diff --git a/OndselSolver/DiagonalMatrix.h b/OndselSolver/DiagonalMatrix.h
index ac73c50..4cb9eef 100644
--- a/OndselSolver/DiagonalMatrix.h
+++ b/OndselSolver/DiagonalMatrix.h
@@ -13,7 +13,7 @@
 #include "FullMatrix.ref.h"
 #include "DiagonalMatrix.ref.h"
 #include "Array.h"
-//#include "FullColumn.h"
+#include "FullColumn.h"
 //#include "FullRow.h"
 // #include "FullMatrix.h"
 
@@ -45,5 +45,6 @@ namespace MbD {
 		std::ostream& printOn(std::ostream& s) const override;
 
 	};
+    template class DiagonalMatrix<double>;
 }
 
diff --git a/OndselSolver/EulerAngles.h b/OndselSolver/EulerAngles.h
index ef3a678..d45c25d 100644
--- a/OndselSolver/EulerAngles.h
+++ b/OndselSolver/EulerAngles.h
@@ -35,5 +35,6 @@ namespace MbD {
 		FMatDsptr aA;
 
 	};
+    template class EulerAngles<std::shared_ptr<MbD::Symbolic>>;
 }
 
diff --git a/OndselSolver/EulerParameters.h b/OndselSolver/EulerParameters.h
index 2d93041..40bda2a 100644
--- a/OndselSolver/EulerParameters.h
+++ b/OndselSolver/EulerParameters.h
@@ -42,7 +42,6 @@ namespace MbD {
 			this->initialize();
 			this->calc();
 		}
-
 		static std::shared_ptr<FullMatrixFullColumnDouble> ppApEpEtimesColumn(FColDsptr col);
 		static FMatDsptr pCpEtimesColumn(FColDsptr col);
 		static FMatDsptr pCTpEtimesColumn(FColDsptr col);
@@ -60,4 +59,5 @@ namespace MbD {
 		FMatDsptr aC;
 		FColFMatDsptr pApE;
 	};
+    template class EulerParameters<double>;
 }
diff --git a/OndselSolver/FullColumn.h b/OndselSolver/FullColumn.h
index 9088a97..37e3d49 100644
--- a/OndselSolver/FullColumn.h
+++ b/OndselSolver/FullColumn.h
@@ -48,6 +48,10 @@ namespace MbD {
 
 		std::ostream& printOn(std::ostream& s) const override;
 	};
-    template class FullVector<double>;
+    // instantiate on purpose:
+    template class FullColumn<double>;
+    template class FullColumn<int>;
+//    template class FullColumn<std::shared_ptr<MbD::FullMatrixDouble>>;
+//    template class FullColumn<std::shared_ptr<MbD::Symbolic>>;
 }
 
diff --git a/OndselSolver/FullRow.h b/OndselSolver/FullRow.h
index 75d1935..0ca02f4 100644
--- a/OndselSolver/FullRow.h
+++ b/OndselSolver/FullRow.h
@@ -147,6 +147,7 @@ namespace MbD {
 		}
 		s << "}";
 		return s;
-	}
+	};
+    // TODO: template class FullRow<double>;
 }