The values entered and calculated in a PI sheet are displayed on the overview screen of the PI sheet.
For each of these values, a process message exists that is used to report the value to process management. To obtain more detailed information about the individual messages, you can display a detail screen for each of them containing the following information:
Header data such as the message category, sender, and time of creation
All characteristics and their values including those that were obtained from the PI sheet or entered automatically by the system
All long texts created for the message
See: Displaying Process Messages in ABAP List-Based PI Sheets