Syntax error in program "CL_IBASE_IBOF_TREE============CP

Hello!

I am about to set up the Service Desk functionality.

Even if I execute Tcode IB52, enter "1" and push enter the ABAP runtime error occurs.

I have pacthed SOLMAN to SP13.

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Syntax error in program "CL_IBASE_IBOF_TREE============CP ".

Error in the ABAP Application Program

The current ABAP program "CL_IBASE_IBOF_OBJID===========CP" had to be

terminated because it has

come across a statement that unfortunately cannot be executed.

The following syntax error occurred in program

"CL_IBASE_IBOF_TREE============CP " in include

"CL_IBASE_IBOF_TREE============CCIMP " in

line 1777:

"Der Typ "CL_IBASE_IBOF_DRAG_DROP" ist unbekannt."

" "

" "

" "

The include has been created and last changed by:

Created by: "SAP "

Last changed by: "SAP "

Error in the ABAP Application Program

The current ABAP program "CL_IBASE_IBOF_OBJID===========CP" had to be

terminated because it has

some across a statement that unfortunately cannot be executed.

Termination occurred in the ABAP program "CL_IBASE_IBOF_OBJID===========CP" -

in "CLASS_CONSTRUCTOR".

The main program was "SAPLIBOF ".

In the source code you have the termination point in line 3

of the (Include) program "CL_IBASE_IBOF_OBJID===========CM003".

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Can some one help me here?

Thank you very much!

regards

Thom