Hi Anil,
please follow the instructions from reply 1 und download a template for "project documentation" to you local computer.
In the txt-file you can specify in columns "I" and "K" path&filename and documentname for files, you want to upload. These files have to be places on your local computer and will be uploaded together with the TXT-file to Solution Manager, if you choose "Upload file" in the transaction. You have to be in change mode for the project to have upload functions available.
Kind regards,
Christoph