Opened 4 years ago

Last modified 4 years ago

#6198 closed defect

Index reduction issue in Buildings: the backend tries to differentiate a discontinuous expression — at Version 3

Reported by: Francesco Casella Owned by: Karim Adbdelhak
Priority: critical Milestone: 1.18.0
Component: Backend Version:
Keywords: Cc: Andreas Heuermann

Description (last modified by Francesco Casella)

Please check ​Buildings.Examples.ChillerPlant.DataCenterRenewables. The backend fails with

[/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/Compiler/BackEnd/Differentiate.mo:265:5-265:157:writable]
Error: Derivative of expression "bat.P = if con.multiSwitch1.firstActiveIndex == 0 then con.multiSwitch1.y_default else con.multiSwitch1.expr[con.multiSwitch1.firstActiveIndex]"
w.r.t. "time" is non-existent.

I'm not sure why the backend tries to differentiate that expression. Dymola and JModelica compile the model without any problem.

Change History (3)

comment:1 by Francesco Casella, 4 years ago

Summary: Index reduction issue in Buildings → Index reduction issue in Buildings: the backend tries to differentiate a discontinuous expression

comment:2 by Francesco Casella, 4 years ago

Milestone: 1.17.0 → 1.18.0

comment:3 by Francesco Casella, 4 years ago

Description: modified (diff)
Note: See TracTickets for help on using tickets.