If a data format conversion request should fail, TPESVCFAIL is returned to the calling TUXEDO application in the variable tperrno. See BEA TUXEDO Reference Manual for more information regarding tperrno, tpcall() or TPESVCFAIL. In addition, an FML32 buffer containing additional diagnostic information is returned to the calling TUXEDO application. This FML32 buffer contains two string fields ELINK_ADAPTER_ERR_CODE, and ELINK_ADAPTER_ERR.