MSCA/MWA custom field not able to generate LOV using SQL query - "Unsuccessful row construction"

Hi ,

I am new to MSCA/MWA development environment.My client has a requirement where he wants to generate LOV for a field using SQL query.I had added the code for this requirement but I am getting "Unsuccessful row construction" error message.Below is the code that I had added.

//declaring a variable for LOV

LOVFieldBean mAsnLabel;

//The variable is instantiated and set its properties

this.mAsnLabel = new LOVFieldBean();

this.mAsnLabel.setName("LoadTruckPage.ASNLabel");

this.mAsnLabel.addListener(this);

this.mAsnLabel.setPrompt("ASN Label");

addFieldBean(this.mAsnLabel);

//In FieldEntered Listener,a method is called to execute the query and generate LOV