PM Complete allocation structure PM

Dear Experts .

I have checked all the entries of the PM allocation structure But the Error is coming again and again.

In the Explanation of the error is as Following :

Complete allocation structure PM

Message no. KD503

Diagnosis

During settlement, the system puts the sender debits into groups

(assignments), which are settled using the same settlement cost element.

The settlement assignment is made in the allocation structure, which is

stored in the settlement rule for the sender (under settlement

parameters).

Cost element 40050010 cannot be assigned to a settlement cost assignment

in allocation structure PM, and therefore it cannot be assigned to a

settlement cost element.

Procedure

Possible solutions are as follows:

o If the posting under cost element 40050010 was made to the sender

because of an incorrect entry, and you can reverse the posting, and

do not need to update the allocation structure. You only need to

reverse the incorrectly assigned posting before repeating the

settlement. Exception: For an investment measure with a line item

settlement, you need to extend the allocation structure, even after

the reversal.

If the posting was made correctly, you can do the following:

a) You can assign a different allocation structure to the sender:

In the master data maintenance for the sender, choose

"Settlement rule -> Goto -> Settlement parameters" and then

enter a different allocation structure.

If necessary, also check whether the correct allocation

structure is entered in the settlement profile. The allocation

structure is defaulted in the settlement profile when you

create sender master data or when you maintain the settlement

rule.

- You can update allocation structure PM.

i am Unable to get what should I do?

regards,

A S