Very interesting : it works with your "AMSart" class [1], but not with \documentclass{minimal} \usepackage {AMSmath} ** Phil. [1] \documentclass{amsart} -------- Nina Mazumdar wrote: >> I see no line where the \cline contruct occurs; >> do you see one, Nina ? > > Yes Sir, I do. Please take a look at the attached files. > > Best regards