Opened 10 years ago
Last modified 3 years ago
#2924 accepted defect
Extending a model fails
| Reported by: | Owned by: | Adrian Pop | |
|---|---|---|---|
| Priority: | high | Milestone: | Future |
| Component: | Frontend | Version: | trunk |
| Keywords: | Cc: |
Description
I have a model (unfortunately, proprietary, so i can't put it here) that I have been working with that is now causing me some difficulties. The base model is working fine. I then extended that model, with some additions, and it is also working fine.
The strange difficulty that I am running into, is that if I extend that model, I run into errors. And, the occur, even if I do nothing but this:
model Model3
extends Model2;
end Model3;
If I check Model2, I see that it is balanced with 894 equations and 894 variables. And it runs just fine.
If I check Model3 (created with nothing but extends, as above, and no actual additions or changes) it shows 1264 equations and 1571 variables (!?!?). If I try to run this model, I see a bunch of "Model is structurally singular, error found sorting equations", "Internal error pre-optimization model clockPartioning failed", "Too many equations, over-determined system. The model has 1264 equations and 894 variables"
I don't see how extending a model, with no changes, or even just a minor addition, can cause the addi4tion of hundreds of equations and variables.
Change History (5)
comment:1 by , 10 years ago
comment:2 by , 10 years ago
No, it doesn't have inner/outer, expandable, or overconstrained connectors.
comment:3 by , 10 years ago
Then is really strange that extending the model doesn't work.
Unfortunately we don't have a model to debug with is hard to
find out what the problem is.
comment:4 by , 10 years ago
| Component: | Unknown → Frontend |
|---|---|
| Owner: | changed from to |
| Status: | new → accepted |
After I got a debug model I found out where the problem is.
It seems that in some cases where we have redeclare-as-element the element is
generated twice in the DAE instead of being send as a modifier to the extends
clause and generated only once. I'll debug a bit more to see where this happens.
Hi,
Do you have use any inner/outer or expandable connectors in your model?
How about overconstrained connectors?
If you want you can send the model to us privately
and we will use it for debugging and then delete it.
Cheers,
Adrian Pop/