SAP Message 64868 - Client &1: Account type &2 is not permitted for posting key &3

Diagnosis
Convert account determination: The posting key &V3& of account symbolV4 is assigned to account type v1. this account type is notpermitted for the Treasury Securities area. You may only use customeraccount types (D) or G/L account types (S).

System Response
The posting category of account symbol &V4& with posting key &V3& cannotbe converted.

Procedure
Assign a different account type (D or S) to posting key &V3& or refrainfrom using this posting key in account determination for Treasurysecurities. You then need to run the conversion program again!