Currently using Connect U12.
Save multiple will not save TIF format files. Any other works fine, ie png, jpg etc etc. but not TIF????
What render mode? I tested with Luxology and it worked for me.
Make sure you pick Tag Image File Format from the list ;-)
This is with luxology. We have now found that we can produce a tif, but only after changing the colour mode.
Initially this was set at RGB Alpha, which did not produce any results, changing this to RGB has produced results.