Hi Dave,

I've just installed Nexu and started the initial build of relations. It doesn't get far before throwing an error which is written to the log as below:

 2017-10-24 16:00:32,219 [P10652/D4/TNexuRebuildJob] ERROR Umbraco.Core.UmbracoApplicationBase - Unhandled exception in AppDomain (terminating)
 System.ArgumentException: An item with the same key has already been added.
    at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
    at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
    at Our.Umbraco.Nexu.Core.NexuService.<>c__DisplayClass9_0.<GetLinkedEntitesForContent>b__0(PropertyWithParser pp) in C:\Users\twatts\Downloads\umbraco-nexu-develop\umbraco-nexu-develop\Source\Our.Umbraco.Nexu.Core\NexuService.cs:line 130
    at System.Collections.Generic.List`1.ForEach(Action`1 action)
 ...

I've downloaded the source code and debugged the issue. The problem is caused because you are using the name of the property type as the dictionary key. The name does not need to be unique (unlike the alias obviously).

If I change the properties on the document type so that the names are unique then the relation rebuild seems to work fine.

Regards,

Tim