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Error "The expression prefix 'NWLResources' was not recognized" in event logs

  • March 26, 2021
  • 0 replies
  • 647 views
butlerj
Nintex Employee
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ISSUE
The following error is appearing in the event logs of one or more servers in the Farm:

Load control template file /_controltemplates/15/NWLOnlineComponents.ascx failed: The expression prefix 'NWLResources' was not recognized. Please correct the prefix or register the prefix in the <expressionBuilders> section of configuration.
ERROR CODE
RESOLUTION
  1. Locate and back up the web.config file.
  2. Update the web.config file by adding the following text to the section:
<add expressionPrefix="NWLResources" type="Nintex.Workflow.Live.Localization.NWLResourceExpressionBuilder, Nintex.Workflow.Live, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bd539bd4aa1e2820" />
ADDITIONAL INFORMATION
This is an incidental error that is caused by a missing Live resource. If Nintex Live is not in use then this error can be safely ignored, however if there is a need to remove this error from the logs it can be resolved by either activating the Live features or adding the relevant line into the web.config of the server or servers showing the error.
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