SAP S_CUS_ACTIVITY_XREF Function Module for Where-used list for activity
S_CUS_ACTIVITY_XREF is a standard s cus activity xref SAP function module available within SAP R/3 or S/4 Hana systems, depending on your version and release level. It is used for Where-used list for activity 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 s cus activity xref FM, simply by entering the name S_CUS_ACTIVITY_XREF into the relevant SAP transaction such as SE37 or SE38.
Function Group: S_CUS_ACTIVITY
Program Name: SAPLS_CUS_ACTIVITY
Main Program: SAPLS_CUS_ACTIVITY
Appliation area: S
Release date: N/A
Mode(Normal, Remote etc): Normal Function Module
Update:

Function S_CUS_ACTIVITY_XREF 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 'S_CUS_ACTIVITY_XREF'"Where-used list for activity.
EXPORTING
ACTIVITY_ID = "
EXCEPTIONS
NOT_USED = 1
IMPORTING Parameters details for S_CUS_ACTIVITY_XREF
ACTIVITY_ID -
Data type: CUS_ACTH-ACT_IDOptional: No
Call by Reference: No ( called with pass by value option)
EXCEPTIONS details
NOT_USED -
Data type:Optional: No
Call by Reference: No ( called with pass by value option)
Copy and paste ABAP code example for S_CUS_ACTIVITY_XREF 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: | ||||
| lv_not_used | TYPE STRING, " | |||
| lv_activity_id | TYPE CUS_ACTH-ACT_ID. " |
|   CALL FUNCTION 'S_CUS_ACTIVITY_XREF' "Where-used list for activity |
| EXPORTING | ||
| ACTIVITY_ID | = lv_activity_id | |
| EXCEPTIONS | ||
| NOT_USED = 1 | ||
| . " S_CUS_ACTIVITY_XREF | ||
ABAP code using 7.40 inline data declarations to call FM S_CUS_ACTIVITY_XREF
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.| "SELECT single ACT_ID FROM CUS_ACTH INTO @DATA(ld_activity_id). | ||||
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