This hotfix addresses issues related to deleting or modifying walls, a crash may occur.

Make sure to download the correct patch for your operating system (32 or 64 bit) and Revit build number.

Download the 32-bit version using the following link:

http://images.autodesk.com/adsk/files/20090917_1515_revit_2010_wall_modification_hotfix_x32.zip

Download the 64-bit version using the following link:

http://images.autodesk.com/adsk/files/20090917_1515_revit_2010_wall_modification_hotfix_x64.zip

For more information please refer to the following readme:

http://images.autodesk.com/adsk/files/20090917_revit_2010_hotfix_wall_modifcations_readme.htm