SAP Message SIW093 - Structure &2: Field description &1 is invalid (see longtext)

Diagnosis
The configuration of the structure object &v2& is inconsistent. Use theDATATYPE fields LENG, DECIMALS, and DDTEXT only if your structure fieldis a predefined type.
In that case ROLLNAME must be Initial.

System Response
The generation of structure object &v2& is not possible.

Procedure
Correct the configuration of the structure field description &v2&.Either specify a predefined type in the DATATYPE fields LENG, DECIMALS,and DDTEXT or specify a component type by using the ROLLNAME field.