Here’s a JScript snippet for deleting ICE trees from the objects in a group.

Note that the Primitive.ICETrees property returns all ICE trees that write to the object, including ICE trees on different objects (such as the italicized ICE tree in the screenshot below).

var o = Selection(0);
delICETrees(o, false );

function delICETrees( oGroup, bDelAll )
{

	var bFlag = ( bDelAll == null ) ? false : bDelAll;
	logmessage(bFlag);

	if ( oGroup != null && oGroup.type == "#Group" )
	{
		oGroupEnum = new Enumerator( oGroup.Members ) ;
		for (;!oGroupEnum.atEnd();oGroupEnum.moveNext() )
		{
			var o = oGroupEnum.item() ;
			var p = o.ActivePrimitive;

			oICETreeEnum = new Enumerator( p.ICETrees ) ;
			for (;!oICETreeEnum.atEnd();oICETreeEnum.moveNext() )
			{
				var oICETree = oICETreeEnum.item() ;
				if ( bFlag || oICETree.Parent3DObject.IsEqualTo( o ) )
				{
					LogMessage( oICETree.fullname );
					// DeleteObj( oICETree );
				}
			}
		}
	}
	else
	{
		LogMessage("Select a group" );
	}
}