Mashup Design can't work

guys, has anyone ever experienced this phenomenon:

how can i fixed this?

10-Marble

when i changed the tomcat directory's owner and mode, it's ok now. thank you very much!

22-Sapphire I

Are you lacking design time permissions or suffer connection interruptions to the database?

Never seen this happen but that's what comes to mind as potential issues.

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10-Marble

when i changed the tomcat directory's owner and mode, it's ok now. thank you very much!

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