I used the same process as Merge PDF files.
But I got error:
"Could not find file 'C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Temp\q3zwe2sm.f2c\result.pdf'."
it seems it is trying to create a file or access that but it cannot.
There is C:\\Windows\\ServiceProfiles\\NetworkService\\AppData\\Local\\Temp\\ folder but there's not any folder or PDF file.
Please let me know what can I do.