I have been using version 3.0 to convert 2D PDF drawings to 2D DXF files which I then copy and paste into AutoCAD Version 2022 LT for further work.

It as been pretty good so far.

Just recently purchased version 4.0 and did the same process.

I can get a DXF file produced which I open in AutoCAD but I am unable to do a Copy to File to take that drawing into the main AutoCAD drawing.

I get a message from AutoCAD saying "Copy to Clip Board Failed"

I have experimented several times with both 3.0 and 4.0 versions and only the 3.0 version will allow me to copy to clipboard.

Researching AutoCAD resources on the internet tells me it is a corrupt file or a third party application issue.

Tim (TimTab)