AutoCAD DWG and DXF to PDF Converter v2.2 failed to convert my DWG files to PDF files

I finally got the files to add. I've clicked all the filenames and one of them and then clicked the "Make pdf" button, named the file in the place I want it but nothing ever shows up. How do I get these files to convert so I can see if we want to purchase this program?

Customer
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Thanks for your sample DWG files, we will test with AutoCAD DWG and DXF to PDF Converter v2.2 shortly. In the meantime, we suggest you may download VeryDOC DWG to Vector Converter Command Line from our website to try, DWG to Vector Converter Command Line does support all versions of DWG formats, we hope this product will work better to you.

btw, I just tested these DWG files with VeryDOC DWG to Vector Converter Command Line software, these DWG files can be converted to PDF files without any problem, you may download VeryDOC DWG to Vector Converter Command Line from this web page and try it by yourself,

https://www.verydoc.com/dwg-to-vector.html
https://www.verydoc.com/verydoc_dwg2vector_cmd.zip

after you download it and unzip it to a folder, you can run following command line to batch convert all of your DWG files to PDF files properly,

dwg2vec.exe D:\downloads\*.dwg

Please look at following screenshot for a PDF file which converted from your DWG file,