Endpoints and Parameter Sets

PowerShell Universal
1 
Product: PowerShell Universal
Version: 3.8.12

I’ve run into a potential bug when trying to use Invoke-PSUScript within an Endpoint when calling a script that uses parameter sets. Having a single parameter set per parameter does not give any errors, example:

PARAM(
    [Parameter(Mandatory, ParameterSetName = "Set1")]
    [string]$Test1
)

But when I add an additional parameter set to the same parameter, like this:

PARAM(
    [Parameter(Mandatory, ParameterSetName = "Set1")]
    [Parameter(Mandatory, ParameterSetName = "Set2")]
    [string]$Test1
)

I receive an error in the Endpoint stating: Cannot retrieve the dynamic parameters for the cmdlet. An item with the same key has already been added. Key: Test1

My assumption is that when generating the dynamic parameters, it tries to add the same parameter name for each parameter set it has assigned. Is there a workaround for this other than refactoring the underlying script to not use parameter sets?

2

Following…

3

This is a bug. The only work around would be to have a single parameter set with different parameter names or to have separate scripts.

I opened an issue here: Invoke-PSUScript does not work with parameter sets · Issue #2436 · ironmansoftware/issues · GitHub