Saw this message:
Error Loading Stdm.lhs in Haskell platform 2012
Iwan Awaludin awaludin at gmail.com
Tue Sep 4 07:08:20 CEST 2012

and that helped past that error. But now I get

[1 of 1] Compiling Stdm             ( .../Discrete/Stdm02142015.lhs, interpreted )

.../Discrete/Stdm02142015.lhs:1036:40-46:
    Not in scope: `catch'

.../Discrete/Stdm02142015.lhs:1048:40-46:
    Not in scope: `catch'
Failed, modules loaded: none.

This is on ghci 7.6.3


lb