fmincon-Optimization running. Error running optimization. Not enough input arguments.What do I do??

I am using method of lines for solving system of pde's, when I use fmincon to minimize my kinetic parameters, I often get the above mentioned error.Kindly help.

[Stephan]

Based on the very detailed and numerous information that you have given us about your problem, it is safe to say that you have not given enough input arguments.

[Walter Roberson]

Perhaps you have given a function name in a place where a handle is expected. For example,

   integral(sin, 0, 2)

is not valid and instead you need

   integral(@sin, 0, 2)