How can Base Ad group ID be zero in keyword performance report?

[markus...@s24.com]

Since around a week, we are experiencing "strange" behaviour of the keyword performance report:

Some of the keywords have a "Base Ad group ID" of 0, unlike the "Base Campaign ID" which is still set. These keywords are in finished tests. 

Is this expected behaviour?

[Sreelakshmi Sasidharan (AdWords API Team)]

Hi Markus, 

Could you please share the report definition and a copy of the report with these rows so that I can take a closer look? Please use Reply privately to author to respond only to me. 

Thanks,
Sreelakshmi, AdWords API Team

[markus...@s24.com]

Hi Sreelakshmi,

> The BaseAdGroupId will have the AdGroupId of the base AdGroup if it is trial and if it is a base AdGroup, 

> it will have the same value for the AdGroupId and the BaseAdGroupId. 

> In your report, there are three AdGroups which are having BaseAdGroupId as 0 and all of them are trial AdGroups. 

> I could see that all three of these AdGroups were created after the draft was created and one day prior to the experiment ending. 

> That said, these trial AdGroups are not created from a base AdGroup from the original campaign and hence they do not have a BaseAdGroupId. 

> They cannot show same value for BaseAdGroupId and AdGroupId since they are not BaseAdGroups but they are trials instead. 

thanks for the explanation. 

It would be nice, if this explanation makes it into the report docs of "Base Ad group ID".

One last question: Why is the id 0 instead of "--"? Are not set ids always 0 instead of "--" or just in this case?

Best,

Markus

[Sreelakshmi Sasidharan (AdWords API Team)]

Hi Markus, 

Thanks for your feedback. I will let the team know about your request. Regarding the BaseAdgroupId being '--' instead of '0', I believe it is just giving back the default value which is '0' when there isn't an AdGroupId to map to.