Failure in initial nonlinear constraint function evaluation. FMINCON cannot continue.

This is the quadrotor dynamic problem in which i am trying to minimise power and desired final distance error using fmincon. Can anyone help me in determining what is the problem inmy nonlinear constraints. Thank you. I have attatched files.

Error in nlc (line 16)

c(1:4*T,1) = X(20*(T+1)+1:20*(T+1)+4*T,1)+vb;

Error in fmincon (line 633)

[ctmp,ceqtmp] = feval(confcn{3},X,varargin{:});

Error in mainfcn (line 15)

X=fmincon(@obj,Xg,A,b,Aeq,beq,lb,ub,@nlc);

Caused by:

Failure in initial nonlinear constraint function evaluation. FMINCON cannot continue.

[Torsten]

You must give a value to T in mainfcn.m before calling "fmincon".

[Kartik Loya]

thank you. @Torsten.