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Safe control problem adter updating the WSP

Posted on 2012-03-27
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Last Modified: 2012-04-12
I created an visual webpart. Works well, but when I tried to update (Update-SPSolution...) my solution, web part does not work any more. It shows error:

	
Error [1] Web Part Menu
	 
Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type XXX, XXX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=XXX could not be found or it is not registered as safe.

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Seems like even visual studio refuses to deploy this application (something like: feature XXX is allready intalled. Use force attribute to ...) Even the rectract does not help.

What's going on? How do I fix this problem? I need to be able to update this solution.
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Question by:tolppa
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svetaye earned 2000 total points
ID: 37770629
Hello,
Is there any chance that you changed something in your web part settings? Something like namespace or class name?
In any case you need to check a couple of thing to figure it out:
1. Check the web.config of the web application that your solution has been deployed to. Do you see there a SafeControl tag with your solution assembly details? If not here is our issue.
2. You need to check an .spdata file of the web part to verify the Safe Control details:
http://www.21apps.com/sharepoint/namespace-not-token-spis/
3. You need to retract and delete your solution from Central Administration (if it's not a sandbox solution) and then try to package and deploy it again.

Please check this article also:
http://spointblog.sharepoint.com/Pages/Post.aspx?ItemID=24

I hope it helps.
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