Attached files show up at the top of task records such as an incident. It is not common for us but you are able to rename the attachment. However, we were noticing that it would not allow us to rename the files. We would click rename and when you start to type, it would give us a popup message "Filename has reached the character limit of null". We are on Kingston patch 12 but I'm not sure how long this has been happening. Eventually I found that we had a UI Macro called "attachment_list_body" with a description of "Overriding this system file, IMPORTANT TO DELETE with future upgrades". In our development instance I set this UI Macro to Active=false and it corrected the issue. We can now rename attached files as expected because it is not using this legacy piece of code. We have been on ServiceNow a long time so newer users may not even have this macro.
