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Question: DEplot warnings

Question:DEplot warnings

Dkunb 65 Maple 2021
differential-equations deplot plotting
January 05 2022
3

I have the following warnings. Could you help me fix the problem?

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restart;
> 

deS:=diff(x(t),t)=-0.5*x(t)*y(t)

diff(x(t), t) = -.5*x(t)*y(t)

 (1)
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deI:=diff(y(t),t)=0.5*x(t)*y(t)-0.15*y(t)

diff(y(t), t) = .5*x(t)*y(t)-.15*y(t)

 (2)
> 

with(DEtools):
> 

DEplot([deS,deI],[x(t),y(t)],t=0..40,x=0..1,y=0..0.6,[[x(0)=0.99,y(0)=0]])

Warning, plot may be incomplete, the following errors(s) were issued:
   incorrect number of arguments, got 51, expected 50

  

 
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