bundler - middleman server error with 'listen' 3.0.3 gem instead of 2.10.1 -

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i'm running on windows 8.1 , try run 'middleman server' (with gem version 2.4.8 , middleman version 3.3.12). when doing following error (see below appendix full error message): " have activated listen 3.0.3, gemfile requires listen 2.10.1"

yet gem 'listen' not explicitely written in gemfile, must dependency else.

so did explicitely add in gemfile :

gem 'listen', '~> 2.10.1'

and run again

$bundle install

yet when run again '$middleman server' not work. in terminal check version of 'listen' gem have , see it's : 

c:\users\edouard\desktop\stylus>bundle show listen c:/ruby22/lib/ruby/gems/2.2.0/gems/listen-2.10.1

would have lead on how solve ? because don't have clue..

appendix - whole error message : 

c:\users\edouard\desktop\stylus>middleman server warn: unresolved specs during gem::specification.reset: rack (< 2.0, >= 1.0, >= 1.0.0, >= 1.4.5) uber (~> 0.0.4) activesupport (>= 3.1, ~> 4.1) ffi (>= 0.5.0) warn: clearing out unresolved specs. please report bug if causes problems. c:/ruby22/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:34:in `block in setup': have activated listen 3.0.3, gem file requires listen 2.10.1. prepending `bundle exec` command may solve this. (gem::loaderror) c:/ruby22/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:19:in `setup' c:/ruby22/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler.rb:127:in `setup' c:/ruby22/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/setup.rb:8:in `<top (required)>' c:/ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require' c:/ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:69:in `require' c:/ruby22/lib/ruby/gems/2.2.0/gems/middleman-core-3.4.0/lib/middleman-core/load_paths.rb:29:in `setup_load_paths' c:/ruby22/lib/ruby/gems/2.2.0/gems/middleman-core-3.4.0/bin/middleman:10:in `<top (required)>' c:/ruby22/bin/middleman:23:in `load' c:/ruby22/bin/middleman:23:in `<main>'

i had same trouble: middleman server error 'listen' 3.0.3 gem instead of 2.10.1.

try remove /gemfile.lock , exec bundle install.

that worked me.


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