Thanks Martin, I found the mistake. I read the Book but, in the description of "debug" command, it pointed me to the "scrap" command, but I wasn't able to find the word "yellow", hence I mailed the list :-)

Thanks again,
Marco

On Sun, Jul 3, 2016 at 12:35 PM, Martin Sluka <martinsluka@mac.com> wrote:
Please, read the part about debug command in TherionBook.

The yellow lines represents the biggest distortion of your original sketch. Something wrong is around stations 7 and 8.

Check, please, if there are not two stations with different names in the same place.

s.s.

> 3. 7. 2016 v 12:20, Marco Menchise <marco.menchise@gmail.com>:
>
> Hello,
> here's a picture I got by cropping a plan map made by Therion with the option "debug all" in the layout.
>
> I noticed a strange yellow symbol and also Therion "distorted" my drawings. I can't figure out why. Could someone please clarify me?
>
> The station order is 4-7-8-9-10 and 4-5-6 (station 4 is a common point between two paths). My original drawings are in red, the final results are in blue.
>
> I wouldn't expect any distortion because I drew directly on real survey data (I used DistoX and Topodroid). Also, I can't figure out what the two small red lines connected by the yellow one are. I didn't draw them.. Any hint?
>
> Thanks,
> Marco
> <Screen Shot 2016-07-03 at 11.58.55.png>
>
>
>
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