Ok, I tried and verified that I have entered the data in correctly as per the FAQ. I run it and rebuild database. I put into the location D:FSX and it shows RC rebuilding r4.csv, running MakeRwys.exe. Then after clicking OK it says RC finished rebuilding r4.csv and I click OK. It then says RC rebuilding new A4.csv file. When I click ok it gives me the followingRun-time error '6' Overflow. I am running Vista Ultimate32bit with 4 gig ram with a EVGA 7900 video card on an AMD Dual core 4200. I will try to get it to work on a networked pc running XP pro but would like to get it to work on the main one. Ken

Hi Ken,I searched for other messages with this error message. See if this solution works for you http://forums.avsim.net/dcboard.php?az=sho...ing_type=searchIf it doesn't perhaps you could create a log and send to JD but he may not reply straight away due to personal circumstances.Cheers,

Thanks, Ray, I moved the Makerunways.exe file to the FSX rood dir and it worked just fine. My mistake. Ken

No worries Ken. Glad you're sorted :-)