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The Expression Contains Undefined MyUserFunction


Product Progress® Telerik® Reporting
Version Q2 2012 and later


A The expression contains undefined function call MyUserFunction() error message occurs.


The possible causes for the error message to occur are the following:

  • The function name is typed in manually in the expression, without building the class library, and it does not exist yet.
  • The function is used with an incorrect number or type of parameters. The passed fields must match the function signature.
  • The field specified in the function is null. Make sure such cases are handled in the user function.


Depending on each possible cause scenario, handle the issue respectively, as described above.

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