Article - CS327618
[Knowledge Hub] Troubleshooting the error "This variable is undefined. Check that the label is set correctly" in Mathcad Prime
Modified: 10-Mar-2026
Applies To
- Mathcad Prime 1.0 to 12.0
Description
- Troubleshooting the error: This variable is undefined. Check that the label is set correctly.
- What is the meaning of error: This variable is undefined. Check that the label is set correctly.
- What is the meaning of error (German): Diese Variable ist nicht definiert, Prüfen Sie, ob die Beschriftung richtig festgelegt ist.
- regarding a specific math label type
- when evaluating an output from programming
- when Symbolic Results are not assigned
- f(x):=x*x=?[error message] when variable is used in a function definition
- when opening a worksheet
- when opening a mcdx file converted from Mathcad 15.0 format
-
retrieving the MCDX file for the first time immediately after converting it from Mathcad 15.0 format to Mathcad Prime
- when Integral symbolic resolution does not seem to check unit consistency
- while trying to use specific built-in functions such as Find, Minerr
- A previously working project has stopped to function properly
- Question mark error:
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