When below code is executed in Qlik Script daily, Sometimes the script runs successfully and sometimes it throws below mentioned error and fails.
Qlik Script:
Load DateColumn as Count_Row_Date,
Count_Row_Num
select top 1
cast(LDateUTC as date format 'YYYYMMDD') as DateColumn,
sum(1) as Count_Row_Num
from FactTable
group by 1
order by 1 desc;
ERROR MESSAGE
Error: Field 'DateColumn' not found
I'd guess that something is causing the SQL to not return anything, possibly some sort of error that the connector doesn't catch. As a result, the load can't find the field from the Select. You could cross-check your database logs to see whether the query is executing successfully at the specified time.