What are derived files in Eclipse?

Question

I have problem with derived files. Some of my files in my project are \'derived\'. When I want to edit these files, I get the following message:

"This f

Answer 1

I faced with the same problem during editing Latex documents in TexLipse plugin. Accidentally, I was not able to modify my documents although before this 5 minutes ago I had had this possibility. To overcome the problem I simply deleted the project from the workspace and imported it once again. The checkbox of derived files was not checked.