SAP Message RSAR492 - Field name & is too long (length > 16 characters)

Diagnosis
Field names in the transfer structure can be a max of 16 characters long
. Field name &v1& in transfer structure &v2& has a length of &v3&.
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System Response
The system terminates activation of the transfer rule.

Procedure
Choose a field name with a length of maximum 16 characters.
If the transfer rule is one provided by SAP, contact SAP Support.