Error when doing Advanced Querying  #18

GET request
"http://localhost:3000/app/advance/books?qry=SELECT name , author&sort=name"
throws the following error

TypeError: Cannot read property 'trim' of undefined
at Object.module.exports.handleAdvanceQueryModelGet (C:\Users\Downloads\nodegrid-master\nodegrid-master\core\services\query_services.js:30:51)
at C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\core\end_points\query_end_points.js:19:23
at callbacks (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\lib\router\index.js:161:37)
at param (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\lib\router\index.js:135:11)
at param (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\lib\router\index.js:132:11)
at pass (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\lib\router\index.js:142:5)
at Router._dispatch (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\lib\router\index.js:170:5)
at Object.router (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\lib\router\index.js:33:10)
at next (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at next (C:\Users\Rohan\Downloads\nodegrid-master\nodegrid-master\node_modules\express\node_modules\connect\lib\proto.js:165:78)