<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>In TRNSYS Type56, when i click on the tab, external files and edit, it says "cannot open bui files" with no other message. However I can open after starting the TRNBuild and then open the bui file. Does this indicate problem with the walls and layers or simply a bug.<div><br></div><div>Jam Yang</div> </div></body>
</html>