Error: Cannot
add the specified assembly to the GAC in SharePoint 2010
We had a
solution deployed numerous times as it houses a line of business process in
SharePoint 2010. On performing Upgrade Solution via stsadm or Update-Solution via Power
Shell , encountered the error: cannot add the specified assembly to the GAC.
We started by
created a test solution package and deployed it on the environment which worked
fine to identify whether the issue was with the Package or environment.
On updating the LOB Solution , it couldn’t add
the assembly to the GAC for LOB WSP, on one of the WFE servers.
Performed an
IISRESET and restarted the timer service on the failing WFE, deployed the WSP package again, it did
work but when we tried updating it again at the later stage, got the same error.
I had to rely on
Process Explorer
to figure out what process was using the DLL and from where. The beauty of this
tool is, it displays the list of processes running on the server and what DLL’s
its using.
You can do a Find for the DLL file from the top menu
bar to identify the process which it’s using.
I figured out
using the Process Explorer, the Timer Service Process was referring to DLL from
c:\windows\assembly\temp
I cleared the
Temp folders which had the DLL, performed an IISRESET and restarted the Timer
Service
This resolved
the issue for me. You will have to identify what process is conflicting and
troubleshoot the same accordingly.
Thank you very much, we had a persisting issue that we couldn't resolve. Your help is indeed valued.
ReplyDeleteThank you for your post.
ReplyDeleteIt didn't help Us.
ReplyDeleteIISRESET + reset SPTIMERV4 + physical restart + SysInternals Handle to remove locking process, delete the file
Also, cannot put back old version in GAC
And also, GACUTIL says the file is arleady installed, after uninstall doesn't work either.
you rock - fixed my issue
ReplyDeleteVisual studio Restart + IISRESET
ReplyDelete