id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
3303	wrongly detected under-determined system, probably caused by combination of algorithm and arrays	torsten.knodt+org.openmodelica@…	somebody	"I am fairly new to Modelica, but I am quite sure this is a bug or at least a bad error message:
Error: Too few equations, under-determined system. The model has 4 equation(s) and 5 variable(s).
Error: Internal error Transformation Module PFPlusExt index Reduction Method Pantelides failed!

The array used in the testcase has a size of 1. When I change to an equivalent model without an array, it works."	defect	closed	high	1.19.0	Backend	trunk	fixed