text id doesnot exist error

hello all,

I am ujwal the text in me51n header.

But when i enter the details of the text

ID:B01

Lang:En

and name in so10 it says 'text id doesnot exist for text object Text'

I have to use it in smartform and when i'm using include text there also its showing same error

but when i am using Read_text Fm its working fine

But even this is throwing error if no text is maintained

Can anyone help please

Thanks

ramesh