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#announcements
Title
# announcements
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Paul Wyatt

08/26/2020, 11:16 PM
We're seeing an error in our scheduler post 0.8 -> 0.9 migration
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dagster.check.CheckError: Failure condition: Attempted to deserialize class "FileInDirectoryCodePointer" which is not in the serdes whitelist.
Any thoughts?
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daniel

08/27/2020, 12:29 AM
Hi Paul - I think you may need to clear and re-instantiate via "dagster schedule wipe && dagster schedule up" as part of the migration - note that this will wipe out your schedule logs. Sorry, that should probably be part of the migration instructions
sorry, that probably should be part of the migration instructions
p

Paul Wyatt

08/27/2020, 12:30 AM
👍 I'll give it a try
Update: that was the issue. thanks