User parameter &1 &2 has not been maintained

What causes this issue?

The system has determined that the user parameter TM_INVOICE_CLERK has
not been maintained.

System Response

In Logistics Invoice Verification in the transaction MR11, you can
balance the GR/IR clearing account for documents that refer to a
transportation management system.
To use these functions, you must first maintain the user parameter
TM_INVOICE_CLERK in your user master record.

How to fix this error?

Choose <LS>System</> -> <LS>User Profile</> -> <LS>Own Data</> or call
transaction <DS:TRAN.SU3>SU3</>.
On the <ZK>Parameters</> tab, enter the user parameter TM_INVOICE_CLERK
and enter the following values: <LB>Blank, 01</>, or <LB>02</>.
The user then sees the <LS>Transportation Management</> and <LS>PO
Reference</> tabs in GR/IR clearing account maintenance.
If the user parameter TM_INVOICE_CLERK is not included in your user
profile, you will see the initial screen as it is in the standard system
(with no tabs).

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.