Enhancement Implementation - Operation not supported by the selected object

Hi,

I have created an Enhancement Implementation (EI) of Enhancement Spot BADI_ACC_DOCUMENT via transaction SE19. When activating the EI, the following message occurs and the EI is not activated:

Operation not supported by the selected object

Message no. SEU_MANAGER061

I have searched the forum and service marketplace for the message, but I still have no resolution of the problem. Any help is greatly appreciated.

Thank you.