How To Fix WTADDI443 - Additional &1 is not assigned to external additional &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 443

• Message text: Additional &1 is not assigned to external additional &2

What causes this issue?

The <DS:GLOS.3526BC3AAFAB52B9E10000009B38F974>procedure</> for an
<DS:GLOS.3526BC88AFAB52B9E10000009B38F974>additional</> can be assigned
externally by a customer. The external method must then be converted
into an internal method. External method &V2& and internal method &V1&
are not assigned to one another for customer &V3&.

System Response

INCLUDE ISR_VERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Check your entry.
You can <DS:TRAN.WTAD_FMCU_CHANGE>maintain</> or
<DS:TRAN.WTAD_FMCU_DISP>display</> the assignment of external or
internal procedures for additionals here.

Error message extract from SAP system. Copyright SAP SE.