Hi, getIP() is correct name, its not only this subroutine, whatever subroutines which were present in the /tmp/utils/Utili.pl perl script if i call in test2.pm iam getting the same error. the same subroutines are working if i call in test1.pm in both the modules, iam using the below lines to access the subroutines. require "/tmp/utils/Log.pl"; require "/tmp/utils/Utili.pl"; anything wrong iam doing here ???