Hello Guys! I am now fighting with HP to recognize that their compiler is buggy. I am one of their customer and would like to get help with this fight. I want to use the boost.org format and regex libraries on HP-UX 11.00 with aCC, and I got contacted the local HP office about that. I told that I want to use modern libraries like the "boost.org" library. They answered that the HP aCC is the implementation of the ISO/IEC 14882 standard of the C++ language. They provided two links about the compiler: http://www.software.hp.com/DTDC_products_list.html (follow the aC++ link). http://docs.hp.com/hpux/onlinedocs/2213/libs.htm#slIntro (introductionary concepts). Do you have any evidence that the HP implementation of C++ language breaks the standard and that's why the regex library and format library does not compile on those platform? (if you need sample error message, then I can send it to the list). I am using stlport 4.5-119, aCC A.03.33. Please Cc: the replies to my private email-address also. Thanks for your help in advance, dLux