# Single-spa ValueConverter not found

**URL:** <https://discourse.aurelia.io/t/single-spa-valueconverter-not-found/5036>\
**Category:** Uncategorized\
**Created:** [January 5, 2023, 10:17am UTC](https://discourse.aurelia.io/t/single-spa-valueconverter-not-found/5036 "2023-01-05T10:17:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Marcel-B](https://yyz1.discourse-cdn.com/flex027/user_avatar/discourse.aurelia.io/marcel-b/32/2146_2.png) [@Marcel-B](https://discourse.aurelia.io/u/Marcel-B)\
**Post date:** [January 5, 2023, 10:17am UTC](https://discourse.aurelia.io/t/single-spa-valueconverter-not-found/5036/1 "2023-01-05T10:17:57Z")

</div>

Hey .

I use single-spa with Aurelia and have problems with the ValueConverter there.  
The Aurelia applications are built as SystemJs modules and displayed via single-spa. Two applications are never displayed at the same time. So in the DOM only one Aurelia application is active. So far everything works.  
Application A uses a Value Converter, application B has none.  
If I switch from application A to application B and then back to application A, the value converters used in application A are searched in the code of application B. In the html, the binding is not resolved at the corresponding position and the variables are visible. The Error Message is `ncp-produktliste.js:2 Uncaught (in promise) Error: No ValueConverter named "currency" was found!` (produktliste.js = application B)  
If I include the same ValueConverter in application B, it has no effect, the same error happens.  
Does anyone have an idea what this could be?  
(What is also strange: click.delegate is triggered 2x at buttons, click.trigger only 1x).