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The 3D Model is spart for the DIAdem Professional version and not supported in the Advanced version.
Please keep also in mind that DIAdem 11.1 was released in 2008 and was only tested for Windows VISTA and before. Since that time, we provided 9 main releases as well as 10 service packs. Since DIAdem 2015 we provide DIAdem as a 64-Bit version and since DIAdem 2019 we stopped supporting the 3D Model in VIEW.
If you are using a current Windows version, I would recommend to have also a look at a current DIAdem version.