( SAP Online help for DBT)
Generally there are some points need to check.
1, DBT generating rule setting Under customizing: SPRO->Financial Supply Chain Management -> Treasury and Risk Management -> Transaction Manager -> General Settings -> Accounting ->Derived Business Transactions ->Control of Processing of Derived Business Transactions.
Offline or Status of Plan maybe set here. So you need to run TPM18/TPM27 to check it. 2,position management procedure setting Sometimes the PMP used for the position is not correct. Or the customizing of PMP is incorrect. 3,Position Change Category setting For the orinigal business transaction which will generate the DBT flows, if the PCC is not set correctly or not set at all, DBT maynot be updated.
4,DBT generation period setting Under customizing SPRO->Financial Supply Chain Management -> Treasury and Risk Management -> Transaction Manager -> General Settings -> Accounting -> Organization -> Assign Accounting Codes and Valuation Areas
There are two fields there which can control the DBT generation period for performance consideration. They also need to be checked.
1653788 – Performance: Derived business transactions update period
1769446 – Performance: Derived business transactions update period II
2125958 – Derived Business Transactaions are not fully generated for securities positions