Address usage gets deleted by adding a telephone via BAPI

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Symptom
While updating the communication details(telephone number,email,fax etc)by calling the standard FM BAPI BUPA_ADDRESS_CHANGE,standard number flag(FLGDEFAULT),home address flag gets updated to blank for the previous stored communication data and in case of telephone the value in R3_usage gets changed in table ADR2.
Other terms
BAPI_BUPA_ADDRESS_CHANGE BUPA_ADDRESS_CHANGE ADR FLGDEFAULT HOME_FLAG R3_USER R3 user flag
Reason and Prerequisites
Communication [...]

BAPI: tax data in ACCTX for Accounting Interface

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Symptom
You use a BAPI (for example BAPI_ACC_DOCUMENT_POST) and provide the detailed tax data in the separate interface table (for example ACCOUNTTAX). You observe that in the accounting interface function AC_DOCUMENT_CREATE the separate interface table T_ACCTX is empty but instead the tax data are all incorporated in interface table T_ACCIT having TAXIT [...]