Hi All, I have come across an bug with Demeter 0.9.10. When I go to open an old format Artemis project file I will see, "Converting old-style project file to Demeter serialization" written in the progress bar, and then the program will quit without opening the file. The problem occurs on both 32 and 64bit Windows 7. I uninstalled the program and reinstalled Demeter 0.9.9 and there are no issues with 0.9.9. The dartemis.log contains: Can't locate object method "inp_is_feff8" via package "Demeter::Feff::External" at C:/strawberry/perl/site/lib/Demeter/Fit/Horae.pm line 110. I hope this is helpful. It seems to be similar to the problem posted by Riamundo, and I hope that I have not missed a previously posted solution. Attached is one of the project files that I have used. Sincerely, Matt Frith