URGENT: Upgrade to 4.2.1 > Error viewing contact details

[rcheesley]

It looks like you have not fully completed the upgrade.

See this thread which has the same error:

Error after upgrading to 4.2 clearing cache fails and error: Unknown column last_built_date in field list

Right - @tobsowo had a similar problem. Other than the usual ‘don’t update in the browser’ message, here’s what helped him: Clear the cache by deleting the cache folder Follow these steps: