RGB file type not supported


I'm having problems attaching a .rgb file as raster in MicroStation CONNECT edition v. 

Error message: "The file type is not supported - [12]."

I was able to attach this raster in older versions of MicroStation but now it seems that MicroStation does not recognize the file. I don't know how old this .rgb file is but I'm wondering if MicroStation stops recognizing files of certain age with new releases? RGB is listed as one of the file types in Attach Raster Reference dialog.

Is there a way to attach this rgb file so I can use it in my project?