Just to see what happens, I enabled warnings in C4/Reserves.pm. All of the warnings were of the form Subroutine * redefined at C4/Reserves.pm line *. This is happening because of circular dependencies, e.g. C4/Reserves.pm uses C4::Members C4::Circulation Those modules in turn use C4::Reserves. None of the functions used in these modules is actually called in C4::Reserves, but removing the calls to use C4::Members and use C4::Circulation from C4/Reserves.pm isn't enough, apparently there's a deeper circular dependency there. I suspect that there are a number of unnecessary 'use' statements peppered throughout the C4 namespace; cleaning those up might fix the problem entirely, or at least allow us to resolve any remaining circular dependencies easily. --Barton