IT_TABLE Is not a Database Table - SE51

Hi All,

I am trying to create a screen in SE51 which will take in a table and output one of the fields as rows of text and allow the user to assign data to each row.

However when I try to create the screen (which I am basing off screen 200 on SAPMZLT10W) it tells me that my internal table is not a database table. However in SAPMZLT10W it doesn't appear to be one either.

Has anyone encountered this issue before?

Many thanks for any help provided, points awarded.

Regards,

Colm