Echo Warning

This command is used to display error messages in the workflow output log. The message can be text or a numerical expression which is evaluated. The reference to a variable in the message is substituted with the value of the corresponding variable. The message can include unicode characters.

The workflow execution continues with the next commands. However, the workflow execution completes with an error. This command provides an ability to report an error conditionally to the user. You can review the reported error messages in the workflow log.

Syntax
Echo Warning: <message>;
Log Message
The message argument, as a warning
This table lists the examples of the Echo command:
Requirement Syntax
If the “Unsatisfied Demand” query contain a result, display a warning message to the workflow log, and mark the workflow completion state as warning. 
Select Children: %Queries.Unsatisfied Demand;
IF $selection_size > 0 THEN
    Echo Warning: There are $selection_size customers with unsatisfied demand;
END IF;
If the value of the “$allow_lost_sales” variable is greater than 0, display a warning message to the workflow log, and mark the workflow completion state as warning. 
IF $allow_lost_sales > 0 THEN
    Echo Warning: Lost sales are allowed;
END IF;