I tried to run simultaneous equation system and forecast. In the forecast I encountered an overflow error message, saying that "Overflow in DO_ECIO.SOLVE(O=G)". ECIO is the name of the model. I tried to scale down some variables but it didn't work. Could someone please help me out or give a clue on how to resolve this. Thanks,
Zheng Tian
Overflow error
Moderators: EViews Gareth, EViews Moderator
-
- Fe ddaethom, fe welon, fe amcangyfrifon
- Posts: 13319
- Joined: Tue Sep 16, 2008 5:38 pm
Overflow error
Do you have logs in the specification? It can be quite easy to get an overflow when dealing with logs.
Follow us on Twitter @IHSEViews
Re: Overflow error
Yes, I have some variables that need to be transformed to log. The solution message of the ECIO model is like that
"Solve begin 15:01:29
2015Q4 NA generated for XIO15 - Overflow"
But XIO15 is not logarithmic. The forecast before 2015Q4 is good but in 2015Q4 all variables seem to stop there and accumulate to very big numbers.
"Solve begin 15:01:29
2015Q4 NA generated for XIO15 - Overflow"
But XIO15 is not logarithmic. The forecast before 2015Q4 is good but in 2015Q4 all variables seem to stop there and accumulate to very big numbers.
-
- Fe ddaethom, fe welon, fe amcangyfrifon
- Posts: 13319
- Joined: Tue Sep 16, 2008 5:38 pm
Overflow error
It sounds as though your system is explosive and is simply getting too big.
Follow us on Twitter @IHSEViews
Re: Overflow error
But it doesn't seem to be the out-of-memory problem. Is there any way to solve it?
-
- Fe ddaethom, fe welon, fe amcangyfrifon
- Posts: 13319
- Joined: Tue Sep 16, 2008 5:38 pm
Re: Overflow error
What do you mean by solve it? Your system is explosive. That's a valid result. It may not be the result you want, but there's no way to "solve" it without re-specifying your system.
Follow us on Twitter @IHSEViews
Re: Overflow error
OK. I'll work on change some equations in the system. Thanks for help
-
- Posts: 10
- Joined: Wed Oct 03, 2018 8:58 am
Re: Overflow error
Gareth- what does it mean that a system is explosive? I don't understand the terminology.
Thanks
Thanks
-
- Fe ddaethom, fe welon, fe amcangyfrifon
- Posts: 13319
- Joined: Tue Sep 16, 2008 5:38 pm
Overflow error
Generates number that are huge.
Imagine you have a model that says:
Y=10*y(-1)^3
With y_0=1000 and you forecast it for 100 periods - you’ll find you quickly get to a point where the numbers are infeasibly large.
Imagine you have a model that says:
Y=10*y(-1)^3
With y_0=1000 and you forecast it for 100 periods - you’ll find you quickly get to a point where the numbers are infeasibly large.
Follow us on Twitter @IHSEViews
Who is online
Users browsing this forum: No registered users and 37 guests