Error in colSums(x) : 'x' must be an array of at least two dimensions

Hi Prof. Poisot

I got this error when I used "findModules". I input an adjacency matrix with same number of rows and columns, which was transformed from a plant-pollinator bipartite matrix. I tried your example in "findModules" but found the same error. Is it an intrinsic problem or what?

Sincerely, 
Hanlun  