OK I understood. Changing the font that has this sign solved the problem.
\usepackage{savesym} \usepackage{amsmath, amsfonts, amsthm, amssymb} \savesymbol{iint} \usepackage{txfonts} % this is the font \restoresymbol{TXF}{iint} \usepackage{ucs} \usepackage[ansinew]{inputenc} \usepackage{textcomp}
Attention! The savesym package is now needed to avoid errors that iint is already defined.
Yours faithfully,
Hovhannes
ovanes
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