Codesoft Exception "Open Document" (ActiveX) to open two labels: "0x80010105: COMexception error

[PincoG]

I'm trying to use CODESOFT to print labels choosed by the operator.

when I try to load the second one, I get an exception 0x80010105.

What am I doing wrong? What reference have I to keep outside the loop?

I connected LPPd2.dll version 21.0.0.0, but I have the same result with previous versions.