<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi</div><div><br></div><div>I tried the erlcount example. when I downloaded the source code from website http://learnyousomeerlang.com/</div><div>Then when I run, I had a bad_return, any idea why?</div><div><br></div><div>-----------<span style="line-height: 1.7;">  </span></div><div>[jusfeel@localhost learn-you-some-erlang]$ erl -env ERL_LIBS "."</div><div>Erlang R16B02-basho5 (erts-5.10.3) [source] [64-bit] [smp:2:2] [async-threads:10] [hipe] [kernel-poll:false]</div><div>Eshell V5.10.3  (abort with ^G)</div><div>1> application:load(ppool).</div><div>ok</div><div>2> application:start(ppool).</div><div>{error,{bad_return,{{ppool,start,[normal,[]]},</div><div>                    {'EXIT',{undef,[{ppool,start,[normal,[]],[]},</div><div>                                    {application_master,start_it_old,4,</div><div>                                                        [{file,"application_master.erl"},{line,269}]}]}}}}}</div><div>3> </div><div>=INFO REPORT==== 19-Dec-2015::12:18:27 ===</div><div>    application: ppool</div><div>    exited: {bad_return,</div><div>                {{ppool,start,[normal,[]]},</div><div>                 {'EXIT',</div><div>                     {undef,</div><div>                         [{ppool,start,[normal,[]],[]},</div><div>                          {application_master,start_it_old,4,</div><div>                              [{file,"application_master.erl"},</div><div>                               {line,269}]}]}}}}</div><div>    type: temporary</div><div><br></div><div>3> </div><div><br></div><br><div style="position:relative;zoom:1">--<br><br><div><span style="font-size: 14px;"><span style="font-family: System;"></span><span style="font-family: Arial;">王 昊<br></span></span><span style="color: rgb(192, 192, 192);"><span style="font-size: 14px; font-family: Arial;">Hao </span><span style="font-family: Arial;">WANG</span></span></div><div><span style="font-size: 13px; font-family: Arial; color: rgb(192, 192, 192);">86 186 0086 9737</span><span style="font-family: Arial; color: rgb(192, 192, 192);"><br>为学日益 为道日损<br>http://blog.jusfeel.cn<br></span></div><br><br>  <div style="clear:both"></div></div></div>