Hi Rosdyana,

That error indicates that the token used to retrieve a page of results from a 
search request has expired.

Specifically - when you make a search request in Python an iterator is returned 
that, under the hood, makes multiple requests to the API as you iterate over 
it. Each request retrieves a "page" of results, the size of which is defined by 
the page_size parameter seen here.

If you submit a request that generates 10,000 rows and the page_size is set to 
1,000 then the iterator will end up making 10 requests, each for 1,000 rows at 
a time.

The first response for rows 1 - 1,000 will include a page token that gets 
passed back to the API so it knows to retrieve rows 1,001 - 2,000, (this is all 
handled implicitly by the iterator).

Those page tokens have a life span of two hours. So this error likely occurred 
because two hours went by between page requests. For example if you submitted a 
request for a report with a page_size of 10,000 with a process that spent 
roughly 84 seconds processing each row the page token could expire by the time 
the next page was requested.

Do you see this error often, or did it just appear one time?

Best,
Ben Karl, Google Ads API Team
ref:_00D1U1174p._5001UHE49L:ref

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