OPPE01: Color offset for material number length

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Symptom
For long material numbers (greater than 18), you cannot set the offset and length of the color key in Customizing. The system generates an error message stating that the offset and length of the color key is greater than 18 characters (maximum material length), E0 30.
Other terms
OPPE01, COL, PVS0C030, LAMA
Reason and Prerequisites
The problem [...]