DRP runtime issue with libraries

[MarkDurre]

Hi, I've got an issue with running the DRP on our 'nix machine OZSTAR supercomputer. The library seems to compile OK (using a modifies local_Makefile in the "source" directory), but I get the error

% Compiled module: BIN_DATE.
% DRPBACKBONE::ERRORHANDLER: ERROR in drpBackbone::ErrorHandler - -390: CALL_EXTERNAL: Error loading sharable executable. 
Symbol: osiris_wait_on_sem_signal, File = /fred/oz054/mdurre/apps/idl/idl_apps/OsirisDRP/modules/source/libosiris_drp_ext_null.so.0.0
libidn.so.11: cannot open shared object file: No such file or directory

We have libidn.so.12 version in our library; is there anywhere I can fix this?
Cheers