It work great for 3 pdf then it suddenly stop working at 70-80%

[nos4r3]

It auto scroll & save perfectly for the first 3 file i use it but then the next one it stop when reach around 70-80% of the file

https://i.imgur.com/KOvXY4J.jpeg

Like this it stop at 928 but this one have 1304 page dunno why

I have to scroll it myself for the rest of the page and use another code to download them

or you can provide me the code for auto scroll only would be nice too since it work really great and i can play the game and do anything else while it auto scrolling