Install Builder error

Error message from Install Build

LabView 2014 on Windows 7

What might this mean?

Call Library Function Node in NI_MDF.lvlib:MDFProdInfoList_Close.vi->CDK_DistParts_GetInstalledProducts_CORE.vi->CDK_DistParts_GetInstalledProducts.vi->CDK_Validate_DistParts_2010.vi->IB_MSI.lvclass:Engine_PreBuild.vi->IB_MSI.lvclass:Build.vi->CDK_Engine_Main.vi->CDK_Build_Invoke.vi->CDK_Build_Invoke.vi.ProxyCaller