I am not sure if I’m blind but i believe you either have a bug in your code, or your help file is out of date.
take directly from your help-file the usage of PrintLargePdf.
"This method has integrated the opening and the printing of the file and you
need not calling the OpenPdfFile() explicitly."
Attached is a screenshot of the code with the error.
I have been able to replicate this with ALL my pdf’s both large and small.
I have tried using the OpenPdfFile and ClosePdfFile and those do remove the error, but i don’t get an output(print).
The normal print function does work for me.