CMake Error at .*/Modules/ExternalData.cmake:[0-9]+ \(message\):
  Data file referenced by argument

    DATA{Data.txt,:}

  corresponds to path

    Data.txt

  that does not match regular expression

    \(x\)\(y\)\$
Call Stack \(most recent call first\):
  .*
  BadSeries2.cmake:3 \(ExternalData_Expand_Arguments\)
  CMakeLists.txt:3 \(include\)