Error Code 148 in CAD Viewer

I am using CAD Viewer 9 A. 24, but I am getting an error when I try to open an AutoCAD drawing.
First I get Error Code 148.
I click OK, but another error appears saying it doesn't support entities in the drawing (I have attached a screenshot of the said errors below).

Error. Could not load DXF/DWG file.
Error code: -148

CAD Viewer
Software doe not support entities in this drawing.
Or drawing is empty.
Or an error occurred.

About CAD Viewer
I tried upgrading to A. 30, but the error still shows up each time I try to open the drawing. I tried opening the same drawing from another computer using A. 10, and it opened without any problems at all.
Too bad I can’t attach a copy of the drawing in question due to confidentiality issues (maybe it can help solve the problem). But I am wondering, what could be the software feature differences between A. 10 and A. 24 that prevents the drawing from being opened?
Any ideas on how I can troubleshoot this problem?
