The partial project item type does not have a value for this property

When you faced error  "The partial project item type does not have a value for this property."

Its due to
"Visual Studio is now released, so you might want to consider upgrading to RTM. It was released a while ago. This is most likely a bug in the VS2012 RC "

Solution:
Modified the "SharePointProjectItem.spdata" to  added the value SupportedTrustLevels="All"  SupportedDeploymentScopes="Web, Site"   in the <ProjectItem>.

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