v4.pl and java error message

Hi, I encountered the following error message. Can anyone help me please ? For the java problem, where can I tell i-tasser to find the correct path?

Argument "e-107" isn't numeric in numeric lt (<) at v4.pl line 356.
sh: /usr/java/latest/bin/java: No such file or directory
Illegal division by zero at /home/user/protein/wMUSTER_protein line 552.
hostname: linux