I found it somewhat disconcerting when I looked at the debugging output from hat-c.c that it showed many entResults and no resResults. This may be an issue of personal style, but this patch was useful for me. It adds a print in resResult to match the one in entResult. Noah Lavine --- hat-c.c 2006-11-15 05:45:17.000000000 -0500 +++ hat-c.c 2008-06-15 18:18:14.247202914 -0400 @@ -1805,6 +1805,7 @@ LastExp = node; node &= hiddenMask; result &= hiddenMask; + HIDE(fprintf(stderr,"\tresResult 0x%x 0x%x 0x%x 0x%x\n", node, result, use, ntohl(node)+1+sizeof(FileOffset)+(use?sizeof(FileOffset):0));) hat_reduce(ntohl(node),1+sizeof(FileOffset)+(use?sizeof(FileOffset):0), result); }