Subreport does not appear on Print Preview

[Joris]

I have made a report with subreports and one of the
subreports does not show on print. Any other subreport
will, but this one won't. The minute I change the record
source of the subreport to the particular table, the
subreport disappears (in print preview).
Any suggestions?

 

[SA]

Joris:

Sub reports fail to display when they don't return any records. In your
case this could occur if the Link Master / Link Child properties of the sub
report you have set cause no records be return for a specific record in the
main report (e.g. a Customer with no orders) or if there is a condition in
the subreport's query that is causing it to not return records.