How to fix TolX in fmincon?

Holle, I have some problem associated with fmincon. Thank you for helping.

(1). The feedback is "Optimization terminated: no feasible solution found. Magnitude of search direction less than 2*options. TolX but constraints are not satisfied" If I try to adjust the value of TolX by setting optimset, the results can not be proved. So, do you have some experience?

(2). I tried to track the iterative values of design variables, following the instruction of

options=optimset('outputfcn',@outfun,)

and

 function stop = outfun(x,optimValues,state,)

the feedback is given as

"At compilation, "history" was determined to be a variable and this
 variable is uninitialized.  "history" is also a function name and previous versions of MATLAB would have called the function.
 However, MATLAB 7 forbids the use of the same name in the same
 context as both a function and a variable."

How can I fix the problem to obtain iterative results?

[Walter Roberson]

? Which MATLAB version are you using? And could you show us how you are calling fmincon? Is "history" something that occurs in your code, or is it complaining about some Mathworks-provided code?

[Sargondjani]

about the feasibility: there is a recent discussion in the newsgroup on feasibility. check it. if you have an initial poitn that is feasible, than you should get a feasible solution... but i guess there is no (trivial?) solution for your problem