In one application program is entered via a series of blocks.
It turns out that the 2015 version in some blocks on the specific error screen below appears:
I opened my drawings with AutoCAD 2007 release, I exported to DXF.
The DXF is created with defective because not noAutoCAD2007 it opens.
I used the "Explode" command and then "purge" command in order to leave the file bloc "lighter".
But when opening the file with AutoCAD2015 acotece this error.
If someone can help me, thank you in advance.
Dionei