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Unknown tag prefix 'telerik' / green squigglies

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David
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David asked on 29 Aug 2008, 05:08 PM
Haven't had to deal with this issue, for quite some time, telerik or otherwise... but, it's rearing it's ugly head and I cannot figure out why--

Prior to doing a clean Vista64 install... I'd been running for 18+ months from an XP/Vista upgrade.. through many versions of Telerik controls, countless web apps, both file and project based, pre and post Vista-SP1, VS2005, vs2008-SP1... and never ran into this with Telerik controls.

After the clean-install of Vista64, all the updates/SP1, (skipped vs2005 this time)  only installed vs2008, SP1.  I then did the full exe install of 2008.2.823.. and began to work on an existing file-based web app.

All was fine.. NO issues for a couple days.. and then, for reasons unknown, the issue appeared.

No previous version conflicts.  I'm not using nested masters.  I've tried the Telerik declarations in web.config and/or in solo pages and/or content pages... with/without the chart dll... removed/readded config handlers, removed/readded controls... etc.
  After trying many things.. I closed all down.. rebooted.. renamed the folder the web is in so VS would see it as a "different" website... re-opened as new.. I get the same deal.

Oddly, I can create a new web app, drag in Telerik controls, add handlers, and no squigglies... so I suppose it's my app.. or web.config... or, what.. what else in the app could cause?  I took the working app web.config and merged with the other.. and issue still exists.

Any suggestions on what else to try?  What else could be causing?  I'm totally stumped.

Thanks for any tips!
David




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Sebastian
Telerik team
answered on 01 Sep 2008, 07:59 AM
Hi David,

Is it possible that the issue comes from the fact that you run your web site in IIS 7 Integrated Mode and Windows Vista? Another reason would be that you have not granted the proper permissions through the system.web -> authorization section of your web.config file.

Review the relevant paragraphs of this topic from the RadControls for ASP.NET AJAX documentation concerning the possible solutions for the aforementioned cases.

Best regards,
Stephen
the Telerik team

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