Return codes of RDIST

Can any body please tell me the return codes of RDIST tool?

I am using RDIST (through an UNIX script) to synchronize files between two servers say ukblx151(source) & ukapx050(target).
RDIST raises an alert mail (through notify option) in case of success & also failure but there is a problem if the target host is not availabel RDIST aborts but doesnt raise any alert. So i need to check the return code of RDIST command through $? (which is the return code of last command).

Regards,
Vishal