How To Fix MC755 - Joins han de definirse mediante clave externa.

MC755 - Overview

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 755

• Message text: Joins han de definirse mediante clave externa.

¿Qué causa este problema?

Join conditions were freely defined for a view. The current view type,
however, only permits joins which were defined with foreign key.
Tables containing no join conditions are also not allowed.

El sistema emite un mensaje de error y no le permitirá continuar con esta transacción hasta que se resuelva el error.

Respuesta del sistema

¿Cómo arreglar este error?

Normally the ABAP/4 Dictionary only permits the entry of freely defined
join conditions for database views. The current situation occurred due
to the change in the view type.
Choose the base tables with a foreign key relationship for all views
except for database views. The foreign key relationship is then used as
the join definition.
&NOTE&
The information that the join might have been derived from a
foreign key is not stored for database views. In this case you should
remove all the tables except for one. Use the 'Relationships' function
to include the tables after successfully converting the view type.

Extracto de mensaje de error del sistema SAP. Copyright SAP SE.