please check to have not c4d shaders in your missing materials, they are not supported in both Standalone and ORC/RNDR.
If you have c4d shaders in your scene, that are not c4d Noise o Gradient nodes, they are baked on the fly into texture to make them work with Octane, but Standalone cannot have this option.
If you go to c4doctane Settings/C4D Shaders, you can disable the Auto Baking into texture option, and enable only the OSL option for c4d Noise and Gradient:
In this way, you should have the same result in both Live View and Standalone, and you can correct your materials removing the not supported c4d shaders.
Hope it helps,