I am trying to make network analyses through Matlab by using EPANET-matlab class ((https://github.com/OpenWaterAnalytics/epanet-matlab). I am running EPANET in a loop for several times and at some point it gives me the warning of " Too many open files" resulting from the files created after each EPANET run with names such as "s48c.1a" and the program closes itself. When I try to delete those files in each loop, it doesn't give me the permission to delete them until I close and reopen MATLAB. How can I solve this problem? Is there any way that I can delete them?