Hi Gerd,

Analyzing and comparing the syntax of your test osm file with my test one, I found an error in my syntax. The roundabout where I get the unexpected behavior, the first and the last nodes aren't the same. 
I mean, the wrong syntax was the one below: 

 <node id="3" lat="-20.4545397" lon="-40.4486877" visible="true" version="1"/>
 <node id="15" lat="-20.4566083" lon="-40.4487237" visible="true" version="1"/>
 <node id="20" lat="-20.4540903" lon="-40.4498724" visible="true" version="1"/>
 <node id="18" lat="-20.4544979" lon="-40.4510719" visible="true" version="1"/>
 <node id="21" lat="-20.4555235" lon="-40.4515836" visible="true" version="1"/>
 <node id="19" lat="-20.4565664" lon="-40.4511078" visible="true" version="1"/>
 <node id="22" lat="-20.4570158" lon="-40.4499232" visible="true" version="1"/>
 <node id="23" lat="-20.4555826" lon="-40.4482119" visible="true" version="1"/>
 <node id="24" lat="-20.4540903" lon="-40.4498724" visible="true" version="1"/>
 <way id="17" visible="true" version="1">
  <nd ref="20"/>
  <nd ref="18"/>
  <nd ref="21"/>
  <nd ref="19"/>
  <nd ref="22"/>
  <nd ref="15"/>
  <nd ref="23"/>
  <nd ref="3"/>
  <nd ref="24"/>
  <tag k='highway' v='unclassified' />
  <tag k='junction' v='roundabout' />
  <tag k="oneway" v="yes"/>
  <tag k="name" v="ROTATÓRIA"/>
 </way>

...when should be:

 <node id="3" lat="-20.4545397" lon="-40.4486877" visible="true" version="1"/>
 <node id="15" lat="-20.4566083" lon="-40.4487237" visible="true" version="1"/>
 <node id="20" lat="-20.4540903" lon="-40.4498724" visible="true" version="1"/>
 <node id="18" lat="-20.4544979" lon="-40.4510719" visible="true" version="1"/>
 <node id="21" lat="-20.4555235" lon="-40.4515836" visible="true" version="1"/>
 <node id="19" lat="-20.4565664" lon="-40.4511078" visible="true" version="1"/>
 <node id="22" lat="-20.4570158" lon="-40.4499232" visible="true" version="1"/>
 <node id="23" lat="-20.4555826" lon="-40.4482119" visible="true" version="1"/>
 <way id="17" visible="true" version="1">
  <nd ref="20"/>
  <nd ref="18"/>
  <nd ref="21"/>
  <nd ref="19"/>
  <nd ref="22"/>
  <nd ref="15"/>
  <nd ref="23"/>
  <nd ref="3"/>
  <nd ref="20"/>
  <tag k='highway' v='unclassified' />
  <tag k='junction' v='roundabout' />
  <tag k="oneway" v="yes"/>
  <tag k="name" v="ROTATÓRIA"/>
 </way>

Thank you very much by your time. Your analysis showed me the way so I could diagnose my problem.

Regards,

Alexandre

2016-07-07 4:09 GMT-03:00 Gerd Petermann <GPetermann_muenchen@hotmail.com>:

Hi Alexandandre,


I tried to reproduce the problem using the attached input file. Routing works for both cases.

So there is probably more to it. If you can reproduce the problem, please let me know how.


Gerd

Von: Gerd Petermann
Gesendet: Mittwoch, 6. Juli 2016 18:12:22
An: Development list for mkgmap
Betreff: AW: [mkgmap-dev] Fwd: Wrong routing in some closed roundabount
 

Hi Alexandre,


seems that you have test data. Please post a link to it.


Gerd

Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Alexandre Loss <alexandre.loss@gmail.com>
Gesendet: Mittwoch, 6. Juli 2016 12:08:11
An: Development list for mkgmap
Betreff: [mkgmap-dev] Fwd: Wrong routing in some closed roundabount
 
Hi Gerd,

Now you are back, please take a look at this problem when you have time.
Thanks.

Alexandre Loss

---------- Forwarded message ----------
From: Alexandre Loss <alexandre.loss@gmail.com>
Date: 2016-06-06 13:35 GMT-03:00
Subject: Wrong routing in some closed roundabount
To: Development list for mkgmap <mkgmap-dev@lists.mkgmap.org.uk>


Hi guys,

We note in our group a strange behavior in some roundabounts that are complete loops. Investigating, we discovered that when the starting and ending points of a roundabout coincides with a routable node, we are able to route through this roundabout. However, if the starting and ending points of a roundabout don't match a rountable node, we have problem to route through this roundabout.

The example bellow shows this clearly when trying to create a route em Mapsource from point A to B:

Imagem inline 2

Thank you for your time.

Alexandre Loss


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