Cannot save file because the disk is locked. 

The disk is locked.

Too many files are open.

The file is locked for writing.

The disk is not a Macintosh disk.

Out of memory during file operation.

I/O error.

An error occured while positioning the file.

The requested file is not open.

The requested file was not found.

Cannot save changes to file because it is locked. Unlock it in the Finder.

The requested file is busy.  It cannot be used at this time.

File couldn't be opened because it is damaged.

Duplicate file error.  A file with this name already exists.

The disk is full.  Cannot save any additional files on this disk.

Directory full. Cannot save any additional files in this directory.

Bad file name error.

Unknown disk error.  The operation will be canceled.

Master directory is bad. You must initalize the volume.