Icons next to files

[SQLJ]

Is there a comprehensive list to detail what all the icons mean that show up next to a file. I have an exclamation mark next to some files and i was wondering what that meant.
Thanks

[lbauer]

An exclamation mark usually means there is a problem with file. Could you post a screenshot of what you are seeing?

If the exclamation mark is in a yellow triangle, it means the file is in the project or referenced in the project file, but is not available on disk.