Hi Simon,
For new Cash Management in Simple Finance, total tables FDSB/FDSR is not used anymore. You can't search out data from them.
Since you implemented note 2255996, I suppose you are on Simple Finance 1503 (sfin 2.0). In this release until current latest support package:
For MM and SD, data will be recorded in classic line item tables like FDM1, FDM2. please ensure configuration for planning level for logistics is done and check these tables. This is same as classic cash management.
But for FI documents like invoice, data won't be recorded in line item table FDFIEP anymore, instead in One Exposure(table FQM_FLOW). Please make sure you activate FI component in One Exposure in customizing and then check table FQM_FLOW. You can refer to online help documentation and EKT documentation for One Exposure, which is data model for new Cash Management.
BR, John