asking for running SIMLR

hi,
I am sorry, I not good at matlab. because my cell number are with more than 3,000 cells, so I want to use the the function called "SIMLR_LARGE". I change the "SIMLR_LARGE" to "SIMLR_LARGE" in the clusteringCells.m, but I run the scEpath_demo.m that had an error the function "mex_top_eig_svd" can not identify. would be very grateful indeed for any help you could give me.