New Post: No such file or directory @ error/pdf.c/ReadPDFImage/713

Hi again!

I have updated to the latest version and I haven't get the previous error, but now when I run the application in two different computers I get this error Object reference not set to an instance of an object when I create Dim horizontal As MagickImage = images.AppendHorizontally()
I have checked that the 'images' object is not nothing and the pdf is also created.

What could be the problem?

Thanks in advance.