implementing Excel VBA Looping Through Named Ranges and Performance Degradation
I'm stuck on something that should probably be simple... I tried several approaches but none seem to work. I'm trying to loop through multiple named ranges in my Excel workbook using VBA to perform data validation. However, I've noticed important performance degradation when the named ranges contain a large number of cells, specifically ranges with over 10,000 rows. The process takes much longer than expected, and in some cases, Excel becomes unresponsive during the execution. Here's the code I'm using: ```vba Sub ValidateData() Dim rng As Range Dim cell As Range Dim namedRangeNames As Variant namedRangeNames = Array("DataRange1", "DataRange2", "DataRange3") Application.ScreenUpdating = False Application.Calculation = xlCalculationManual For Each name In namedRangeNames Set rng = ThisWorkbook.Names(name).RefersToRange For Each cell In rng If IsEmpty(cell.Value) Then cell.Interior.Color = vbRed Else cell.Interior.Color = vbGreen End If Next cell Next name Application.ScreenUpdating = True Application.Calculation = xlCalculationAutomatic End Sub ``` I've tried turning off screen updating and setting calculation to manual to improve performance, but it still seems sluggish. Additionally, I'm working with an scenario where occasionally I get a runtime behavior stating `"Application-defined or object-defined behavior"` when attempting to set the range. This behavior occurs specifically when one of the named ranges is deleted or if the workbook has not been fully loaded. Is there a more efficient way to handle this type of operation, or how can I improve the performance? Any insights would be greatly appreciated! How would you solve this? Any ideas what could be causing this? Thanks for any help you can provide!