Puppet ruby error psych.rb

Cloud you please help me with the error:

DEBUG: 2015-02-11 10:34:43 +1300: Looking up puppet_master in YAML
backend

DEBUG: 2015-02-11 10:34:43 +1300: Looking for data source global

/opt/puppet/lib/ruby/1.9.1/psych.rb:203:in `parse’: (): mapping
values are not allowed in this context at line 26 column 50
(Psych::SyntaxError)

from /opt/puppet/lib/ruby/1.9.1/psych.rb:203:in `parse_stream’

from /opt/puppet/lib/ruby/1.9.1/psych.rb:151:in `parse’

from /opt/puppet/lib/ruby/1.9.1/psych.rb:127:in `load’

from
/opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend/yaml_backend.rb:18:in
`block (2 levels) in lookup’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/filecache.rb:53:in
`read_file’

from
/opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend/yaml_backend.rb:17:in
`block in lookup’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:104:in `block
in
datasourcefiles’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:76:in `block
in
datasources’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:74:in `map’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:74:in
`datasources’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:99:in
`datasourcefiles’

from
/opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend/yaml_backend.rb:16:in
`lookup’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:206:in `block
in
lookup’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:203:in `each’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera/backend.rb:203:in
`lookup’

from /opt/puppet/lib/ruby/site_ruby/1.9.1/hiera.rb:60:in `lookup’

from /usr/local/bin/hiera:221:in `’

On Tuesday, February 10, 2015 at 9:44:43 PM UTC,
[email protected] wrote:

Sounds like a syntax error in a yaml file (at line 26) although it’s not
telling you which file.

Fred