in TexShop the log file shows the warning
label 'fig:InfExp' multiply defined
but in my .tex file this label appears exactly 3 times-- twice in \cite commands and, between these, once as a label definition in a figure environment.
when I retired from my Professor's job in 2001 I was fluent in latex. But I am now writing another paper. It's gone well up to now and I am close to done, TexShop won't typeset til I clear this warning this is my 4th day trying to fix it