To using Tossim, 

1) 
cd /opt/tinyos-1.x/tools/java/org/python

make


2)
cd ../apache

make


To using GUI 

export DBG=usr1
/opt/tinyos-1.x/tools/java/net/tinyos/sim/tinyviz -run ./build/pc/mail.exe xx (The number of sensors)