File Checkout function unusual

It finally checkout the file like this,

"Checkout" is an old concept, I don´t think it still works for Innovator 12. This one is a more modern variant:

// Get file
var fileItem = aras.getItemById("File", "1234566....");
// Download file
aras.downloadFile(fileItem, "myfile.zip");

"Checkout" is an old concept, I don´t think it still works for Innovator 12. This one is a more modern variant:

// Get file
var fileItem = aras.getItemById("File", "1234566....");
// Download file
aras.downloadFile(fileItem, "myfile.zip");

Thanks Angelalp for always being here!

I tried downloadFIle function and turns error. Actually if I change the suffix of "vaultserver.aspx " as it is, such as(.dwg), then open it, which I found out it is the file I exactly downloaded. And now the question is why the checkout file is named "vaultserver.aspx by using checkout fuction.

Thanks,

Jen