Access Control on sub report on form -

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i'm trying reference control on sub-report located on form. i've done before using subforms on form subreport version giving me error:

[forms]![formname]![subreportname].[form]![controlname]

it returns #error. when there data in control. ideas?

all of below throw exception:

[reports]![formname]![subreportname].[form]![controlname] [forms]![formname]![subreportname].[report]![controlname] [reports]![formname]![subreportname].[report]![controlname]

a subreport located in report, not in form. thus:

[reports]![reportname]![subreportname].report![controlname]

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