These are the files required to compile prologio on VMS. y_tab.c compile with 2 warnings, but the rest compile without any. you only need to compile prorpc.cc //only if you want RPC apparently read.cc y_tab.c strdup.c //vms doesn't seem to have a strdup lex_yy.c get included by y_tab so doesn't need explicit compiling. The yacc and lex files were generated on OSF/1 and then hand tuned for VMS, please feel free to correct any errors, and get rid of any warnings. Nick