Hi Biswajit,I don't have any idea what is code 4. Also, there is really good SAP Help documentation available for setting up transport. I would recommend to follow those and later come to check out blogs if you face any issue.Also as Balanzs mentione...

Hi A D, Young Hwan Kim,In section 2.4, bullet point 5, where you were asked to set application type, please set it as HCP instead of CPI. And use the same Application type as ApplicationID in section 2.5.2 Configuring the Production System.