Hello! I have posted this message before, but no answer. Now, after a few upgrades, I still have the same warning messages. I am a bit worried, since I do not know does this affect or could affect R. I use R under Linux (Ubuntu 6.06). After start, and after loading few libraries, I got following message: Warning messages: 1: In namespaceImportFrom(self, asNamespace(ns)) : replacing previous import: cov2cor 2: In namespaceImportFrom(self, asNamespace(ns)) : replacing previous import: xtabs Is this harmful? Can I do something to fix that? Sincerely, PM