Hi, some months ago, I noticed that my optimal routing seemed slower than usual to complete.  I spoke to Nick about it and one suggestion was to turn off 'avoid vector land chart'.  Doing this certainly sped up the routing.  Now however, I often find I can't route near land because I get a message saying words to the effect " couldn't complete routing as wind forecast did not cover the time period required, or wind parameters were wrong , or you are using avoid vector land chart".

Sometimes I do need a routing which avoids land, so how can I get a such a routing, given I keep getting this message.  

cheers and thanks
John