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An Exception About Web Dynpro

Hi,

Now i run into a UI exception. which is as following:

com.sap.mw.jco.JCO$Exception: (104) RFC_ERROR_SYSTEM_FAILURE: No RFC authorization for function module **.

In the function module **, no authorization check at all.

I check the user autorization for the ABAP Backend, it have only the following roles:

SAP_BC_USER_ADMIN

SAP_J2EE_ADMIN

SAP_MT_SYSTEM_TEST

SAP_SLD_ADMINISTRATOR

What other roles are needed?

i am not familiar with Web Dynpro. Who can help me on the issue.

Thanks in advance.

Johnney.

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