A bit of information from Craig Huckabee (huck@nosc.mil) regarding building Rivet on HPUX: I had to tweak the makefile to get everything to build (adding some include and library paths and -DEAPI) Apparently that rivet_module [this is from an error he was getting - davidw] came from one of the steps described in the Apache documentation for installing a DSO. I rebuilt and redid the steps and now it appears to work OK. My next test will be using some of the tcl extensions and seeing how well they work. I also have to track down and beat out a linker problem with Tcl itself. I had to add -lm to your makefile to include the math libraries when linking against my Tcl build which is wrong. Somewhere along the way, while building Tcl, that library isn't being linked in correctly (at least that's what I think). Just one of the joys of building on HP-UX I guess.