On Oct 3, 2011, at 12:11 PM, mrivera wrote: > bison -p xslpattern_ -o xslpattern.tab.c -d xslpattern.y > xslpattern.y:74: unrecognized: %parse_param > xslpattern.y:74: Skipping to next % > xslpattern.y:75: unrecognized: %parse_param > xslpattern.y:75: Skipping to next % > xslpattern.y:76: unrecognized: %lex_param > xslpattern.y:76: Skipping to next % > make[1]: *** [xslpattern.tab.h] Error 1 > make: *** [dlls/msxml3] Error 2 The problem here is that your version of bison is too old. Try again after installing a newer bison. Chip