XML Parsing Challenges
Tackling VAST Error 100
VAST Error 100 occurs when the XML code of the VAST tag is incorrectly formatted, preventing the video player from processing the ad request1. This can result in ads not displaying or appearing in unintended ways, potentially eroding ad revenue and advertiser trust1.To resolve this issue, publishers should alert the buyer to verify and correct the VAST XML formatting. Using a VAST Validator tool can help identify and rectify XML code discrepancies.
Schema Validation Issues
Addressing VAST Error 101
VAST Error 101 arises when the buyer’s response is missing required XML elements or attributes, or contains unknown elements4. This error can disrupt the ad serving process and lead to failed ad displays.The solution involves the publisher notifying the buyer, who must then ensure that the VAST XML contains all necessary elements and attributes as specified in the IAB’s VAST guidelines.
Version Compatibility Problems
Resolving VAST Error 102
When a video player doesn’t support the VAST version specified in the bid request, VAST Error 102 occurs. This compatibility issue can prevent ads from being served correctly.To address this, publishers may need to update their video players to support newer VAST versions. Alternatively, buyers should ensure they’re responding with a VAST version compatible with the publisher’s player.
Wrapper-Related Complications
Overcoming VAST Errors 300-303
Wrapper errors (300-303) can occur due to various issues, including timeout problems, excessive wrapper limits, or empty VAST responses6. These errors can significantly impact ad delivery and campaign performance.Publishers can mitigate these issues by adjusting timeout settings, increasing wrapper limits, and implementing video fallback strategies. Buyers should ensure their VAST redirects are properly configured and avoid circular redirects.
Creative Display Difficulties
Fixing VAST Errors 400-408
Errors in the 400-408 range often relate to problems with the ad creative itself, such as incompatible media files or display issues6. These can prevent ads from playing or displaying correctly. To resolve these errors, publishers should check for video player compatibility issues and ensure proper configuration for autoplay detection. Buyers need to verify that their VAST responses include valid, compatible creative formats68.By understanding and addressing these common VAST errors, publishers and advertisers can significantly improve the efficiency of their video ad campaigns, ensuring smoother ad delivery and better viewer experiences.