Error in MIQCP sample model

GAMS
1

Hi All,

I’m trying to code the below model. Can anyone tell me what’s wrong with my code? everything seems to be same with the instruction.

http://yetanothermathprogrammingconsultant.blogspot.com.au/2018/01/solving-facility-location-problem-as.html

Regards,
Sean
MIQCP Sample-Erwin.gms (2.03 KB)

2

Sean,

**2 is real-power (rpower, see https://www.gams.com/latest/docs/UG_Parameters.html#UG_Parameters_dmrpower) and requires NLP model type. For quadratic models you need to use power or sqr.

-Michael

3

Hi Michael,

Thanks for your point. It works now. Just a quick question on the same problem. I have difficulty in displaying variable Floc(j,c) (set c = {x,y} ). How can i display locations of floc.l as (j,x,y) as currently it just returns as floc(j,x) for floc(j,c) (and y is missed)?

Thanks in advance
Regards,
Sean

4

All good now thanks.