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:[0-9]+ \(ExternalData_Expand_Arguments\)
  CMakeLists\.txt:[0-9]+ \(include\)
