SAP Note 16782 - Key length of pooled tables

Symptom:

Key words: key length for pooled tables, table activator
When you create a logical pooled table with a key length > 110 bytes, the activator returns an error. The table is not activated.

Cause and prerequisites

The pool interface can only process pooled tables with a key length of 110 bytes or less. When the pool interface was implemented, this restriction was retained due to an existing SAA standard.

Solution
If the table has to be a pooled table, the only option is to reduce the key length.
For transparent tables, the key can be up to 251 bytes long. However, the complete functionality of the Transport System for transporting table entries is only guaranteed up to a key length of 120 bytes. If the key is longer, the table entries can only be transported generically, and cannot be specified using the complete key.