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Determination to require "assignment to CO object"

Hi all,


2 equal G/L accounts and cost elements Y and X.

When posting through e.g. FB01 to Y booking is accepted. When posting to X, I receive the error "account needs assignment to co object", which we all know.

I've created 2 new accounts (FS01/KA01) referencing one from Y and one from X. After that both new accounts receive the same error. So even when referencing from the account Y (which doesn't provoke the error) I do get the error with the new account.

We do have a substitution in place (and no validations), which automatically assigns CO for the accounts, but it doesn't make it to begin to check the substitution rules. Because, if it would, it would now which CO to use (I've added the new accounts to the rule).

Now my questions.

1) How can it be that with account Y no check for CO is done and for all other cost elements created afterwards check is done. Solution I know (enter e.g. default CO in KA02), but I don't understand why the check isn't done with the first account.

2) What check is done before going to substitution rules & validation?

Thanks for your help as always,


Former Member
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