i was using autodesk map 2014 trial version..later i installed 2012 version and accidently converted one file into older format... now the error is displayed.." database is compromised' how to solve it??

In the 2012 release, first run _MAPCLEAN with the following workflow:1) Explode all the polygons2) Extend undershoots3) Break Crossing Objects4) Erase Dangling Objects5) Erase short objects6) Snap clustered Nodes7) Delete duplicates8) Dissolve pseudo nodesOnce the drawing is _MAPCLEANed, rebuild a new topology with _MAPTPOCREATE, sir.