Looks to me like /usr/bin/blastall crashed. The key line is this one:

MSG: blastall call crashed: 256 /usr/bin/blastall -p  blastn  -d  "/var/common/CGI-BIN/TCV-jagger.fna"  -i  /tmp/Qs5Y9sAFLK  -o  /tmp/Rk2ttOzUih

Most likely that "256" is the return code from blastall - that might give you a clue to why it crashed. If the blastall code is Perl we might be able to help you debug further, but I'm guessing that it's probably not.

-sam