Incremental : unable to Fetch Lead data of Salesforce in java Script

[#1]

I want to get table of lead  from Salesforce .I have a sql and sql showing following error .

code is here:

Let vLastExecTime = timestamp(if(isnull(QvdCreateTime('$(vQVDPath)ReloadHistory.QVD')), 0, ConvertToLocalTime(QvdCreateTime('$(vQVDPath)ReloadHistory.QVD'), 'GMT', 1)), 'YYYY-MM-DD hh:mm:ss');

error is shown below: