Hello! ----------------------------START---------------------------------- $ sudo runghc Setup configure --user Configuring HCL-1.2... $ sudo runghc Setup build Preprocessing library HCL-1.2... Preprocessing executables for HCL-1.2... Building HCL-1.2... HCL.hs:302:7: Could not find module `System.Random': it is a member of package random-1.0.0.1, which is hidden $ sudo ghc-pkg expose random Saving old package config file... done. Writing new package config file... done. $ sudo runghc Setup configure --user Configuring HCL-1.2... $ sudo runghc Setup build Preprocessing library HCL-1.2... Preprocessing executables for HCL-1.2... Building HCL-1.2... HCL.hs:302:7: Could not find module `System.Random': it is a member of package random-1.0.0.1, which is hidden ---------------------THE-END---------------------------------------- Perhaps, i'm 1000th, who asks how to solve this. Sorry that didn't search better, but it's really tiring for a newby. :-( [ http://www.haskell.org/haskellwiki/Upgrading_packages/Updating_to_GHC_6.8 Here ] found something, which maybe called "a gentle explaination" of what's going on. I have ghc ver: 6.8.2, base ver: 3.0.1.0. So there are 2 questions of mine: (1) Is there any centralized and well organized Haskell Knowledge Base, where it would be much easier to find solutions for "popular" problems? Anybody, please, your recommendations. (2) As for the topic: the only option for me would be obtaining older GHC (base?) - is that correct? So that require me reinstalling every Haskell package I have installed so far? Thanks in advance. -- View this message in context: http://www.nabble.com/%22Could-not-find-module-...-which-is-hidden%22-proble... Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.