On scriptmaster returned error

[Noél Dubau]

Hello

All is in my screencopy : In a script I send to openlibrary the isbn or the ean of a book. On rare books (about 10 on 6000) I have the following error

As the operation is long I use to thought it by night ; so I'd be interresed to avoid these message  ; an equivalent of the function of FM "On script error.."

Thanks !

PS I had asked some years ago but not kept the solution 😌