PROBLEM: Setup was run from Compact Disk released OCT 2003.BillQuick2003 setup gets installed successfully. User gets the following error on starting BillQuick2003 application. Error : Strong name validation failed for assembly 'Ingragistics.Win.UltraWinSchedule'. ( at Billquick2003.frmMain.InitializeComponent() at Billquick2003.frmMain.ctor() at Billquick2003.frmMain.get_Deflnstance() at Billquick2003.mdlGDatabase.gp_GetCompanyInfo()) Error Occurred: Object reference not set to an instance of an object. ( at Billquick2003.mdlGDatabase.gp_GetCompanyInfo() at Billquick2003.mdlGDatabase.gf_AfterConnection(frmSplash& ObjSplash,String strDBPath,String strConnStr) at Billquick2003.mdlMain.main()) at Billquick2003.mdlGDatabase.gp_GetCompanyInfo() at Billquick2003.mdlGDatabase.gf_AfterConnection(frmSplash& ObjSplash,String strDBPath,String strConnStr) at Billquick2003.mdlMain.main() SOLUTION: Please download the OCT 2003 Patch setup. Patch will install automatically and fix the corrupted dll Note: Incase you have selected a different destination directory for BillQuick2003 installation, make sure you point the setup to correct destination folder.