Input string was not in a correct format. 
Type: 
SourceCode.SmartObjects.Client.SmartObjectException
Source: 
SourceCode.SmartObjects.Client
Method Base 
Member Type: 
Method
Name: 
ExecuteScalar
Module 
Scope Name: 
SourceCode.SmartObjects.Client.dll
Declaring Type 
Full Name: 
SourceCode.SmartObjects.Client.SmartObjectClientServer
Stack Trace: 

at SourceCode.SmartObjects.Client.SmartObjectClientServer.ExecuteScalar(SmartObject smartObject, DataTable inputTable)

at SourceCode.Forms.AppFramework.FormRuntime.SmartObjectExecution(XPathNavigator nav, Boolean outputDependencies, SmartObjectClientServer svr)

at SourceCode.Forms.AppFramework.FormRuntime.WorkXmlToApi(String xml)

at SourceCode.Forms.Runtime.AJAXCall.ProcessRequest(HttpContext context)