Hi!
The normal behavior of the SoapUI Runner is to share datasources across all virtual users. This means that the first virtual user would use the first row in the data source and the second virtual user would use the second row and so on. Because of this, the normal use case of datasources does not require the loops.
In some cases you still need the data source to loop for each virtual user. Then you need to uncheck the "Make all datasources shared" radio button in the SoapUI Runner settings in Menu -> Settings.
Does that help you?
Regards,
Max
