The good thing with cucumber is that it will only run the files that have .feature on it and ignoring the rest.
The way I run my test is usually by running the whole folder which is something like this:
inside that folder I will have a mix of .manual and .feature files and folders.
Recently, I have been getting this error when I run my cucumber tests.
features/regression/postcode_details.feature:5:1: Parse error, expected one of "\n", "\r", "|", "\"\"\"", "#", "* ", "Given ", "When ", "Then ", "And ", "But ", "
@", "Scenario", "Scenario Outline". (Cucumber::Parser::SyntaxError
I check the feature file and everything looks ok. It actually took me a while to figure out that the mistake was just because I accidentally named a .manual file into a .feature file and thus the error as cucumber could not understand how to run a manual test. What an annoying mistake to make!