Throw errors if unsupported

Author: franzpoeschel

src/IO/ADIOS/ADIOS2IOHandler.cpp

@@ -720,6 +720,13 @@ void ADIOS2IOHandlerImpl::createDataset(
             "[ADIOS2] Creating a dataset in a file opened as read "
             "only is not possible.");
     }
+#if !openPMD_HAS_ADIOS_2_9
+    if (parameters.joinedDimension.has_value())
+    {
+        error::throwOperationUnsupportedInBackend(
+            "ADIOS1", "Joined Arrays require ADIOS2 >= v2.9");
+    }
+#endif
     if (!writable->written)
     {
         /* Sanitize name */

src/IO/HDF5/HDF5IOHandler.cpp

@@ -452,6 +452,12 @@ void HDF5IOHandlerImpl::createDataset(
             "[HDF5] Creating a dataset in a file opened as read only is not "
             "possible.");
 
+    if (parameters.joinedDimension.has_value())
+    {
+        error::throwOperationUnsupportedInBackend(
+            "ADIOS1", "Joined Arrays currently only supported in ADIOS2");
+    }
+
     if (!writable->written)
     {
         /* Sanitize name */

src/IO/JSON/JSONIOHandlerImpl.cpp

@@ -260,6 +260,12 @@ void JSONIOHandlerImpl::createDataset(
             "[JSON] Creating a dataset in a file opened as read only is not "
             "possible.");
     }
+    if (parameter.joinedDimension.has_value())
+    {
+        error::throwOperationUnsupportedInBackend(
+            "ADIOS1", "Joined Arrays currently only supported in ADIOS2");
+    }
+
     if (!writable->written)
     {
         /* Sanitize name */