diff --git a/corsika/detail/modules/epos/Interaction.inl b/corsika/detail/modules/epos/InteractionModel.inl
similarity index 98%
rename from corsika/detail/modules/epos/Interaction.inl
rename to corsika/detail/modules/epos/InteractionModel.inl
index 7346b18463c298a8ece2b0968b17e0e0b8dab511..98db3875c6fdeaf9346b0757fa1fbe87a5e16cd3 100644
--- a/corsika/detail/modules/epos/Interaction.inl
+++ b/corsika/detail/modules/epos/InteractionModel.inl
@@ -8,18 +8,12 @@
 
 #pragma once
 
-#include <corsika/modules/epos/Interaction.hpp>
+#include <corsika/modules/epos/InteractionModel.hpp>
 #include <corsika/modules/epos/EposStack.hpp>
 
-#include <corsika/media/Environment.hpp>
-#include <corsika/media/NuclearComposition.hpp>
-
 #include <corsika/framework/utility/COMBoost.hpp>
 #include <corsika/framework/utility/CorsikaData.hpp>
 
-#include <corsika/setup/SetupStack.hpp>
-#include <corsika/setup/SetupTrajectory.hpp>
-
 #include <epos.hpp>
 
 #include <string>
diff --git a/corsika/detail/modules/sibyll/NuclearInteractionModel.inl b/corsika/detail/modules/sibyll/NuclearInteractionModel.inl
index bda2996b5a1c2eacd9d2f9a5e81c2f85e3e91987..c2bfecd92a79c33c4a108460ba0fd4d3d710cf2b 100644
--- a/corsika/detail/modules/sibyll/NuclearInteractionModel.inl
+++ b/corsika/detail/modules/sibyll/NuclearInteractionModel.inl
@@ -57,10 +57,11 @@ namespace corsika::sibyll {
   inline void
   NuclearInteractionModel<TEnvironment, TNucleonModel>::printCrossSectionTable(
       Code const pCode) const {
-    if (pCode == Code::Argon) {
-      CORSIKA_LOG_WARN("SIBYLL cannot handle Argon as target!");
+    if (!hadronicInteraction_.isValid(Code::Proton, pCode, 100_GeV)) {
+      CORSIKA_LOG_ERROR("Invalid target type {} for hadron interaction model.", pCode);
       return;
     }
+
     int const k = targetComponentsIndex_.at(pCode);
     Code const pNuclei[] = {Code::Helium, Code::Lithium7, Code::Oxygen,
                             Code::Neon,   Code::Argon,    Code::Iron};
@@ -109,12 +110,12 @@ namespace corsika::sibyll {
     // loop over target components, at most 4!!
     int k = -1;
     for (Code const ptarg : allElementsInUniverse) {
-      if (ptarg == Code::Argon) continue; // NEED TO IGNORE Argon ....
       ++k;
       CORSIKA_LOG_DEBUG("init target component: {} A={}", ptarg, get_nucleus_A(ptarg));
       int const ib = get_nucleus_A(ptarg);
       if (!hadronicInteraction_.isValid(Code::Proton, ptarg, 100_GeV)) {
-        throw std::runtime_error("Invalid target type.");
+        CORSIKA_LOG_ERROR("Invalid target type {} for hadron interaction model.", ptarg);
+        continue;
       }
       targetComponentsIndex_.insert(std::pair<Code, int>(ptarg, k));
       // loop over energies, fNEnBins log. energy bins
diff --git a/corsika/modules/Epos.hpp b/corsika/modules/Epos.hpp
index c25be9b14b615e797bb821d06d2bc27b7b23353a..b4aa9086cf563e35b0ffb23d4aa9c85f6375cf60 100644
--- a/corsika/modules/Epos.hpp
+++ b/corsika/modules/Epos.hpp
@@ -9,4 +9,22 @@
 #pragma once
 
 #include <corsika/modules/epos/ParticleConversion.hpp>
-#include <corsika/modules/epos/Interaction.hpp>
+#include <corsika/modules/epos/InteractionModel.hpp>
+#include <corsika/framework/process/InteractionProcess.hpp>
+
+/**
+ * @file Sibyll.hpp
+ *
+ * Includes all the parts of the EPOS model. Defines the InteractionProcess<TModel>
+ * classes needed for the ProcessSequence.
+ */
+
+namespace corsika::epos {
+  /**
+   * epos::Interaction is the process for ProcessSequence.
+   *
+   * The epos::InteractionModel is wrapped as an InteractionProcess here in order
+   * to provide all the functions for ProcessSequence.
+   */
+  class Interaction : public InteractionModel, public InteractionProcess<Interaction> {};
+} // namespace corsika::epos
\ No newline at end of file
diff --git a/corsika/modules/epos/Interaction.hpp b/corsika/modules/epos/InteractionModel.hpp
similarity index 97%
rename from corsika/modules/epos/Interaction.hpp
rename to corsika/modules/epos/InteractionModel.hpp
index 96306b8fa89db4958d1ecb8227fe49733721509d..5a2c4a2901844988cb6d696c0d390022ae794b7d 100644
--- a/corsika/modules/epos/Interaction.hpp
+++ b/corsika/modules/epos/InteractionModel.hpp
@@ -12,7 +12,6 @@
 #include <corsika/framework/core/PhysicalUnits.hpp>
 #include <corsika/framework/geometry/FourVector.hpp>
 #include <corsika/framework/random/RNGManager.hpp>
-#include <corsika/framework/process/InteractionProcess.hpp>
 #include <tuple>
 
 namespace corsika::epos {
@@ -98,4 +97,4 @@ namespace corsika::epos {
 
 } // namespace corsika::epos
 
-#include <corsika/detail/modules/epos/Interaction.inl>
+#include <corsika/detail/modules/epos/InteractionModel.inl>