Include MP56RFEX for User Exits
In include MP56RFEX of module pool SAPMP56R (Travel Management) there are various user exits (form routines):
FORM USER CHECK
The Statutory trip type, Enterprise-specific trip type and Trip activity type fields can be validated in dialog according to the customer’s criteria.
FORM USER_EVAL_RECEIPT
Here receipt-specific changes in receipts can be defined. These changes are however only made if the user exit is started explicitly in dialog for a selected receipt (menu path: Extras
® User exit receipt).This user exit can only be started from receipt entry and single record entry.
FORM EX_BTEXT
Here receipt texts, for example, can be checked and supplemented for receipts according to customer criteria.
FORM EX_GET_NUMBER
Here the number range intervals for internal number assignment can be specified for employees according to customer criteria.
The company code of the employee may, for example, be used to determine the number range interval in HR master data instead of the personnel area.
FORM EX_TEST_NUMBER
Here number range intervals for external trip number assignment can be specified for employees according to customer criteria.

USER DATA: Screen 9999
This screen is fixed in the Travel expense manager menu under Display travel data ® Extras.
Here you can enter personal default data. This data must already have been defined in the PTK99 structure. In turn, the PTK99 structure defines the USER table in which the data is then stored in the database.
Screen 9999 is not to be used for programming your own 'call screen 9999' or 'set screen 9999' calls.