diff --git a/src/storm/models/sparse/Model.cpp b/src/storm/models/sparse/Model.cpp
index b9554c75c..42b20db74 100644
--- a/src/storm/models/sparse/Model.cpp
+++ b/src/storm/models/sparse/Model.cpp
@@ -57,7 +57,7 @@ namespace storm {
                     STORM_LOG_THROW(stateCount == this->getTransitionMatrix().getColumnCount(), storm::exceptions::IllegalArgumentException, "Can not create deterministic model: Number of columns of transition matrix does not match state count.");
                     STORM_LOG_ERROR_COND(!components.player1Matrix.is_initialized(), "Player 1 matrix given for a model that is no stochastic game (will be ignored).");
                 } else if (this->isOfType(ModelType::Mdp) || this->isOfType(ModelType::MarkovAutomaton) || this->isOfType(ModelType::Pomdp)) {
-                    STORM_LOG_THROW(stateCount == this->getTransitionMatrix().getRowGroupCount(), storm::exceptions::IllegalArgumentException, "Can not create nondeterministic model: Number of row groups of transition matrix does not match state count.");
+                    STORM_LOG_THROW(stateCount == this->getTransitionMatrix().getRowGroupCount(), storm::exceptions::IllegalArgumentException, "Can not create nondeterministic model: Number of row groups (" << this->getTransitionMatrix().getRowGroupCount() << ") of transition matrix does not match state count (" << stateCount << ").");
                     STORM_LOG_THROW(stateCount == this->getTransitionMatrix().getColumnCount(), storm::exceptions::IllegalArgumentException, "Can not create nondeterministic model: Number of columns of transition matrix does not match state count.");
                     STORM_LOG_ERROR_COND(!components.player1Matrix.is_initialized(), "Player 1 matrix given for a model that is no stochastic game (will be ignored).");
                 } else {