When Duco identifies an error in a submission or a statement, a warning message will display. This message provides both the number of the bad submission/statement, as well as the exact number of errors.
To drill down into the errors, select the relevant tab, then select the ID.
This will then return a detailed explanation of the error, allowing you to easily identify the issue.
Checking the Statements with errors box acts as a filter, allowing you to just focus on statements with errors..
Statement errors will show highlighted in red.