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