File attachment problem in Services for object in SAP

This error indicates that the document to be attached is open by you or you are missing a S_GUI authorization for the Value 60. If you have missing authorisation, you can find it out using SU53 transaction.

Object     S_GUI      Authorization for GUI activities
Field name ACTVT      gokautomaat Activity you should have values 60 (for Import…this is required for the attachment) and 61 (for export) both hese values checked for Import and Export respectively.