c++ - convert TIF works, Magick++ read same TIF, ABORTS -

c++ - convert TIF works, Magick++ read same TIF, ABORTS -

i can utilize command line convert command transform some.tif else. when utilize read command in magick++ program, failes read same tif file, next message:

"terminate called after throwing instance of 'magick::warningcoder' what(): convert1: some.tiff: unknown field tag 33780 (0x83f4) encountered. `tiffreaddirectory' @ warning/tiff.c/tiffwarnings/768 aborted"

i compile c++ programme "c++ -o convert1 convert1.cpp magick++-config --cppflags --cxxflags --ldflags --libs"

can please point out doing wrong?

thank you,

c++ imagemagick-convert magick++