<p>Dear GrADS colleagues,<br> <br>I'm having some problems with <a href="http://mask.gs">mask.gs</a>.<br> <br>here is the erro message i have received:<br> <br> --> non-numeric args to numeric operation<br> --> erro ocurred on line 40<br>
--> in file d:\<a href="http://mask.gs">mask.gs</a></p>
<p>Could anybody give some directions?<br> <br>Best regards,<br> <br>luan jia</p>