I wanted to convert a bunch of NEF (Nikon camera RAW files) to JPG with IrfanView (I remembered it had such an option), but it wouldn't work—it started the batch but just gave errors like:

Error! Can't load [file name here]

Without any further explanation.

When I tried to just open NEF files, it gave another error:

Can't load PlugIn: "FORMATS.DLL"

This is despite the fact that I had formats.dll in the Plugins directory as instructed.


It turned out that the Irfanview website still lists the 32-bit plugins as default on their website, and it's not clear at all that this won't work for the 64-bit version of IrfanView (it's not clear that there are 64-bit plugins in the first place, but also the site actually says that most 32-bit plugins will work automatically).

Formats.dll is one of the plugins that needs to be downloaded in its x64 version. Their website has a link to 64-bit plugins in the plugin page, so if you are running Irfanview x64, make sure to get that.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.