How to identify YML parse error

I'm getting the following error when I boot my rails 3.1.3 application:

psych.rb:148:in `parse': couldn't parse YAML at line 28 column 9 (Psych::SyntaxError)

I'm guessing it is related to YML file syntax.

The problem appears when I try running:

YAML.load_file "..."

From another rails 3.1.3 application and YMLs are loaded just fine.


The syntax is covered here:

An online parser, which may help you troubleshoot, is here:

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