"Well thanks to the typo I can tell that this is occuring when the program tries to create a backup directory. It will try to create a Dirctory called "Data_backup" in the same directory as the data directory. If it is happening on startup it would be trying to do this to the Last mod you viewed. Is there any reason a program would not be able to create a directory on you machine?"
Not that I know of.
"Actaully now that I think about it I think someone else had some problems because they had their mods in a directory that was differenct from the usual ...Space Empires 4\ModName\data."
Not this either.
"Yea definatly the order new things go into the Treeview is not necessarily the same as in the data files. I'll have to test it a bit but I think things get saved right in the text file."
The end of the file wasn't the right spot in this case.

It was way down from where the first component was.]
Phoenix-D