[texhax] Chnaging the number of columns and page break

[Habib Seifzadeh]

Hi dear friends,

Nowadays, I'm writing a paper which its .cls file isn't consistent with multicols package. So, I'm forced to use \twocolumn and \onecolumn to change the number of columns.
The problem with that commands is that after using them, LaTeX breaks current page. How can I use them without any page breaking?

Thanks a lot,
Habib