Hi Rob,Could you please give us a bug report ID related to this crash?The definition of the HideStuff function would be helpful. Or the list of the API functions you call inside it.The minimum steps to reproduce this crash with a new plan also would ...

Hi Rob,Unfortunately, there is no way to get notified when this event occurs. As you mentioned, the only thing you can do is inserting a new format and react when the publishing of the inserted format is called.Best Regards,Ákos

Hi Linh,You have to change the bit of APILay_Hidden in the attr.header.flags attribute to get the desired result.If you always want to show or hide the layer then use the proper branch of the commented solution. GS::UniString attrName = *attr.header....