Why does MATLAB only run half of my formula?

I've set up a function file and a script file in order to solve a set of ODEs.

As well as the 7 ODEs (dx/dt), the function involves several other functions/formulas that rely on time as well as variables from the ODEs.

I've noticed that for example, a function of C=2*t will run fine, changing through every cycle on debugging mode as t varies.

However, when the function is changed as intended to C=1-2*t, the function C remains as 1 for every cycle, even though t is changing.

Does anyone know why this is happening, and how I can solve it?

(I can happily post the code if needed, but it's extremely long, and this is the only bug to my knowledge)

[Star Strider]

If ‘t’ is very much less than 1, then depending on how you have your format defined, it may appear that ‘C’ is not changing, when it actually may be.

[pbj]

The actual function that I'm attempting to debug is V=sqrt(1-((t-m*T)/(y*T))^2)), where m, y, and T are predefined functions/variables. However, even starting at high versions of t (running a time course between 20-30s), I still have the same problem.

[Star Strider]

It may depend on what ‘m’ and ‘T’ and ‘y’ are, especially with respect to ‘t’.