The function modules of function group XLFX provides user exits for customer-specific field checks. They are always called if header or item data has changed. The field selection can be used to override additional field attributes.

• Checks on permitted vendor/customer combinations
• EXIT_SAPLWLF2_002
• Special field checks at header and item level
• EXIT_SAPLWLF2_003, Field check, settlement request header data
• EXIT_SAPLWLF2_004, Field check, settlement reqest item data

Function/Program:
• EXIT_SAPLWLF2_002: Enhancement: Allowed Customer/Vendor Combinations
• EXIT_SAPLWLF2_003: Enhancement: Field Check Header Data Settlement Request
• EXIT_SAPLWLF2_004: Enhancement: Field Check Item Data Settlement Request
• EXIT_SAPLWLFN_001: Enhancement: Field Selection Settlement Request