SAP Note 16457 - Material type PROD not recognized as product group

Symptom:

Problems occur when you maintain or display product groups because material type PROD is not defined as product group.
For example, the system generates error message MA151, "No material type exists for product groups in table T134".
(This results, for example, in no matchcode records being displayed for the product group.)

Cause and prerequisites

The system does not recognize material type PROD as product group because it is not defined as such in material type table T134.
(You can check this with transaction SE16. The 'Grouping Indicator' field must contain the value "1".)
This situation is caused by the grouping indicator (field KZGRP) incorrectly being reset automatically if you change material type PROD when maintaining the material types.

Solution
The error is corrected in Release 2.2E.

Additional key words

MA151, MC87