I converted the .tif file to 8bit and it opened into TVP10 ok. It's strange that a PSD 16bit opens ok in TVP but not a 16bit TIFF file? I have a whole sequence of 16bit frames i am using as a guide so this is why i'm not that keen to have to convert back and forth.
Argh, this is getting really frustrating as I keep having to convert file formats to accommodate for TVPAs quirks.
So TVP doesn't seem to favour the use of tiffs (16bit it just ignores and doesn't convert to 8bit as it does with PSD). So I now use 8bit psds but then when I'm trying to get in layers with correct alpha it seems that tiff 8bit files is the only way to get them in? These are standard file fomats. I don't have any problems with file formats in other software so this is something that is v frustrating if using multiple software on a project. I do not want to waste time converting file formats back and forth.