I understand external32 support is not fully implemented, but anyway I want to raise your attention on this inconsistency. See the attached file for code (BTW, I'm using 3.0rc1). Using "long", I get: $ ./a.out Conversion of types whose size is not the same as the size in external32 is not supported Aborting with internal error However, using "double", the call succeed, but a pack->unpack roundtrip gives bad results: $ ./a.out a.out: pack-ext32.c:42: main: Assertion `input==output' failed. Aborted (core dumped) Plese fire up a debugger for the latter case and check the value of "input" before and after the unpack call, I'm not sure what's going on. -- Lisandro Dalcin --------------- CIMEC (INTEC/CONICET-UNL) Predio CONICET-Santa Fe Colectora RN 168 Km 472, Paraje El Pozo 3000 Santa Fe, Argentina Tel: +54-342-4511594 (ext 1011) Tel/Fax: +54-342-4511169