Plug ins and some PS filters not showing up

[Glenda]

When starting to process a photograph today I found my Nik and Topaz filters and not accessible. Their name is still there but not in bold when I click on filters. Have tried re-installing, restarting computer etc to no avail. They were working fine yesterday. Any ideas? Also noticed some of the PS filters such as oil painting are not showing up also.

[ricktas]

could be either the file format (ie it is not JPG, TIF, PSD) but some other type or you have changed the mode (menu : Image> Mode) If the file is in 32 bit mode a lot of filters and plugins will be disabled.

[Glenda]

Thanks Rick. I tried a different photo and they're back. The photo I was working with was a file opened directly from ACR, the only difference was that I'd converted to b&w within ACR for a change, even reopening it as a psd and no filters so can't understand it. Never mind will just convert after opening it in photoshop and should be all okay then.

[ameerat42]

Depends if you converted it to an RGB B/W, a greyscale B/W, or a 2-bit B/W.
It should be OK as the first type, but the other two exclude some operations.
Am.

[Glenda]

I used the greyscale button to start then adjusted whites/blacks/contrast etc so guess that's why they're not working. Very annoying.

[ameerat42]

OK, so it's still a greyscale. So those actions need 24-bit files at least.
It happens. I think all progs are similar.
Am.