[gecode-users] Grey subtrees in Gist

[Christian Schulte]

Hi Tommaso,

Your brancher has a bug ;-) It claims to have a certain number of
alternatives (as defined by the alternatives() member function of the
brancher's choice object class) but later alternatives are tried (via the
commit() function) during search which have a number larger than what
alternatives() reports.

Maybe you do not properly initialize the number of alternatives in your
choice class?

Cheers
Christian

--
Christian Schulte, Professor of Computer Science, KTH,
www.ict.kth.se/~cschulte/

-----Original Message-----
From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
Of Tommaso Urli
Sent: Tuesday, January 14, 2014 5:29 PM
To: users at gecode.org list
Subject: [gecode-users] Grey subtrees in Gist

Hi everyone,
     today I was messing with a custom brancher for a model, and I got these
grey subtrees in Gist, however I can't find any documentation on what
exactly they are. Hint: running the same setup without Gist results in the
following error

Exception: Space::commit: Attempt to commit with illegal alternative.
Stopping...

I therefore ask for your help :)

Tommaso