Diagnosis
You want to edit a Treasury business partner that is used in anapplication that references the corresponding SAP BP. Since there is noparallel maintenance between SAP BP and TR BP, any changes that you makehere are not copied to the corresponding SAP BP. As soon as you migratethe RE Classic application into flexible Real Estate Management (RE FX),the changes are lost.
The message is defined as an error message by default meaning that theTR BP cannot be edited. However, you can change the settings so thatthis message is a warning message. It is then possible to edit the TR BPdespite the constraint mentioned above. See SAP Note 944765.