Get-AzFunctionAppFlexConsumptionRuntime fails for DotNet-Isolated in any region

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#29,647 opened on May 20, 2026 0 comments 0 reactions 0 assignees View on GitHub

bug customer-reported

Dominant language: C#
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Merged PRs (30d): 54

Description

### Description

just errors whilst retrieving DotNet-Isolated.
I've tried multiple regions and nothing is returned.
Failed to retrieve Flex Consumption Function App stack definitions from the ARM API for runtime 'DotNet-Isolated' in
location 'East Asia'. Please try a different region.
At C:\Program Files\WindowsPowerShell\Modules\Az.Functions\4.3.1\Functions.Autorest\custom\HelperFunctions.ps1:911

### Issue script & Debug output

```PowerShell
Get-AzFunctionAppFlexConsumptionRuntime -Location 'eastus'
Failed to retrieve Flex Consumption Function App stack definitions from the ARM API for runtime 'DotNet-Isolated' in
location 'eastus'. Please try a different region.
At C:\Program Files\WindowsPowerShell\Modules\Az.Functions\4.3.1\Functions.Autorest\custom\HelperFunctions.ps1:911
char:5
+ throw $errorRecord
+ ~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], InvalidOperationException
+ FullyQualifiedErrorId : FlexConsumptionStackRetrievalFailed
```

### Environment data

```PowerShell
$PSVersionTable

Name Value
---- -----
PSVersion 5.1.26100.8115
PSEdition Desktop
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 10.0.26100.8115
CLRVersion 4.0.30319.42000
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
```

### Module versions

```PowerShell
Get-Module Az*

ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Script 5.3.3 Az.Accounts {Add-AzEnvironment, Clear-AzConfig, Clear-AzContext, Clear...
Script 4.3.1 Az.Functions {Get-AzFunctionApp, Get-AzFunctionAppAvailableLocation, Ge...
```

### Error output

```PowerShell
Resolve-AzError

HistoryId: -1

Message : Failed to retrieve Flex Consumption Function App stack definitions from the ARM API for runtime
'DotNet-Isolated' in location 'eastus'. Please try a different region.
StackTrace :
Exception : System.InvalidOperationException
InvocationInfo : {}
Line : throw $errorRecord

Position : At C:\Program
Files\WindowsPowerShell\Modules\Az.Functions\4.3.1\Functions.Autorest\custom\HelperFunctions.ps1:911
char:5
+ throw $errorRecord
+ ~~~~~~~~~~~~~~~~~~
HistoryId : -1

HistoryId: 1

Message : Operation cancelled due to security concerns. Use -UseBasicParsing parameter for safe HTML parsing
without script execution.
StackTrace : at System.Management.Automation.MshCommandRuntime.ThrowTerminatingError(ErrorRecord errorRecord)
Exception : System.InvalidOperationException
InvocationInfo : {Invoke-WebRequest}
Line : $result = Invoke-WebRequest -Uri $apiEndPoint -Method Get -Headers $headers
-ErrorAction Stop

Position : At C:\Program
Files\WindowsPowerShell\Modules\Az.Functions\4.3.1\Functions.Autorest\custom\HelperFunctions.ps1:1895
char:27
+ ... $result = Invoke-WebRequest -Uri $apiEndPoint -Method Get -Headers ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HistoryId : 1

Position : At C:\Program
Files\WindowsPowerShell\Modules\Az.Functions\4.3.1\Functions.Autorest\custom\HelperFunctions.ps1:1899
char:27
+ ... $result = Invoke-WebRequest -Uri $apiEndPoint -Method Get -Headers ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HistoryId : 1

Message : Cannot find a variable with the name 'DefaultFunctionsVersion'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Position : At C:\Program
Files\WindowsPowerShell\Modules\Az.Functions\4.3.1\Functions.Autorest\custom\HelperFunctions.ps1:48
char:15
+ ... if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue) ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HistoryId : 1

Message : Cannot find a variable with the name 'RequiredStorageEndpoints'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'ReservedFunctionAppSettingNames'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'DefaultCentauriImage'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'RuntimeToDefaultOSType'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'AllowedStorageTypes'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'SetDefaultValueParameterWarningMessage'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'DEBUG_PREFIX'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'RuntimeToFormattedName'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Message : Cannot find a variable with the name 'FlexConsumptionSupportedRuntimes'.
StackTrace :
Exception : System.Management.Automation.ItemNotFoundException
InvocationInfo : {Get-Variable}
Line : if (-not (Get-Variable $variableName -ErrorAction SilentlyContinue))

Contributor guide

Open the contributing guide

Research direction

Start by reproducing Get-AzFunctionAppFlexConsumptionRuntime -Location 'eastus' and inspect Functions.Autorest/custom/HelperFunctions.ps1 at lines 911, 1895, and 1899. Trace the ARM API retrieval and Invoke-WebRequest errors for DotNet-Isolated; done means the command retrieves the runtime without the reported failure across the affected regions.

Written by the indexing model from the issue text.

Assessment

Tech stack: azure, powershell
Domain: api, cloud
Issue type: Bug
Difficulty: 3/5
Estimated time: 1-2 days
Activity status: Quiet
Clarity: Mostly clear
Newbie friendliness: 52/100

Get-AzFunctionAppFlexConsumptionRuntime fails for DotNet-Isolated in any region

Description

Contributor guide

Research direction

Assessment

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