id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
6095	Bogus accounting of (discrete?) equations and variables in Buildings	Francesco Casella	Karim Adbdelhak	"Please check [https://libraries.openmodelica.org/branches/master/Buildings_7.0.0/files/Buildings_7.0.0_Buildings.Controls.DemandResponse.Examples.ClientLBNL90.err Buildings.Controls.DemandResponse.Examples.ClientLBNL90]. The frontend reports
{{{
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 11299
 * Number of variables: 11299
}}}
The backend then reports
{{{
Notification: Performance of Generate backend data structure: time 0.08858/0.4659, allocations: 35.17 MB / 0.7867 GB, free: 14.35 MB / 0.6667 GB
Notification: Performance of prepare preOptimizeDAE: time 5.442e-05/0.466, allocations: 8.031 kB / 0.7867 GB, free: 14.34 MB / 0.6667 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0131/0.4791, allocations: 3.61 MB / 0.7902 GB, free: 10.69 MB / 0.6667 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.03833/0.5175, allocations: 10.55 MB / 0.8005 GB, free: 48 kB / 0.6667 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.635/1.152, allocations: 2.522 MB / 0.803 GB, free: 80.17 MB / 0.6667 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.01173/1.164, allocations: 3.745 MB / 0.8067 GB, free: 78.93 MB / 0.6667 GB
Error: An independent subset of the model has imbalanced number of equations (11256) and variables (312).
}}}
Then, 312 variables are listed, and then a set of equations is then reported, with equations numbered from 1 to 290, which is less than 312 and a lot less than 11256. 

I can't really make sense of this output, but I guess @Karim can figure that out easily by looking at the output of this example and doing a bit of debugging."	defect	closed	blocker	1.19.0	Backend		fixed		Michael Wetter