[Coin-discuss] specialoptions

[Esben Mose Hansen]

Hi,

I was wondering if someone would shed a bit of light over the specialoptions 
in CbcModel. It seems everyone sets this member variable to 192=168|64|1. 
>From the documentation:

int   specialOptions_
     0 bit (1) - check if cuts valid (if on debugger list) 
     1 bit (2) - use current basis to check integer solution (rather than all 
slack) 
     2 bit (4) - don't check integer solution 3 bit (8) - Strong is doing 
well - keep on 

I'm not sure what "if on debugger list" is meant to be... but I assume that 
cut generators are not usually on "debugger list", and thus this option have 
no effect. 

But what about bit 6 (64) and 7(128)? I tried to look at the code, but it is 
not immediately obvious to me what these 2 options do.

-- 
kind regards, Esben