How To Fix UMK842 - You have to display the master data assignment before data can be written

SAP Error Message - Details

• Message type: E = Error

• Message class: UMK - Measures

• Message number: 842

• Message text: You have to display the master data assignment before data can be written

What causes this issue?

Before you can write any data, you have to display the master data
assignments at least once.

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?

Display the master data assignments by choosing the <NP>Master Data</>
tab page.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.