My project is making Xojo read math ml code (which looks like xml) and output the corresponding equation.

I’m trying to do that by first identifying all the nodes of the math ml code and sending each node to a method (called SymAlph) that

will interpret the node names as symbols and store them into an array.

Here is some math ml code I want to read:

```
<math xmlns="http://www.w3.org/1998/Math/MathML">
<infinity/>
</math>
```

This code should just display the infinity symbol, ?.

I pass this math ml file as myFile to the method I’ve written below.

The following method should pass all the nodes of myFile to another method called SymAlph

that interprets the node names as symbols and stores them in an array.

The issue is I get the error OutOfBoundsException in the below code at the line “ElseIf stack(pointer) <> Nil Then”

Does anyone have a fix, or any suggestions or resources for me to whole issue of interpreting math ml as equations?

```
Dim root As XmlNode
Dim xmlDoc As New XmlDocument
Dim stack() As Variant //Needed to go through all the nodes of the math ml text
Dim pointer As Integer
pointer = 1
xmlDoc.LoadXml(myFile)
root = xmlDoc.DocumentElement
While 1 = 1 //this loop should go through all the nodes of any math ml file
If root <> Nil Then
If root.ChildCount <> 0 Then
stack().Append(root.FirstChild)
End
SymCheck(root) //store the symbols of the root
If root.NextSibling <> Nil Then
root = root.NextSibling
ElseIf stack(pointer) <> Nil Then
root = stack(pointer)
ElseIf stack(pointer) = Nil Then
Exit
End
ElseIf root = Nil Then
Exit
End
Wend
```