Problems when I compute

Dear all,
I really new student learning how to use Dynare. When I make a estimataion using ML on dyanre, I come up with problem:
Configuring Dynare …
[mex] Generalized QZ.
[mex] Sylvester equation solution.
[mex] Kronecker products.
[mex] Sparse kronecker products.
[mex] Bytecode evaluation.
[mex] k-order perturbation solver.
[mex] k-order solution simulation.

Starting Dynare (version 4.2.0).
Starting preprocessing of the model file …
ERROR: D:\Paper\Code.mod:50.25: syntax error, unexpected $undefined, expecting COMMA or ‘)’
I don’t know why.
I really appreciate your help.
Code.mod (1006 Bytes)

It says that the character in line 50, column 25 is invalid. You can’t use square brackets in Dynare.