Throw exception for unknown protocols in case of carbon-unit error

diff --git a/src/jalview/io/FileParse.java b/src/jalview/io/FileParse.java
index cb3b122..cd59a55 100755 (executable)
--- a/src/jalview/io/FileParse.java
+++ b/src/jalview/io/FileParse.java
@@ -204,7 +204,11 @@ public class FileParse
         error = true;
       }
     }
-    if (dataIn==null)
+    else {
+      errormessage = "PROBABLE IMPLEMENTATION ERROR : Datasource Type given as '"+(type!=null ? type : "null")+"'";
+      error=true;
+    }
+    if (dataIn==null || error)
     {
       // pass up the reason why we have no source to read from
       throw new IOException("Failed to read data from source:\n"+errormessage);