Please check management-server.log file for finding the details of any error messages thrown on the UI .
For api logs you can check api.log file for verifying the API call which was triggered and what parameters were sent and if the jobID was received. Regards, Pranav -----Original Message----- From: 朱兴雄 [mailto:zhuxingxi...@centrin.com.cn] Sent: Tuesday, December 25, 2012 11:29 AM To: cloudstack-users@incubator.apache.org Subject: Is there any error log file? Hi, Is there any error log file for cloudstack’s error message and detail cause? For example, when I start an VM, It pop up ‘Fail to start up system VM’. Is there any detail error log file used to analyze the root cause。 B.R. Xingxiong Zhu