Question: Maple Error: floats not handles

I'm new to Maple and am trying to solve a set of simultaneous equations. The equations have two independent variables x and T (contained within the letters "a" to "l" and "G" in code below) and 5 dependent varaibles X,Y,Z,W,V. Ultimately I want to solve for X...V with various values of x and T, but at the moment I'm struggling to get my code to work for just one x and one T value. The code I have so far is:

> solutions := solve({0 = -a*(h-Y-X-Z-V+W)+b*Z, 0 = k*Y-l*V, 0 = d*Y-e*X-g*W*X/(W+X), 0 = a*(h-Y-X-Z-V+W)+G-c*Z-b*Z, 0 = c*Z-d*Y+e*X-k*Y+l*V-f*W*Y/(W+Y)}, {V, W, X, Y, Z});
> solutionscopy := solutions;
>
> x := .5;
> T := 150;
>
> nA := 100;
> TA := 1;
> CA := 100;
> TB := 30;
> CB := 1;
> T1 := 1;
> C1 := .1;
> T3 := 600;
> C3 := 10;
> T4 := 0.1e7;
> C4 := 1;
> T5 := 200;
> C5 := 10;
> T6 := 300;
> C6 := 50;
> krWL := 10;
> krQD := 1;
> a := CA*exp(-TA/T);
b := CB*exp(-TB/T);
c := C1*exp(-T1/T);
d := C3*exp(-T3/T);
e := C4*exp(-T4/T);
f := krWL;
g := krQD;
h := nA;
k := C5*exp(-T5/T);
l := C6*exp(-T6/T);
G := 10^x;
>
> solutionscopy;
Error, (in content/polynom) general case of floats not handled

As the solve(..) command takes a long time to process I am trying to keep a 'master' copy of the solutions and then solve a copy of the solutions ("solutionscopy") for each T and x value. These equations are solvable as I am able to solve them if I first declare the numeric values of a to G before invoking the solve command.

Is there a better way of doing this, and do you know why I am getting this error message?