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Initial category is invalid error while running Locaton Hueristic

Folks

While running Locaton Hueristic, system is throwing and error '"Initial category is invalid". I had created a copy of 9ASNP02 PA, PB and DV, added a new KF and assigned a new categry group to this KF under all the aggregates. It was running fine but lately I am seeing this error. ANy ideas on what could have gone wrong and how to resolve this ?

Initial category is invalid
Message no. /SAPAPO/OM_ERROR2820

Diagnosis
An application program called an LCA routine. This led to an error.

Procedure
Contact your system administration.

Procedure for System Administration
Contact SAP Service. Specify the application component in which this message occurred.

You must also enter:

The message number
Return code 19020 (om_atp_initial_cat_not_valid)
Error code ATP

Former Member
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