I don't know exactly how, but suddenly I get cabal errors. If I do cabal update there are no errors, everything is fine. Cabal install caball-install => cabal: internal error when reading packages index: could not read tar file entry. The package index or package cache is probably corrupt. Running cabal update might fix it. Every install or update shows the same error message. I'am using win7 64 bits, Haskell platform 2013.2.0.0. If i do cabal - - version => cabal install version 1.18.0.2 using version 1.18.1 of the cabal library. On Google the advice is to clear the directory c:\users\<user>\appData\roaming\cabal empty. But that removes all my packages. Isn't there an easier way? I have never used cabal sandboxes (at least not on purpose) Kees