How To Fix TD490 - Function module '&1' does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: TD - SAPscript: Text editor, composer, forms, styles and fonts

• Message number: 490

• Message text: Function module '&1' does not exist

What causes this issue?

A function module is specified in table TTXIE for the INCLUDE exits.
The system has determined at runtime that this function module does not
exist. You also receive this message if the table contains an entry for
a text object and the name of the function module is set to its initial
value.

System Response

The system terminates.

How to fix this error?

Check the entries in table TTXIE and, if required, create a function
module as described in the documentation.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.