Video VAST Errors


Error codes are a feature supported in IAB VAST 3.0 video standards and all subsequent versions. It provides feedback to the sender of the video bid, sent as a VAST XML, in order to understand why the video player was not able to serve the creative.



VAST 1.0 & 2.0

These protocols will return a simple error message if no ad is found to serve or if there is a technical issue in parsing the VAST XML response from Improve Digital.

VAST 3.0 onwards

The VAST 3.0 protocol supports detailed error reporting, returning specific error codes based on the event, to assist troubleshooting. You can read more about the IAB VAST 3.0 protocol here.

VAST Error Codes

Error Description
100 XML parsing error.
101 VAST schema validation error.
102 VAST version of response not supported.
200 Trafficking error. Video player received an ad type that it was not expecting and/or cannot display.
201 Video player expecting different linearity.
202 Video player expecting different duration.
203 Video player expecting different size.
300 General Wrapper error.
301 Timeout of VAST URI provided in Wrapper element, or of VAST URI provided in a subsequent Wrapper element. Includes request errors such as invalid URI, unreachable or request timeout for URI, and security or other exceptions related to requesting a VAST URI.
302 Wrapper limit reached, as defined by the video player. Too many Wrapper responses have been received with no InLine response.
303 No ads VAST response after one or more Wrappers. Also includes number of empty VAST responses from fallback.
400 General linear error. Video player is unable to display the linear ad.
401 File not found. Unable to find Linear/MediaFile from URI.
402 Timeout of MediaFile URI.
403 Could not find MediaFile that is supported by this video player, based on the attributes of the MediaFile element.
405 Problem displaying MediaFile.
500 General NonLinearAds error.
501 Unable to display NonLinear Ad because creative dimensions do not align with creative display area (i.e., creative dimension too large).
502 Unable to fetch NonLinearAds/NonLinear resource.
503 Could not find NonLinearresource with supported type.
600 General CompanionAds error.
601 Unable to display companion because creative dimensions do not fit within Companion display area (i.e., no available space).
602 Unable to display Required Companion.
603 Unable to fetch CompanionAds/Companion resource.
604 Could not find Companion resource with supported type.
900 Undefined error.
901 General VPAID error. Usually indicates that VPAID is not supported by the player.