HTTP 500.0 error when opening K2Designer or Runtime after the upgrade from 4.6.6 to 4.6.11

  • 16 February 2021
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MillaZ
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HTTP 500.0 error when opening SmartForms sites after the upgrade from 4.6.6 to 4.6.11

kbt138154

PRODUCT
K2 blackpearl 4.6.11
K2 smartforms 4.6.11
TAGS
IIS
Installation
Upgrading
This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice. This article is not considered official documentation for K2 software and is provided "as is" with no warranties.
LEGACY/ARCHIVED CONTENT
This article has been archived, and/or refers to legacy products, components or features. The content in this article is offered "as is" and will no longer be updated. Archived content is provided for reference purposes only. This content does not infer that the product, component or feature is supported, or that the product, component or feature will continue to function as described herein.

Issue

Implementing the Application Initialization for IIS 7.5 (Server 2008R2) in 4.6.6, can cause the SmartForms sites (Designer and Runtime) to break after the upgrade to 4.6.11. 

 

An "Unable to bring up Designer or Runtime, HTTP 500 error" error appears.

 

Server Error in Application "K2/Designer"

'HTTP Error 500.0 - Server Error

The page cannot be displayed because an internal server error has occurred'

Symptoms

The "AppWarmupModule" was registered in Modules in IIS. When attempting to load SmartForms sites after the upgrade, IIS first will load this module.

 

Since the module has not yet configured, it stops K2 Designer/Runtime site to load correctly, see IIS forum link for more details:

https://forums.iis.net/t/1201292.aspx?AppWarmupModule+error+in+IIS

 

Resolution

Go to "K2 sites" in IIS and delete the module: i.e. AppWarmupModule from IIS > SmartForms Site > modules > and delete AppWarmModule.

 

The SmartForms sites will render correctly.

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