Can't select cubemap

Hi there, I have a cubemap which I’m using in another project in a Reflective/Diffuse material . In another project, I’m using the same shader and material, but when I try and select the cubmap through the inspector, or indeed try and drag it from the project window, it won’t register as a valid selection - you get the ‘no entry’ icon(I can drag it in as a texture though). I"m obviously missing something as it works and runs well in another project - any suggestions?

Thanks!

you may have to import the textures, materials, etc. Then relink the files together.

It had lost the import settings, so it had reverted back to a texture (rather than ‘advanced’ in th importer settings.) Odd, but resolved!