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PowerShell 7.3 - guide with Exporting Large Data Set to Excel using ImportExcel Module

πŸ‘€ Views: 58 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-10
powershell excel export memory-usage importexcel

I'm updating my dependencies and I've searched everywhere and can't find a clear answer. I'm trying to export a large dataset to an Excel file using the `ImportExcel` module in PowerShell 7.3, but I keep running into a memory scenario when processing datasets larger than 50,000 rows. I'm using the following code snippet to perform the export: ```powershell $data = Get-Content -Path 'C:\path\to\largefile.csv' | ConvertFrom-Csv $excelFilePath = 'C:\path\to\output.xlsx' $data | Export-Excel -Path $excelFilePath -AutoSize ``` When I run this, I get the following behavior message: ``` Exception calling "Export-Excel" with "1" argument(s): "Out of memory." ``` I've tried breaking the dataset into smaller chunks using the `Select-Object -First` and `Select-Object -Skip` methods, but the performance is severely impacted, and I still encounter memory issues. Here’s an example of the code I used to split the data: ```powershell $chunkSize = 10000 $numberOfChunks = [math]::Ceiling($data.Count / $chunkSize) for ($i = 0; $i -lt $numberOfChunks; $i++) { $chunk = $data | Select-Object -Skip ($i * $chunkSize) -First $chunkSize $chunk | Export-Excel -Path $excelFilePath -Append -AutoSize } ``` This still results in the same out-of-memory behavior. I've also verified that my machine has enough RAM and that other applications are not using excessive resources while the script is running. Is there a better way to handle large datasets in PowerShell for exporting to Excel, or any specific configurations I can adjust in the `ImportExcel` module to alleviate this scenario? What am I doing wrong?