Hi, I am using the IDL routines READ_NDF and WRITE_NDF provided with the convert package. I believe there is a bug that has crept into recent (perhaps also not so recent) releases including star-2014A (also present in nanahope). Error message : % Compiled module: READ_NDF. IDL> test=read_ndf('J1614-1906_spectrum.sdf') % READ_NDF: The library file: /scratch/home/sramsay/star-2014Alib/convert_idl.so.0 Does not exist. % Execution halted at: $MAIN$ The problem seems to be solveable by an adjustment of LIB_NAME in the read_ndf.pro and write_ndf.pro files. Replace: LIB_NAME = getenv('STARLINK_DIR')+'/convert_idl.so.0' with: LIB_NAME = getenv('STARLINK_DIR')+'/lib/convert_idl.so.0' With best wishes, Suzie ---- Starlink User Support list For list configuration, including subscribing to and unsubscribing from the list, see https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=STARLINK