Shane Bartholomeusz

Geek and lover of all things tech related

Tag: dotnet

Solved: ‘Unable to find package’ error


Whilst recently installing Specflow on a new Windows PC, I ran into an unexpected error after running the below command:

dotnet tool install --global SpecFlow.Plus.License --version 3.9.7

This is the error I encountered whilst running the above command:

C:\Users\XXXX\AppData\Local\Temp\cd1e38b3-c92a-436d-b439-f1535d848adc\restore.csproj : error NU1101: Unable to find package No packages exist with this id in source(s): C:\Program Files\dotnet\library-packs, Microsoft Visual Studio Offline Packages The tool package could not be restored.
Tool ‘’ failed to install. This failure may have been caused by:
You are attempting to install a preview release and did not use the –version option to specify the version.
A package by this name was found, but it was not a .NET tool.
The required NuGet feed cannot be accessed, perhaps because of an Internet connection problem.
You mistyped the name of the tool.
For more reasons, including package naming enforcement, visit

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Solved: Dotnet EF CLI ‘Could not execute’ Error

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The ‘dotnet ef’ CLI command enables developers to work with Entity Framework Core (EF Core) database operations from the standard dotnet command line.

Recently I came across the below error whilst trying to run the ‘dotnet ef’ CLI commands:

$ dotnet ef
Could not execute because the specified command or file was not found.
Possible reasons for this include:
  * You misspelled a built-in dotnet command.
  * You intended to execute a .NET program, but dotnet-ef does not exist.
  * You intended to run a global tool, but a dotnet-prefixed executable with this name could not be found on the PATH.

If you have also encountered this error whilst using the Entity Framework commands via the dotnet CLI, then you’re in luck because I’ll be sharing the fix in this article.

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Solved: Cognitive Services – Operation returned an invalid status code ‘Unauthorized’


The Azure Cognitive Services SDK is a set of pre-built services that enable developers to easily and quickly integrate AI capabilities into their applications. It provides a wide range of cognitive services including computer vision, language understanding, speech, and search APIs.

Recently whilst using the Azure Cognitive Services SDK recently, I encountered the below error while trying to consume the Cognitive Services Computer Vision API using the Dotnet SDK.

If you’ve also encountered the same error then you are in luck, because in this post I’ll share the solution that worked for me.

Operation returned an invalid status code ‘Unauthorized’

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