COMMAND ${lyx} -E ${format} ${file}.${extension} "${LYX_ROOT}/${file}.lyx"
RESULT_VARIABLE _err)
string(COMPARE NOTEQUAL ${_err} 0 _erg)
-if(erg)
+if(_erg)
message(STATUS "Exporting ${f}.lyx to ${format}")
message(FATAL_ERROR "Export failed")
endif()