Why does the code give different results with different versions of MATLAB?

The following code gives the required (and correct) answer with MATLAB 6.1 but with MATLAB 7, it gives the following error that the variable I is not recognised. This variable I appears with the execution of the statement with P matrix.

clc;
A=[-00967    21277;
 -00050         0;];
T=1/2500.0;
y=[0;24.0/L];
syms d t
C=int(expm(A*(T-t))*y,d*T,T);
B=inv(eye(2)-expm(A*T));
x=B*C;
D=expm(A*d*T);
P=[1 0]*D*x

I variable appears in the P matrix in MATLAB 7. Please explain the anomaly. It is urgent

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/29922-why-your-question-is-not-urgent-or-an-emergency

Answer 1

[Azzi Abdelmalek]

y=[0;24.0/L];

How Matlab will calculate 24.0/L if the value of L is unknown?

You should give a value to L, for example

L=1
y=[0;24.0/L];