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Hi,
from your attachment it would appear that you are working on a fat client.
If it is a fat client then it would appear that you either have problems with either someone else using JDE at the same time as you (Terminal Server sessions enabled) - check task manager to see if either ActiveConsole.exe or Oexplore.exe are running under another user id.
If you have either two of either of the above OR one each of the above running (either under your user id or separate user id's then this is the cause of your problem.
If you logout of JDE and still see either of these application still in task manager (and you do not know who or how they were started) then I would suggest that you either kill them (task manager) or reboot your fat client.
IF you are running on a dedicated Terminal Server then you have different issues - do not do as mentioned above.
More information along the lines of type of client machine, etc would be helpful.
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OK,Thanks. I reboot this fat client and this error disappears,but isn't there any way for this error?