Hi, This is another potential bug. Unfortunately I currently cannot reproduce it on smaller programs. I tried to do heap profiling on the following code: http://www.psdlab.org/~scm/hx.tar.gz The main program is hxpc.hs. I tried to compile it with hmake -nhc98 -p hxpc and run it on a small sample input scm$ cat > temp.xml <a><b><item>123</item></b><c></c></a> scm$ ./hxpc temp.xml Bus error scm$ ./hxpc temp.xml +RTS -p Segmentation fault Increasing the heap size does not seem to help. If I compile the program without the -p option, it runs fine. Since Malcolm Wallace has already profiled the program on his machine, it seems to be a platform specific problem I installed NHC98 1.18_4 using Darwin Ports, on a PowerPC G4 based Mac, running OS X 10.4 and GCC 4.0. sincerely, Shin-Cheng Mu