One of the most common ways to implement PowerShell error handling is to set the ErrorActionPreference variable (or ErrorAction parameter) to Stop, and capture these errors with a surrounding try/catch block.

This works perfectly fine in many situations. However one problematic use is when a cmdlet needs to write multiple unique errors to the error stream. One specific example is New-AzResourceGroupDeployment, which can write multiple validation or deployment errors if they are encountered.

If you use the standard try/catch approach here then the cmdlet stops after writing the first error (by design– because you set the action preference). This post provides some tips to handle this scenario to ensure you don’t miss the additional error stream records.

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