Extended Check to and Preprocessing of Event Messages 
SAP Event Management (SAP EM) executes an extended check and preprocesses event messages to check or change required information within an event message.
If an event message fulfills certain criteria, SAP EM executes the checks or changes.
The following are possible criteria:
Event code
Event message sender
Event location
Tracking ID code set
By defining plug-in function modules, you can define further checks or changes.
You have defined the plug-in function modules that you use for the extended check and for preprocessing in the transaction for defining event message processing criteria (/SAPTRX/TSC0MBF).
By default, SAP EM checks the following information:
If an event code exists and is executable
You maintain the event code in Customizing.
For more information about internal and external event code Customizing, see the Implementation Guide (IMG) for .
If the information for identifying event handlers exists
If date and time information is available and if it is technically executable
The data structure of an attachment, if the event message contains an attachment
Note
SAP EM needs a line counter to ensure that the database key is unique.
If you want to perform further checks or preprocessing on an event message in addition to those mentioned here, you define the following: you define plug-in function modules in the transaction for defining criteria for event message processing (/SAPTRX/TSC0MBF).