How to create sales invoice in batch

Just now i have checked sales invoice batch create and batch update.
How to add items in here? How can i add line custom field data?
in batch update items are showing as some code like (alpha numeric) character.
and batch update showing as blank.

In batch update Line custom fields showing in one column as System.Collections.Generic.Dictionary`2[System.Guid,System.String]
this code (i have 2 fields). In batch create showing blank.
Guide please.

Read guides

Thanks. :slight_smile: