SAP Function Module search on GM_CH
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GM_CHANGE_DOCUMENT_READ_CLASS - Read Change Document Header
GM_CHANGE_DOCUMENT_READ_PROGR - Read Change Document Header
GM_CHANGE_STATUS - Obsolete
GM_CHECK_ASSIGNMENT_RULES - Check GM Assignment using Derivation Tool
GM_CHECK_AUTHORITY_CLASS - Check Authority Class
GM_CHECK_AUTHORITY_PROGRAM - Check Authority Class
GM_CHECK_GM_FM_DERIVED_VALUES - Check relationship between GM and FM Derived Values
GM_CHECK_GRANT_NUMBER - Get and or validate the grant number for grant creation
GM_CHECK_LEDGER_IN_BUKRS - Check if the ledger is assigned to Company Code
GM_CHECK_NAME - Check if name is valid
GM_CHECK_SPONSOR_FOR_GRANT - Check Sponsor in Grant vs. Posted-to Customer
GM_CHECK_VALUE_TYPE - Check Value Type's Validity for Grant
GM_CHOOSE_NEXT_STATUS - Change status of grant
Return Table index