RepliShow - BTranslationUtils compile error

I am trying to compile RepliShow from http://www.haiku-os.org/documents/dev/replishow_a_replicable_image_viewer

it gives an error:
/boot/home/projects/RepliShow/(Objects.RepliShow)/RepliView.o: In function `RepliView::MessageReceived(BMessage *)':
RepliView.cpp:(.text+0x479): undefined reference to `BTranslationUtils::GetBitmap(char const *, BTranslatorRoster *)'
collect2: ld returned 1 exit status

RepliView.h contains:
#include

the code in RepliView.cpp is:
fBitmap = BTranslationUtils::GetBitmap(path.Path());

looks perfect (for humble myself at least), fBitmap, path, all fine.

Where is the problem?

Thanks,

P