If it is reproducible and you do not know the exact time, reproduce it again and record the time so that you can easily point out the error from logs.
ContentManager-logs.zip file includes a week's worth of Content Manager logs, Tomcat logs, Server Support logs, Transmission Server logs , various CM config files.
Content Manager Logs (Send a ContentManager-logs.zip file to a support team)
System> Server Settings> Download Logs (Super administrator account not admin account)
Content Manager version 11.03 logs.
In case you can not get logs from Content Manager, get logs from your server.
Content Manager logs, Transmission server logs, Server support logs
ContentManager.log (Mainly, you need to check ContentManger.log to identify the issue.)
Point out the error
Search it on the net.
Check errors
For example.
06-07-2016 11:29:12,284 ERROR UNCHandler: Unable to retrieve list of files from \\gad4dxxxxxx01\flag jcifs.smb.SmbAuthException: The referenced account is currently locked out and may not be logged on to. at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:596)
ServerSupport IC.Log (Thumbnail or duration)
Check errors
For example. You need convert it to different formats.
ERROR Problem 39, Error 108.1: A thumbnail was not generated.|Error 108.1: (snapload) File C:\ProgramData\Scala\InfoChannel Content Manager 5\Data\cm\content\sample[52121721700].tif is unsupported or possibly corrupt.| (2016070700000039)