I downloaded the SGI implementation of the STL because I wanted to use a few of the extras (SLIST, new ALLOCATORS, etc). When I added these includes to my project, I get hundreds of include errors ranging from problems with the IOSREAM class to everything else. Then I went back to the reg STL version and everything worked fine. So I then tried to just add one of the headers (such as SLIST) to the reg STL and got hundreds more (literally) or redefinition errors... Anyone else have this problem? If so, how did you fix it? Thanks in advance..