Adding a file using Auto detect for file type can cause Performance Trouble for Hugh Text Files (like Rhapsody models or Vector Toolchain Files). Problem is a follow-up of Default used Option "store-by-delta".
For later usage there can be used existing Global Policy "Text Working File Size Governor (KB)" which allows a Limitation (compare Article CS135637), which is not valid for Function AddMember.
Having the possibility to use same restriction also for AddMember would avoid later converting of that member, what might cause high effort on the Server, and would it Substitute by using intended Setting while creating the Archive.
