# Two couplings to one interface reloaded **URL:** \ **Category:** Using preCICE\ **Tags:** multi-coupling, coupling-schemes\ **Created:** [June 24, 2020, 7:03pm UTC](https://precice.discourse.group/t/two-couplings-to-one-interface-reloaded/260 "2020-06-24T19:03:22Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![ajaust](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/ajaust/32/160_2.png) [@ajaust](https://precice.discourse.group/u/ajaust)\ **Post date:** [June 25, 2020, 11:44am UTC](https://precice.discourse.group/t/two-couplings-to-one-interface-reloaded/260/3 "2020-06-25T11:44:57Z")
Thanks for the quick response! The action interface looks indeed interesting. I am not sure whether it is possible two have to source datasets. All the examples and also the `action:python` example has only one data set as input. The action `summation` sounds as it could be the right thing, but it is not clear what it sums up. It is mentioned in the [documentation](https://github.com/precice/precice/wiki/Actions-Configuration#basics-and-pre-implemented-actions) as pre-implemented action, but it does not appear in the [XML reference](https://github.com/precice/precice/wiki/XML-Reference). Is this a mistake or is it not part of preCICE anymore? Edit: Regarding summing up data from multiple input datasets. Could I have a chain of actions that write the source data into the target data after each other? Edit 2: I also realized that I run into the problem that I technically want to map from two meshes onto one which was not well defined according to the [uekerman’s post](https://precice.discourse.group/t/two-couplings-to-one-interface-mixed-dimensional-coupling/68/2). I am not sure If I can easily workaround this using actions. I gave it a quick try, but I failed so far. ☹ --- _[View the full topic](https://precice.discourse.group/t/two-couplings-to-one-interface-reloaded/260)._