# i have probmels with my paraview calculator that before i declare something i receive this error. in addition i use paraview 5.12 windows edition

**URL:** https://discourse.paraview.org/t/i-have-probmels-with-my-paraview-calculator-that-before-i-declare-something-i-receive-this-error-in-addition-i-use-paraview-5-12-windows-edition/14180
**Category:** ParaView Support
**Created:** [March 17, 2024, 2:15pm UTC](https://discourse.paraview.org/t/i-have-probmels-with-my-paraview-calculator-that-before-i-declare-something-i-receive-this-error-in-addition-i-use-paraview-5-12-windows-edition/14180 "2024-03-17T14:15:27Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Arshia\_Amiri](https://discourse.paraview.org/user_avatar/discourse.paraview.org/arshia_amiri/32/13956_2.png) [@Arshia\_Amiri](https://discourse.paraview.org/u/Arshia_Amiri)
#### Post date: [March 17, 2024, 2:15pm UTC](https://discourse.paraview.org/t/i-have-probmels-with-my-paraview-calculator-that-before-i-declare-something-i-receive-this-error-in-addition-i-use-paraview-5-12-windows-edition/14180/1 "2024-03-17T14:15:27Z")

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ERROR: In vtkExprTkFunctionParser.cxx, line 955  
vtkExprTkFunctionParser (000002A6D16E7640): Vector variable name is already registered as a scalar variable name

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [March 18, 2024, 8:46am UTC](https://discourse.paraview.org/t/i-have-probmels-with-my-paraview-calculator-that-before-i-declare-something-i-receive-this-error-in-addition-i-use-paraview-5-12-windows-edition/14180/2 "2024-03-18T08:46:43Z")

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Please use another name for the result name array.