I solved the following system using fourth order finite difference and shooting methed and i obtained the results below

but when i tried to solve it using dsolve in Maple I did not obtain the accuract results, I hope to know how to obtain accurate results with this system(the system is uploaded)

 restart; Pr := .72; a := 1; c := 1; lambda := 1; M := .2; lambda1 := .2; beta := 0; Ec := 0; A := 0; B := 0; R := 0;

sys := diff(f(t), `$`(t, 3...

I hope to know

what the meaning of the follwing message

illegal use of a former parameter