diff --git a/include/atrip/SliceUnion.hpp b/include/atrip/SliceUnion.hpp
index bd04709..0a44fe0 100644
--- a/include/atrip/SliceUnion.hpp
+++ b/include/atrip/SliceUnion.hpp
@@ -418,6 +418,22 @@ template <typename F=double>
 
       LOG(0,"Atrip") << "INIT SliceUnion: " << name << "\n";
 
+#if defined(ATRIP_SOURCES_IN_GPU)
+      for (auto& ptr: sources) {
+        const CUresult sourceError =
+          cuMemAlloc(&ptr, sizeof(F) * sliceSize);
+        if (ptr == 0UL) {
+          throw "UNSUFICCIENT MEMORY ON THE GRAPHIC CARD FOR SOURCES";
+        }
+        if (sourceError != CUDA_SUCCESS) {
+          std::stringstream s;
+          s << "Error allocating memory for sources "
+            << "code " << sourceError << "\n";
+          throw s.str();
+        }
+      }
+#endif
+
       for (auto& ptr: sliceBuffers) {
 #if defined(HAVE_CUDA)
         const CUresult error =
diff --git a/src/atrip/Atrip.cxx b/src/atrip/Atrip.cxx
index e63e9c5..54c68a0 100644
--- a/src/atrip/Atrip.cxx
+++ b/src/atrip/Atrip.cxx
@@ -688,7 +688,7 @@ Atrip::Output Atrip::run(Atrip::Input<F> const& in) {
 #if defined(HAVE_CUDA)
       double *tupleEnergy;
       cuMemAlloc((DataPtr<double>*)&tupleEnergy, sizeof(double));
-#elif
+#else
       double _tupleEnergy(0.);
       double *tupleEnergy = &_tupleEnergy;
 #endif /* defined(HAVE_CUDA) */
@@ -727,7 +727,7 @@ Atrip::Output Atrip::run(Atrip::Input<F> const& in) {
         cuMemcpyDtoH((void*)&host_tuple_energy,
                      (DataPtr<double>)tupleEnergy,
                      sizeof(double));
-#elif
+#else
         double host_tuple_energy = *tupleEnergy;
 #endif /* defined(HAVE_CUDA) */