Oh !*^% it's an outstanding shared_ptr bug: if you define BOOST_SP_USE_PTHREADS both when building regex and again in your application this problem will go away. I'll go off and nag the people responsible ;->
Well, surprisingly enough (because, as I understand it, gcc on HP-UX does not support multi-threading), that worked! Thanks for your help, John! Matt ************************************************************************* The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank you. *************************************************************************