<hr /><i>oehhar added on 2015-06-02 15:27:48 UTC:</i><br />
Proposed fix in branch [bug-ab9ad7b044] in checkin [ea054d339d].

The issue is as follows:

   *   Checkin [411a2eb59f] made double quotes around the SOAPAction header. The resulting list was: 'SOAPAction {"ws:action"}'.
   *   Then, there is a map that all "{}" are replaced by double quotes, resulting in 'SOAPAction ""ws:action""'.
   *   This is not a list any more which causes the http package to complain.

The fix is to remove the map commands:
<verbatim>
-                -headers [string map {\{ \" \} \"} $headers] \
+                -headers $headers \
</verbatim>
I can only guess the purpose of those.
I suppose they are just wrong.

The proposed fix also fixes a supposed list issue:
<verbatim>
set svcHeaders [dict get $serviceArr($serviceName) headers]
if {[llength $svcHeaders]} {
-        lappend headers $svcHeaders
+        set headers [concat $headers $svcHeaders]
}
</verbatim>

I would be happy for a review.

Harald