The file is invalid and cannot be imported (saving from 2011 / 2012)

[davidetrovati.com]

Impression does not open files saved or exported from  autocad/architecture rel. 2011 and 2012,

This is the error message "The file ".........." is invalid and cannot be imported
someone has a trick?
Hello everyone

[rpritchard]

Mine recently started doing the same thing.  When I try to import a dwg. from AutoCad Architecture 2012 it almost immediately thows up that error message saying "The file is invalid and cannot be imported".  I've installed the hotfix for Windows 7 and until about the last 2 or maybe 3 days it was working fine.  No problems.  I've even uninstalled and re-installed the program with no effect.  If there is some one out there that has some kind of a fix, I'd really like to find out about it.  Thanks.

[TexShalter]

Have you tried saving to an older version from autocad ?

[davidetrovati.com]

try to export the file for autocad (not A_architecture) may verify that there are objects with different colors from the pallet standard, the old 256 colors!,
let me know.

[sstefanc]

I just came across this error and thread... I haven't expanded everything yet but the idea of the colors causing this seems to work. I have a file I saved down to 2007 and it still failed on the import.  However, I have a solid hatch in there that is true color... that may cause the problem?  I will have to explore.

[Peter_Hughes · Accepted solution]

SOLVED

The problem is non-standard colours for line colours.

We had a single polyline with a DIC colour. Once we deleted this one polyline, our CAD file imported just fine.

[gjcbachman]

I found this just in time.  Two of us spent almost 3 hours trying to figure out why a 2013 drawing saved back, stripped of everything and even dxf'd the file still wouldn't work.  After finding this post I found 3 layers set to true color, changed them and now it works.  Now hopefully we can come up with something that looks decent in the next hour.  Thanks!

[ylchen]

CAD 上色時不要用漸層色，要用單一色(256色) ，這樣就可以成功打開了

[rk.33190]

Hi Peter! What is DIC colour? i still cant figure out why it will not import.