Script body: ============================================== db.t.remove(); db.t.save({user:{fn: "Bob" ,ln: "Marley" },grades:[ "A" , "C" , 5, 1.4, {gr: "good" }],type:4}); db.t.save({user:{fn: "Chuck" ,ln: "Norris" },grades:[ "F" , "F" , 3.5, 4, {gr:[1,2,3]}], type:6.3}); db.t.save({user:{ln: "Washington" },grades:[{gr:[1,2,3]}]}); db.t.save({user:{fn: "Hello" ,ln: "World" }}); db.t.save({age:25, type: "offline" }); db.t.save({age:26, type: "online" }); db.t.save({age:27}); db.t.save({age:28, type: "single" }); db.t.save({age:40, type: "married" }); var qs = [{type:{$gt:4}}] var i = 0; for (i = 0; i < qs.length; i++) { print( "\nQuery: " +JSON.stringify(qs[i])); db.t.find(qs[i], {_id:0}); } ============================================== When executing this script I get the following result: C:\Downloads\mongodb\bin>mongo -quiet test < test.js Fri Mar 28 10:53:22.512 SyntaxError: Unexpected end of input Fri Mar 28 10:53:22.514 ReferenceError: i is not defined If I change the for loop like this: var i = 0; for (i = 0; i < qs.length; i++) I get: C:\Downloads\mongodb\bin>mongo -quiet test < test.js Fri Mar 28 10:54:53.021 SyntaxError: Unexpected end of input Query: {"type":{"$gt":4}} { "user" : { "fn" : "Chuck", "ln" : "Norris" }, "grades" : [ "F", "F", 3.5, 4, { "gr" : [ 1, 2, 3 ] } ], "type" : 6.3 } So with this modification I get a valid result, but still see some strange SyntaxError. C:\Downloads\mongodb\bin>mongo -version MongoDB shell version: 2.4.9