Hi I'm a new GMS user. I'm working on a model developped on GMS 4.0; I'm now using the GMS version 6.5, and i d'like to be sure that the errors that modflow is showing are not due to a problem of incompatibility between the versions 6.5 and 4.0 ? After the running of MODFLOW, the following message error appear: "error reading eo** " (non sens characters), and after clicking OK, a new message error appears : " premature end of file "name of my file".CCF " . Thank you for your help Raoul