CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
  Unknown option "RECURSE:x" in argument

    DATA{Directory1/,RECURSE:x,Data.dat}

Call Stack \(most recent call first\):
  .*
  BadRecurse3.cmake:2 \(ExternalData_Expand_Arguments\)
  CMakeLists.txt:3 \(include\)