Thomas Hartman wrote:
ghc-pkg list says a package is installed, but ghci won't load its module (HDBC-ODBC)
Any advice?
hartthoma@dbnycws28816 ~/haskellInstalls/HDBC-odbc-1.0.1.0 $ ghc-pkg list c:/ghc/ghc-6.6.1\package.conf: Cabal-1.1.6.2, GLUT-2.1.1, HAppS-0.8.4, HDBC-1.0.1, HDBC-odbc-1.0.1.0, HUnit-1.1.1, HaXml-1.13.2, OpenGL-2.2.1, QuickCheck-1.0.1, Win32-2.1.1, base-2.1.1, cgi-3001.1.1, fgl-5.4.1, filepath-1.0, (ghc-6.6.1), haskell-src-1.0.1, haskell98-1.0, html-1.0.1, mtl-1.0.1, network-2.0.1, parsec-2.0, regex-base-0.72, regex-base-0.91, regex-compat-0.71, regex-posix-0.71, regex-tdfa-0.92, rts-1.0, stm-2.0, template-haskell-2.1, time-1.1.1, xhtml-3000.0.2
.....
Prelude> :m + Database.HDBC.ODBC module main:Database.HDBC.ODBC is not loaded
It looks like your current directory contains Database/HDBC/ODBC.hs. Move to a different directory, and you should be fine. The reason this happens is that GHC finds Database/HDBC/ODBC.hs relative to the current directory, and assumes the module is therefore part of the "main" package (see the error message you got), which overrides the module of the same name from the HDBC package. And you can't :m to a module in the "main" package, it has to be loaded with :load. Cheers, Simon