Operation not possible (e.g. incorrect material type or plant)

What causes this issue?

It is not possible to access the user department required because not
all of the maintenance statuses have been entered for the plant in
Customizing, and/or for the material type. For example, if the
maintenance status D (material requirements planning) is missing for a
plant, all MRP screens are deactivated for this plant.

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?

Check the setting for the field <LS>Maintenance status</> in
Customizing for the <LS>Material Master</> in
<DS:SIMG.SIMG_CFMENUOLMSOMSA>Define reference for plant-specific field
+ screen selection</>. You can display the meaning of the maintenance
statuses by displaying the possible entries.

Error message extract from SAP system. Copyright SAP SE.