* PBN temp file checks before save

1 files changed, 4 insertions, 0 deletions

diff --git a/PBNFile.cs b/PBNFile.cs
index bec7fcd..5526623 100644
--- a/PBNFile.cs
+++ b/PBNFile.cs
@@ -58,6 +58,10 @@ namespace BCDD
 

         public void Save()

         {

+            if (this.outputFile == null)

+            {

+                throw new IOException("No boards written to PBN file, unable to save it.");

+            }

             this.outputFile.Flush();

             this.outputFile.Close();

             File.Delete(this.filename);