Table of Contents breaks file running [closed]

Question

I have a file, which works fine, if there is no table of contents, however, while trying to compile this file with added \tableofcontents command, compiler tells me:

myfile.toc 2 LaTeX Error: Something's wrong--perhaps a missing \item.

What's the solution?

edited:

I've just found that \tableofcontents are not in good relations with section's renewing:

\makeatletter
\renewcommand{\section}{
    \@startsection
        {section}{1}{0mm}
    {\baselineskip}%
    {\baselineskip} 
    {\fontsize{14}{14}\centering\bfseries\MakeUppercase}        
   }%
   \makeatother 

If I remove this renewing, \tableofcontents makes no problem. So this probably makes the problem clear?

Answer 1

Please make a minimal example that demonstrates the problem to make it easier for you I'm putting this as an answer rather than a comment so I can add a formatted example

\documentclass{article}

\makeatletter
\renewcommand{\section}{
    \@startsection
        {section}{1}{0mm}
    {\baselineskip}%
    {\baselineskip} 
    {\fontsize{14}{14}\centering\bfseries\MakeUppercase}        
   }%
   \makeatother 

\begin{document}

\tableofcontents

\section{aaaaa}

asa

\section{bbbb}

\end{document}

this document runs without error, please edit your question to add a version of this example that does demonstrate the problem.