Application Worksheet Function Error

[max57]

HI folks,

I’ve created a small user form to convert food measurements.
My problem is the code is bugging out at the Function I made to do the calculations

I receive :
“Runtime Error 1004”
Unable to get the Match Property of the Worksheet Function Class”

This is the function code.
You may want to explore the file to see if I ‘ve it set up incorrectly.

Function ConvertCalc1()
  If OptionButton2.Value = True Then
TextBox2.Value = TextBox1.Value * Application.WorksheetFunction.Index("VOLUMN_Table", Application.WorksheetFunction.Match(ComboBox1.Value, "VOLUMN_ROWS", 0), _
Application.WorksheetFunction.Match(ComboBox2.Value, "VOLUMN_COLUMNS", 0))
  Else
TextBox2.Value = TextBox1.Value * Application.WorksheetFunction.Index("WEIGHT_Table", Application.WorksheetFunction.Match(ComboBox1.Value, "WEIGHT_ROWS", 0), _
Application.WorksheetFunction.Match(ComboBox2.Value, "WEIGHT_COLUMNS", 0))

End If
End Function

I’ve included the workbook to more clearly illustrate the problem.

Thanks !

Mark