Cluto Clustering - input file size


I have been attempting to perform clustering with a large input file using the scluster command. However, there is an error displayed stating that :"Graph file to be clusterd (clutoinputactcldcount.txt) does not exist!"

Would you know if there is size restriction on the input file to the Cluto clustering algorithm? If so , can you please let me know the size limit?

Thanks in advance.