Do you have Media descriptor attribute in your Image model class? 
[MediaDescriptor(ExtensionString = "jpg,jpeg,jpe,ico,gif,bmp,png")]
public class ImageFile : ImageData

Regards
/K

Hi K Khan,

Thanks for your quick response. Yes I have MediaDescriptor defined. Have it on ImageFile and VideoFile, GenericMedia does not have any.

Thanks,

Karan

What class does ImageFile inherit from?

Hi Mari,

Code is like

[ContentType(GUID = "0A89E464-56D4-449F-AEA8-2BF774AB8730")]
    [MediaDescriptor(ExtensionString = "jpg,jpeg,jpe,ico,gif,bmp,png")]
    public class ImageFile : ImageData


Thanks,
Karan

Hi Karan,

Declaration looks correct to me, another possible reason can be in code some where  you are trying to load Image and converting it to PageDat e.g.

contenLoader.Get<PageData>(ContentReference) as PageData
where ContentReference is a reference of image 

Regards
/k

Hi,

Any maybe the index contains obsolete data. 

You could try to reindex it manually using: http://[Site address]/EPiServer/CMS/Admin/IndexContent.aspx

Hi Grzegorz,

Thanks for your reply, I shall check that.

Thanks,

Karan

Hi Guys,

Thank you all for your help. Figured out what the actual problem was, we had installed Find and Search both on our site. So after I disabled Find as the search provider. Search started working in edit mode. Hence it seems find was causing this conversion problem.

Thanks a lot for your response and time. God Bless You

Thanks,

Karan

I meet this error message, too, and in my situation @K Khan is correct:

contenLoader.Get<PageData>(ContentReference) as PageData where ContentReference is a reference of image