Enter trading partner

What causes this issue?

No trading partner was entered in the current document, although
transaction type &V1& requires that you enter the trading partner
manually. In order for the posting to be made with the correct
transaction type in Asset Accounting, you have to enter a trading
partner before you continue.

System Response

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

How to fix this error?

Enter the partner by choosing 'Extras -> Trading partner.'

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.