We have a drawing template file that we've used forever. Over the last 12 months I've been updating and revising the drawing but nothing to extreme.
Recently I had to reinstall AutoCAD2018, there was an issue with the font library updating, and forgot to change the default file format to AutoCAD2013, which we use for our deliverable to avoid compatibility issues when issuing the data to our clients. Since then I must have saved the drawing template as a 2018 format and now I'm having issues saving it as a 2013.dwg.
Whenever I'm saving into 2013 I get the compatibility error message 'Save Drawing - Version conflict' and I've tried a couple of things to make it go away with no success :
EXPORTTOAUTOCAD - Exported as 2013 format and suffixed the file name with 2013, but if I open the file again and try to save it as 2013 it gives me the same error message, proxyshow set on '1' or '2' doesn't show me anything that is being proxied. If I've exported it as 2013 why would 2018 think it still needs to proxy stuff?
Saved as 2013.dxf - I get the error message when saving from 2018.dwg to 2013.dxf and when I open the 2013.dxf and save it as a 2013.dwg I still get the 'version conflict' message.
How can I identify the objects that require proxy graphics for backward compatibility? I can't think of anything I've altered in a way that would require proxying...and is there a way to check from outside of AutoCAD what version the .dwg is? file properties doesn't seem to have that level of information in windows 10.
edit : proxygraphics is set to '1'