Error Handling

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Your ad display delegate or callback interface receives a call if an ad fails to load or fails to display. This call is accompanied by an error code. This page describes these error codes.

Error Object

The error that you receive in your callback is a first-class error object, AdError. This object has three properties:

Code: the error code, which you can find in the table below
Message: a human-readable message that describes the error
AdLoadFailureInfo: a description string that, when present, contains error codes and reasons why each mediated network failed to load an ad

MAX Error Codes

Code	Description	Load / Display
204	No ads are currently eligible for your device (no fill). MAX returned no eligible ads from any mediated networks for this app/device.	L
−1	The system is in an unexpected state. This error code represents an error that could not be categorized into one of the other defined errors. See the message field in the error object for more details.	L/D
−23	You are attempting to show a fullscreen ad (interstitial or rewarded) while another fullscreen ad is still showing.	D
−24	You are attempting to show a fullscreen ad before it has loaded.	D
−1000	The ad request failed due to a generic network error. See the message field in the error object for more details.	L
−1001	The ad request timed out due to a slow internet connection.	L
−1009	The ad request failed because the device is not connected to the internet.	L
−5001	The ad failed to load due to no networks being able to fill. MAX returned eligible ads from mediated networks, but all ads failed to load. See the `adLoadFailureInfo` field in the error object for more details.	L
−5201	The internal state of the SDK is invalid. There are various ways this can occur.	L
−5205	The adapter did not have an ad ready when attempting to display.	L
−5209	Unspecified internal error.	L
−5601	The SDK failed to load an ad because it could not find the top `Activity`.	L
−5602	The SDK failed to display an ad because the user has the “Don’t Keep Activities” developer setting enabled.	D
−5603	The SDK failed to load an ad because the publisher provided an invalid ad unit identifier. Possible reasons for an invalid ad unit identifier: ad unit identifier is malformed or does not exist ad unit is disabled ad unit is not associated with the current app’s package name ad unit was created within the last 30–60 minutes	L

Error Codes from Various Networks

To better understand the error codes that various ad networks return, see the error documentation pages published by those networks:

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