https://userapps.support.sap.com/sap/support/knowledge/en/3691093
3691093 - FKKBIXBIT_CONF: incorrect sort order of z-fields in BIT class extension | SAP Knowledge...
FKKBIXBIT_CONF: Extension of the BIT class with new Z-fields leads to incorrect sort order. The field sequence differs between the configuration and the...
https://userapps.support.sap.com/sap/support/knowledge/en/3481895
3481895 - FKKBIXBIT_MON and FKKBIX_BILLREQ: Maximum selection limit | SAP Knowledge Base Article
In transaction FKKINV_MA when a huge amount of billable items is selected memory dumps can arise due to the selected amount. In transaction FKKBIX_BILLREQ when...