Network building enhancements

src/quality.c

@@ -7,7 +7,7 @@ Description:  implements EPANET's water quality engine
 Authors:      see AUTHORS
 Copyright:    see AUTHORS
 License:      see LICENSE
-Last Updated: 05/15/2019
+Last Updated: 02/03/2020
 ******************************************************************************
 */
 
@@ -63,8 +63,16 @@ int openqual(Project *pr)
     // Build nodal adjacency lists if they don't already exist
     if (net->Adjlist == NULL)
     {
+        // Check for too few nodes & no fixed grade nodes
+        if (net->Nnodes < 2) return 223;
+        if (net->Ntanks == 0) return 224;
+    
+        // Build adjacency lists
         errcode = buildadjlists(net);
         if (errcode ) return errcode;
+
+        // Check for unconnected nodes
+        if (errcode = unlinked(pr)) return errcode;
     }
 
     // Create a memory pool for water quality segments