Index: utils/mt-old-to-new.sh
==================================================================
--- utils/mt-old-to-new.sh
+++ utils/mt-old-to-new.sh
@@ -1,6 +1,12 @@
 #!/bin/bash 
+if [ -d ".megatest" ]
+then
+  echo ".megatest directory present."
+  echo "You have already migerated. "
+  exit
+fi
 
 mkdir -p .megatest
 cp megatest.db .megatest/main.db
 sqlite3 .megatest/main.db << END_SQL
 delete from tests; 
@@ -12,17 +18,24 @@
 
 
 sqlite3 megatest.db 'select id from runs' > runs.txt
 for run in $(cat runs.txt)
 do
+   echo "working on run id $run"
    dbnum=$(($run%100))
-   cp megatest.db .megatest/$dbnum.db
-   sqlite3 .megatest/$dbnum.db  << END_SQL
-   delete from tests where run_id != $run; 
-   delete from test_data; 
-   delete from test_meta; 
-   delete from test_rundat;
-   delete from test_steps where not exists ( select id from tests where tests.id = test_steps.test_id);
-   replace into metadat (id,var,val) values($version_id,'MEGATEST_VERSION','$current_version');
+   if [ ! -f ".megatest/$dbnum.db" ]
+   then
+     dbnum=$(($run%100))
+     cp megatest.db .megatest/$dbnum.db
+     sqlite3 .megatest/$dbnum.db  << END_SQL
+     delete from tests where run_id in (select id from runs where id%100!=$dbnum); 
+     delete from test_data; 
+     delete from test_meta; 
+     delete from test_rundat;
+     delete from test_steps where not exists ( select id from tests where tests.id = test_steps.test_id);
+     replace into metadat (id,var,val) values($version_id,'MEGATEST_VERSION','$current_version');
+     VACUUM;
 END_SQL
+    	
+    fi
 done