I have an air gapped system (SEC 5.2.1R2) that has been running fine, taking updates until I did some updates this week. the SUM errors when importing the updates in the console, giving "Software delivery failed".
Examination of the logs with logviewer.exe gives - Synchronize operation failed when synchronizing product release "Windows Endpoint Security and Control". Details: Cannot create stream 954058bb4a1ab320442a8500e5196ec6x000.xml
I have used KB article 119590 (Sophos Update Manager fails to import updates error 'Cannot create stream' and 'Error during package synchronisation'), I am sure it is not firewall related (nothing has changed and I have reporduced the error on a virtual test setup I had prior to the initial install with no firewalls), and it points to KB111843 to try and download the files mentioned.
I can not find any .xml files to download, and to be frank I am now totally confused, particularly because if I use the warehouse files from the previous week (still had the folder on a usb stick), the error goes and the files are imported correctly, just not the most recent ones!
HELP!!
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