RS_BCT_XA_X_NODE_DEL_RELATION is a standard SAP function module that performs Delete Releation functionality. This is available within standard R/3 SAP systems depending on version and release level.
Below are the pattern details for this FM showing its interface including any import, export and tables parameters. There is also a list of Exceptions and for your convenience any standard documentation available. All this information and more can also be viewed if you enter the function module name RS_BCT_XA_X_NODE_DEL_RELATION into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION 'RS_BCT_XA_X_NODE_DEL_RELATION' "Delete Releation
EXPORTING
i_t_nodes_rel = " rsxa_t_nodes_rel Node Releations
IMPORTING
e_subrc = " sy-subrc Return Value of ABAP Statements
* TABLES
* e_t_message_x = " rsxsa_s_message Message Structure RFC
. " RS_BCT_XA_X_NODE_DEL_RELATION