SAP FMPP_CHECK_INVOICE_REF Function Module for forbid to change invoice reference for FMPP partial payment
FMPP_CHECK_INVOICE_REF is a standard fmpp check invoice ref SAP function module available within SAP R/3 or S/4 Hana systems, depending on your version and release level. It is used for forbid to change invoice reference for FMPP partial payment processing and below is the pattern details for this FM, showing its interface including any import and export parameters, exceptions etc. there is also a full "cut and paste" ABAP pattern code example, along with implementation ABAP coding, documentation and contribution comments specific to this or related objects.
See here to view full function module documentation and code listing for fmpp check invoice ref FM, simply by entering the name FMPP_CHECK_INVOICE_REF into the relevant SAP transaction such as SE37 or SE38.
Function Group: FMPP_UT
Program Name: SAPLFMPP_UT
Main Program: SAPLFAGL_CHECK_DOC
Appliation area:
Release date: N/A
Mode(Normal, Remote etc): Normal Function Module
Update:

Function FMPP_CHECK_INVOICE_REF pattern details
In-order to call this FM within your sap programs, simply using the below ABAP pattern details to trigger the function call...or see the full ABAP code listing at the end of this article. You can simply cut and paste this code into your ABAP progrom as it is, including variable declarations.CALL FUNCTION 'FMPP_CHECK_INVOICE_REF'"forbid to change invoice reference for FMPP partial payment.
TABLES
YBSEG = "document line items(old)
XBSEG = "document line items(new)
TABLES Parameters details for FMPP_CHECK_INVOICE_REF
YBSEG - document line items(old)
Data type: FBSEGOptional: No
Call by Reference: Yes
XBSEG - document line items(new)
Data type: FBSEGOptional: No
Call by Reference: Yes
Copy and paste ABAP code example for FMPP_CHECK_INVOICE_REF Function Module
The ABAP code below is a full code listing to execute function module POPUP_TO_CONFIRM including all data declarations. The code uses the original data declarations rather than the latest in-line data DECLARATION SYNTAX but I have included an ABAP code snippet at the end to show how declarations would look using the newer method of declaring data variables on the fly. This will allow you to compare and fully understand the new inline method. Please note some of the newer syntax such as the @DATA is not available until a later 4.70 service pack (SP8), which i why i have stuck to the origianl for this example.| DATA: | ||||
| lt_ybseg | TYPE STANDARD TABLE OF FBSEG, " | |||
| lt_xbseg | TYPE STANDARD TABLE OF FBSEG. " |
|   CALL FUNCTION 'FMPP_CHECK_INVOICE_REF' "forbid to change invoice reference for FMPP partial payment |
| TABLES | ||
| YBSEG | = lt_ybseg | |
| XBSEG | = lt_xbseg | |
| . " FMPP_CHECK_INVOICE_REF | ||
ABAP code using 7.40 inline data declarations to call FM FMPP_CHECK_INVOICE_REF
The below ABAP code uses the newer in-line data declarations. This allows you to see the coding differences/benefits of the later inline syntax. Please note some of the newer syntax below, such as the @DATA is not available until 4.70 EHP 8.Search for further information about these or an SAP related objects