Smartforms Program Lines Error - Field "TITLE" is unknown. It is neither in one of the specified tables nor defined by a "DATA" statement.

Error in Program Lines named GET_FORM_TITLE
Field "TITLE" is unknown. It is neither in one of the specified tables nor defined by a "DATA" statement.

Here is the example ABAP code within the Program Lines named GET_FORM_TITLE which I use to display the smartforms report title on the page.

The error is indicating that the field "title" is unknown which means it is undefined.
The error indicates the solution in itself also.
It is neither in one of the specified tables nor defined by a "DATA" statement.

If you have not defined variable "Title" in the Global Settings > Global Definitions > Global Data tab, Smartforms developers will get the above error message.

Besides declaring title variable in the Global Data, you should also set define the title variable in the Output Parameters list of the Program Lines ABAP code block you are getting the error exception.