http://dev.exiv2.org/issues/1305 Index: exiv2-0.26/src/pentaxmn.cpp =================================================================== --- exiv2-0.26/src/pentaxmn.cpp +++ exiv2-0.26/src/pentaxmn.cpp 2017-10-24 11:34:45.756609611 -0400 @@ -1167,6 +1167,8 @@ std::ostream& PentaxMakerNote::printShutterCount(std::ostream& os, const Value& value, const ExifData* metadata) { + if ( ! metadata ) return os << "undefined" ; + ExifData::const_iterator dateIt = metadata->findKey( ExifKey("Exif.PentaxDng.Date")); if (dateIt == metadata->end()) {