Resolving EXPRESSION FAILED: DECLARATION EXPECTED Error in Qlik Sense with Mail & Deploy

Resolving EXPRESSION FAILED: DECLARATION EXPECTED Error in Qlik Sense with Mail & Deploy

You may encounter the following error when working with expressions in Qlik Sense, especially when using Mail & Deploy:
QuoteEXPRESSION FAILED: DECLARATION EXPECTED

This error typically occurs when there are no apparent syntax errors in the expression itself, but the problem is due to an issue within the code in the Qlik Sense modules.

Solution:
To resolve this issue, follow these steps:

1. Verify the Expression Syntax:
  • Double-check the syntax of the expression to ensure there are no mistakes.
  • Ensure that the expression is written correctly in the context of your Qlik Sense application.
2. Check the Qlik Sense Modules:
  • In Qlik Sense, navigate to Tools > Modules.
  • Review all custom module code and check if there are any modules with syntax errors or missing declarations. The error may be originating from code within these modules rather than the expression itself.
3. Correct Syntax Errors in Modules:
  • If you find any syntax errors within the code of the modules, correct them.
  • Common issues include missing variable declarations, misnamed functions, or incorrect references.
  • After correcting any errors, save the module code.
4. Clear Cache and Reload the App:
  • Once the issues in the modules are resolved, clear the cache in Qlik Sense and reload the application.
  • This will ensure that the updated code is applied and the expression is evaluated correctly.
5. Test the Expression:
  • After clearing the cache and reloading the application, test the expression again to check if the issue is resolved.
  • If the error persists, double-check the module code or consult any recent changes to the application.
6. Additional Troubleshooting:
  • If the issue continues to appear even after correcting the modules, review the entire Qlik Sense app for any other related errors.
  • You can also try creating a new expression in a different context to test whether the issue is specific to that expression or to the app as a whole.
Note:
  • Always ensure that custom modules have correct syntax and are properly referenced in the expressions.
  • If the error is still unresolved, consider consulting the Qlik Sense community or contacting support for more assistance.
Additional Resources:
  • Qlik Sense documentation on working with modules and expressions.
  • Mail & Deploy troubleshooting resources and support.
By following these steps, you should be able to resolve the EXPRESSION FAILED: DECLARATION EXPECTED error in Qlik Sense when using Mail & Deploy.


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