Opened 5 years ago

Last modified 4 years ago

#6433 assigned defect

Start values with fixed=false not appearing in NLS

Reported by: Tin Rabuzin <trabuzin@…> Owned by: Karim Adbdelhak
Priority: high Milestone:
Component: Backend Version: 1.18.0-dev
Keywords: Cc: Francesco Casella

Description

As you can see in the model, the value of the parameter startA that is solved in the initial equation does not appear as a start value of the parameter a when looking at the log of the NLS.

In this simple model the solver still converges, but for more complicated models this can cause nonconvergence.

Attachments (1)

ModelStartNotDefined.mo​ (316 bytes ) - added by Tin Rabuzin <trabuzin@…> 5 years ago.
A model demonstrating the issue

Download all attachments as: .zip

Change History (3)

by Tin Rabuzin <trabuzin@…>, 5 years ago

Attachment: ModelStartNotDefined.mo​ added

A model demonstrating the issue

comment:1 by Francesco Casella, 5 years ago

Component: *unknown* → Backend
Milestone: NeedsInput → 1.18.0
Owner: changed from somebody to Karim Adbdelhak
Status: new → assigned

It looks like we are not considering start attributs when determining the BLT ordering. @Karim, is that the case?

comment:2 by Francesco Casella, 4 years ago

Milestone: 1.18.0

Ticket retargeted after milestone closed

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