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UnauthorizedAccessException in powershell using Clear-Content

Posted on 2013-12-19
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Last Modified: 2013-12-21
I have a log file that I want to clear each day as part of running a script.  However I get an UnauthorizedAccessException even though the script is running as Administrator and Security on it is Full Control for Everyone

I'm stumped, what do I need to do?
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Question by:c7c4c7
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LVL 69

Expert Comment

by:Qlemo
ID: 39729615
It might be in access by AntiVirus software, or another process. Did you check that yet?
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Author Comment

by:c7c4c7
ID: 39729650
Anti Virus is not the problem, I tried that.   Another process - only process that access it is the one that creates it and I disabled that to see if it was causing the problem, no change in outcome.
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LVL 69

Expert Comment

by:Qlemo
ID: 39729678
Is the file local or on a share?
Are you able to delete/change/rename the file manually?
If loacal, check with Process Explorer or handle.exe (both www.sysinternals.com) whether the file is not open anymore. handle.exe might be easier for that purpose, as you just have to provide a part of the filename to get all open handles for that file.
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Author Comment

by:c7c4c7
ID: 39729713
Is the file local or on a share? - Local
Are you able to delete/change/rename the file manually? - Yes
If loacal, check with Process Explorer or handle.exe - No matching handles found.
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LVL 69

Expert Comment

by:Qlemo
ID: 39729731
Are you able to issue the Clear-Content manually?
If so, the script's autorization has to be the issue.
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Author Comment

by:c7c4c7
ID: 39729750
Are you able to issue the Clear-Content manually? - Nope same result
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LVL 69

Expert Comment

by:Qlemo
ID: 39729810
Then the following shouldn't work either:
"" > C:\logfile
Clear-Content c:\logfile -force

Open in new window

with the proper path and filename, of course.
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Author Comment

by:c7c4c7
ID: 39729843
What does this do

"" > C:\logfile
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LVL 69

Expert Comment

by:Qlemo
ID: 39729850
Overwrite your log file with an empty string - (almost) the same as Clear-Content should do.
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Author Comment

by:c7c4c7
ID: 39729892
Access to Path is denied
UnauthorizedAccessException
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LVL 69

Accepted Solution

by:
Qlemo earned 500 total points
ID: 39729923
Strange. Rename or delete the logfile, and then try each of both commands again, deleting the log file between the test.
We try to find out whether it is file create or overwrite issue.
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LVL 69

Expert Comment

by:Qlemo
ID: 39733583
Thanks for the points, but I can't see a solution here?
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Author Comment

by:c7c4c7
ID: 39733875
Don't know what it was.  Deleted file, let it get recreated and bingo it worked.

No restart in between, no changes to security .. it just started working
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