Hi toolic I am trying to give a particular directory for vhier to search for the include directories and libraries The usage is vhier +incdir+dir. This translates to what I give on the command prompt, I am in a directory just above i2c( vhier +incdir+./i2c --modules i2c_master_top.v).this gives that it cannot find i2c. I have tried a lot of options on the command prompt like vhier --II<./i2c> and vhier +incdir+I<./i2c>. This usage is mentioned in vhier script itself(downloaded from cpan version 3.110) wonder if you could throw some light on how to give the option for the include directories.would really appreciate it. thanks for your time