How To Fix AD305 - Field type &-& must be CHAR or NUMC

AD305 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 305

• Message text: Field type &-& must be CHAR or NUMC

What causes this issue?

The (check) field, to which the foreign key of this table is added,
is not one of the foreign key fields assigned to the primary key
fields.

System Response

How to fix this error?

The check field must be taken into account when defining foreign key
fields.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD305 - Field type &-& must be CHAR or NUMC ?

  The SAP error message AD305 indicates that there is an issue with the field type in your ABAP program or data dictionary. Specifically, it states that the field type must be either CHAR (character) or NUMC (numeric character), but it is currently set to something else.
  
  Cause:
  
  Incorrect Field Type: The field in question is defined with a data type that is not CHAR or NUMC. This could happen if you are trying to use a field with a different data type (like DEC, FLOAT, etc.) in a context where only CHAR or NUMC is allowed.
  Data Dictionary Definition: The field might be defined incorrectly in the data dictionary (DDIC) or in the structure/table definition.
  Program Logic: The program logic may be attempting to perform operations that require the field to be of a specific type, but the field is not defined accordingly.
  
  
  Solution:
  
  Check Field Definition: Go to the data dictionary (transaction SE11) and check