EPU: Handle case where no elements, but add_processor_id specified

Author: gsjaardema

packages/seacas/applications/epu/EP_SystemInterface.h

@@ -56,6 +56,7 @@ namespace Excn {
 
     bool add_nodal_communication_map() const { return addNodalCommunicationMap_; }
     bool add_processor_id_field() const { return addProcessorIdField_; }
+    void set_processor_id_field(bool yes_no) { addProcessorIdField_ = yes_no; }
     bool add_processor_id_map() const { return addProcessorIdMap_; }
     bool sum_shared_nodes() const { return sumSharedNodes_; }
     bool use_netcdf4() const { return useNetcdf4_; }

packages/seacas/applications/epu/EP_Version.h

@@ -1,5 +1,5 @@
 /*
- * Copyright(C) 1999-2024 National Technology & Engineering Solutions
+ * Copyright(C) 1999-2025 National Technology & Engineering Solutions
  * of Sandia, LLC (NTESS).  Under the terms of Contract DE-NA0003525 with
  * NTESS, the U.S. Government retains certain rights in this software.
  *
@@ -11,6 +11,6 @@
 
 static const std::array<std::string, 3> qainfo{
     "epu --  E Pluribus Unum",
-    "7.00",
-    "2024/12/10",
+    "7.01",
+    "2024/03/13",
 };

packages/seacas/applications/epu/epu.C

@@ -1116,6 +1116,9 @@ int epu(SystemInterface &interFace, int start_part, int part_count, int cycle)
     Variables edgeblock_vars(Excn::ObjectType::EDBLK);
     Variables faceblock_vars(Excn::ObjectType::FABLK);
 
+    if (glob_blocks.empty()) {
+      interFace.set_processor_id_field(false);
+    }
     element_vars.addProcessorId = interFace.add_processor_id_field();
 
     {