The file r3fileinst.dll is the File Instance plugin of Realsoft 3D created by Realsoft Oy. Realsoft Oy is a Finnish company that created a ray-tracing and modeling program, Realsoft 3d, used to create photorealistic images.
The File Instance plugin creates an instance, which can be transformed or animated, from a specified project file. A problem with the r3fileinst dynamic link library will disable this plugin. Clean your registry to fix this issue.
Every time you run a program on your system, Windows uses the registry database to find the files that program needs and how to use those files to run your program. If the registry entry for a file is incorrect, your program will not run.
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