3dsmax9_sp2 Patch\3dsMax9_SP2_32bit.msp 3dsmax.exe SOFTWARE\Autodesk\3dsmax\9.0\MAX-1:409 Error, could not open 3ds Max installation path registry key. Error Code: Error, could not query key. Error Code: Error: This patch does not update 3ds Max 9 Extension 1: Productivity Booster.