deploy.

App/wwwroot/HiAPI-docsite/api/Hi.MachiningProcs.LocalProjectService.html

@@ -1943,7 +1943,12 @@ otherwise falls back to <a class="xref" href="Hi.Numerical.HardNcEnv.html#Hi_Num
   
   </h3>
 
-  <div class="markdown level1 summary"><p>Closes the current project.</p>
+  <div class="markdown level1 summary"><p>Closes the current project. Like the other five project-file operations
+this runs under <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.action">RunExclusiveProjectFileOp(Action)</a>: a close arriving
+while a load or a save holds the file is cancelled with
+<a class="xref" href="Hi.MachiningProcs.ProjectFileBusyException.html">ProjectFileBusyException</a> instead of interleaving with it.
+It was the one operation left outside the gate, which is why
+<code>ProjectController.CloseProject</code>'s 409 handler could never fire.</p>
 </div>
   <div class="markdown level1 conceptual"></div>
 
@@ -1960,6 +1965,12 @@ otherwise falls back to <a class="xref" href="Hi.Numerical.HardNcEnv.html#Hi_Num
 
 
 
+  <h4 class="section">Exceptions</h4>
+  <dl class="parameters">
+    <dt><a class="xref" href="Hi.MachiningProcs.ProjectFileBusyException.html">ProjectFileBusyException</a></dt>
+    <dd><p>Another project-file operation is in progress.</p>
+</dd>
+  </dl>