Links to docs I have viewed

https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KE…
https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KE…
https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KE…

Even though I use Cache I still looked at IRIS doc

https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cl…

This is the error I am getting

And this is the view details

This is the Visual Studio

And this is the Cache Version

Cache' Studio Client  2018.1.2 Build 309 Patch 5
Server Cache for Windows (x86-64) 2018.1.2 (Build 309_5)

AH!

I wonder what is wrong, I have had Cache on my home PC for literally ages, well over a year, from memory I downloaded from Intersystems and had zero trouble until trying to do what im trying now, studio works great, reflections terminal works great, management portal works great I can code ObjectScript and cls no problem.

Just wanted to say thank you, I think I'll give C# to cache a miss and stick with C# to MySQL or even .csv files as I'm only doing this as hobby at home so not really needed, thanks anyway :-)