I tested a very simple example.
The result is that nothing is displayed at all, no folder, no views.
What am I missing or where is the error?
First a Folder Management Pack:
<Manifest>
<Identity>
<ID>Dashboard.Folder</ID>
<Version>1.0.0.1</Version>
</Identity>
<Name>Dashboard Folder</Name>
<References>
</Manifest>
<Presentation>
<Folders>
<Folder ID="Dashboard.Folder.Folder" Accessibility="Public" />
</Folders>
</Presentation>
<LanguagePacks>
<LanguagePack ID="ENU" IsDefault="true">
<DisplayStrings>
<DisplayString ElementID="Dashboard.Folder">
<Name>Dashboard Folder</Name>
<Description>Folder for custom Dashboards</Description>
</DisplayString>
<DisplayString ElementID="Dashboard.Folder.Folder">
<Name>Dashboards</Name>
<Description>Folder for custom Dashboards</Description>
</DisplayString>
</DisplayStrings>
</LanguagePack>
</LanguagePacks>
</ManagementPack>
And next another MP with only a view, referencing the folder:
<Manifest>
<Identity>
<ID>custom.dashboard.1</ID>
<Version>1.0.0.1</Version>
</Identity>
<Name>custom dashboard 1</Name>
<References>
<Reference Alias="Alias6">
<ID>Dashboard.Folder</ID>
<Version>1.0.0.1</Version>
<PublicKeyToken>6a2ac1bf7a9994e9</PublicKeyToken>
</Reference>
</References>
</Manifest>
<Presentation>
<Views>
<View ID="custom.dashboard.1.Microsoft.Windows.Computer" Accessibility="Public" Enabled="true" Target="Windows!Microsoft.Windows.Computer" TypeID="SC!Microsoft.SystemCenter.AlertViewType" Visible="true">
<Category>Custom</Category>
</View>
</Views>
<FolderItems>
<FolderItem ElementID="custom.dashboard.1.Microsoft.Windows.Computer" ID="custom.dashboard.1.Microsoft.Windows.Computer.FolderItem" Folder="Alias6!Dashboard.Folder.Folder" />
</FolderItems>
<Presentation>
<Views>
<View ID="custom.dashboard.1.Microsoft.Windows.Computer" Accessibility="Public" Enabled="true" Target="Windows!Microsoft.Windows.Computer" TypeID="SC!Microsoft.SystemCenter.AlertViewType" Visible="true">
<Category>Custom</Category>
</View>
</Views>
<FolderItems>
<FolderItem ElementID="custom.dashboard.1.Microsoft.Windows.Computer" ID="custom.dashboard.1.Microsoft.Windows.Computer.FolderItem" Folder="Alias6!Dashboard.Folder.Folder" />
</FolderItems>
</Presentation>
<LanguagePacks>
<LanguagePack ID="ENU" IsDefault="true">
<DisplayStrings>
<DisplayString ElementID="custom.dashboard.1">
<Name>custom dashboard 1</Name>
</DisplayString>
<DisplayString ElementID="custom.dashboard.1.Microsoft.Windows.Computer">
<Name>custom dashboard 1 Microsoft Windows Computer</Name>
</DisplayString>
</DisplayStrings>
</LanguagePack>
</LanguagePacks>
</ManagementPack>