compile error, AddOnBase missing!

[AndBro]

Hello,
I suddenlyI get compile errors at many of my addons (I have not touched them for a long time, and they have been compiled without any problems). To test the problem I created a new addon by use of the wizard, and that one do not compile. The compiler cannot find AddOnBase.

This is the auto-generated addon that do not compile:

namespace NinjaTrader.NinjaScript.AddOns
{
public class MyCustomAddOn : NinjaTrader.NinjaScript.AddOnBase
{
protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"Enter the description for your new custom Add on here.";
Name = "MyCustomAddOn";
}
else if (State == State.Configure)
{
}
}
}
}

I guess this is a simple error, but anyway I cannot find the solution.

Regards, Andbro

[NinjaTrader_ChelseaB]

Hi Andbro,

I would recommend running the repair from the installer in case any system files were accidently deleted.

http://ninjatrader.com/PlatformDirect

If you still get compile errors, please include a screenshot of the error messages with the Error column fully expanded so that we may read the full error message.

[AndBro]

Hello ChelseaB, thank you for your reply. This problem was probably bigger than I expected. I did your advice, and started with a repair but that did not help. I had to reinstall NT, and now it is working. I have no idea how the file could disappear … anyway NT is working now.

Have a nice day. /AndBro