Question: System of pdes analyically unable to solve

Dear maple  whats wrong with the code that  maple cannot solve analytically pdes with initial conditions

restart:
sys:={diff(u(x, t), t)=0,diff(v(x, t), t)=0};
IBC:={u(x, 0)=exp((x))/(1+exp((0.5*x)))^2,v(x, 0)=1/(1+exp((0.5*x)))};
pdsolve(sys);
pdsolve(sys,IBC);

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