Sir, I got your mail id from net.I am software engineer. presently I am working in MIPS Malta board using redHat Linux.I am trying to porting some .c files and try to run that files , but the problem is like this I am useing 4 threads in my application .It is works in general Linux enviornment(pc).I am using thread say "pthread_create". At the MIPS Malta (red hat Linux)enviornment it is compiling linking but at the time of executing (exe file)it is giving error.It is returning value 11 I am using red hat linux 2.2.12 and MIPS cpu is "MIPS4kc" . Please give me some suggestion so that I can proceed regards Mukesh __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/