Out of inodes means that you can't create any new files in that directory.
It would help if you posted some info about the filesystem in question. Like, How it was created? what file type it is? etc... .
Generally, if you must define inodes when the filesystem is created, the only way that I know to fix it is to save your data, blow away the filesytem and recreate and increase the # of inodes by 2x.