Daniel Carvajal

How do you end up with a Style that points to a file with quotation marks when those characters are not allowed as part of the file name by Windows?

As some other characters the quotation marks are not allowed as part of a file name, sometimes they are used by search engines as the characters * and ? but...

Under normal circumstances the visibility of an entity is controlled by the layer where it belongs.

Your file is pretty broken, it lacks the BLOCK_RECORD TABLE for the UNFOLD block. You can try it with Autodesk DWG TrueView it will show the same issue and will...

This second file you posted is new and different from the one in your first post. In this case the file has been saved as a pre-AutoCad2000 version. This library...

DxfObject is the base for all main classes, anything that requires a handle is a DxfObject. EntityObject inherits from DxfObject and is the base class for all objects that have...

You cannot. Groups can only contain entities and not other groups. On the other hand an entity can belong to multiple groups.

Please post your DXF. I didn't see any problems with files saved as 2004 generated by a later version of AutoCad. From what you wrote seems that the handle of...

I think you have uploaded the wrong file. It didn't give me any problems and it doesn't contain any layer state.

The problem here is not if that check is needed or not. I will add it just to avoid possible problems with bad handles, issue that it is the result...