Hi Marius, thank you for your response. However I am doubt that this the cause of the problem. I never modified the space or activity macro on rhierlmeier.myxwiki.org before it got lost. It must be a bug in XWiki. Futhermore in our internal wiki we have only global users. We imported the macros as global "Administrator". I found out that the macros disappear after each restart of xwiki. After adding a comment to the macros the become available again. I am willing to debug the problem. Can you please provide me a hint how to find the root cause of the problem. Richard -- View this message in context: http://xwiki.475771.n2.nabble.com/Unknown-Macros-after-upgrade-from-2-x-to-3... Sent from the XWiki- Users mailing list archive at Nabble.com.