Product(s):	AECOsim Building Designer
	Version(s):	V8i and CONNECT Edition
	Environment:	N/A
	Area:	Annotation
	Subarea:	DataGroup Annotation

Problem

When trying to annotate a diffuser an error pops up "ERROR!!! Unable to find active cell."  Even if DataGrooup Annotation Cell is attached the same issue happens.

Solution

This might be because there is no annotation cell defined for annotating the grilles. The following video shows how you can create one for a particular grille type: