? ​

​I am able to set other plugins such as PSN-EDF, GSN-EDF, C-EDF and all..​

​Kindly help me to resolve this error. I am new to litmus-rt .

Regards​

​Lydia
student
REC ​
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