Hi, Using VS6 building PJSUA from the 0.8.0 release failed on: 0.8.0\pjproject\third_party\milenage\rijndael.c(21) : fatal error C1083: Cannot open include file: 'pj/types.h': No such file or directory To fix this I changed the include path in project settings for project libmilenage from: ../../pjlib/include into: ../../../pjlib/include Regards, Arie Velthoen