How To Fix SY448 - Complex table fields cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 448

• Message text: Complex table fields cannot be changed

What causes this issue?

Complex table fields cannot be changed, since it is not possible to
enter new field contents in a simple way.
Internal tables and object references are regarded as "complex".

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can change a nested internal table by double-clicking the relevant
component in the table display and making the changes in the field
display.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.