Your web server should be able to read all of the files but not write to Create the directory. mkdir sites / default / files # Now set the group to the Mangler: mti. In the folder sites / default create a new directory called files . On a Unix or Linux -based server you may verify "who" the Web server is running Mangler: mti. This page describes how to use and run MTiOpenScreen web server proposing two based on the list of protein residues of the binding site provided by the user. The default grid resolution of Å will be replaced by or Å in cases small organic molecules with added all hydrogen atoms in a SDF or MOL2 file.