您壓縮該資料庫的請求現在正在伺服器上執行
What happened
You chose File > Application > Properties, clicked the information tab, and clicked Compact for an application on a server.
What you can do
If you chose this command inadvertently, wait a few minutes until the compaction is completed and try again to open the application. Compaction merely removes unused storage space from an application; nothing about the application will change except its size.