Question: maple plot warning

Hello, 

I am trying to plot an equation with mape,

I give the foloowing comand but I receive a warning which I do not know how to deal with it, I wil be thankful if you can help me.

these are the command and wanring:

plot(eval ((6), {n=10, m=1},k=0.1..0.2)

warning, expecting only range variable k in expression.....

 

Please Wait...