CodexBloom - Programming Q&A Platform

How to handle unexpected 'Subscript out of range' scenarios when accessing a multi-dimensional array in VBA?

👀 Views: 79 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-11
vba arrays error-handling VBA

I'm writing unit tests and I'm working with a multi-dimensional array in VBA and working with a 'Subscript out of range' behavior when I try to access elements that I believe exist. The array is initialized dynamically based on the size of a data range in my Excel sheet. Here's my code snippet: ```vba Dim dataArray() As Variant Dim lastRow As Long lastRow = Sheets("Data").Cells(Sheets("Data").Rows.Count, 1).End(xlUp).Row ReDim dataArray(1 To lastRow, 1 To 2) For i = 1 To lastRow dataArray(i, 1) = Sheets("Data").Cells(i, 1).Value dataArray(i, 2) = Sheets("Data").Cells(i, 2).Value Next i ' Trying to access the last element Debug.Print dataArray(lastRow, 1) ' This line throws an behavior ``` I've confirmed that `lastRow` is calculated correctly and is greater than 0. However, when I try to access the last element of the first column, I get the behavior. I've also checked for any off-by-one errors in my array declaration. Can anyone explain why this might be happening? I've tried using `UBound(dataArray, 1)` to validate the upper bound, and it returns the expected value as well. What could be going wrong here? Any advice would be much appreciated. My team is using Vba for this REST API.