title: Error in Migrate from sql server to Mongodb: Specified cast is not valid
body: <p>Hi am new to migrating database from SQL server to mongodb. For this am using tool SQL2Mongo <a href="http://sql2mongo.codeplex.com/" rel="nofollow">http://sql2mongo.codeplex.com/</a>. am having 2 bak file which have backup-ed from sqlserver. am success in migrating one bak file from sql server to mongodb using sql2mongo tool. but for another file am getting an error "<strong>Specified cast is not valid</strong>".I am googled this error its because of not proper bak file or some data misses when backup-ing the bak file.</p>
  
  <p>I want to make sure error is the error only from bak file.</p>
  
  <p>Is any one know how to resolve this error or is there any other tool for migrating sqlserver to mongo db. </p>
  
  <p>thanks in advance.        </p>