Most of the Configuration Manager 2012 systems I’ve setup so far use Microsoft SQL Server 2008R2. 2008R2 uses the Report Builder 3.0 not 2.0 and ConfigMGR 2012 natively uses 2.0. Hence if you try to select Create Report you might get the following error,
To get past this install Report Builder 3.0 , Report builder download here. Once you have installed Report builder edit the following registry key, HKLM\Software\Wow6432Node\Microsoft\ConfigMgr10\AdminUI\Reporting\ReportBuilderApplicationManifestName change the value from “ReportBuilder_2_0_0_0.application” to “ReportBuilder_3_0_0_0.application” on any machine you want to start Report Builder 3.0.