id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
4451	Unspecific error message: The given system is mixed-determined.	Oliver Lenord	Lennart Ochel	"""The given system is mixed-determined. [index > 3]
Please checkout the option ""+maxMixedDeterminedIndex""

The documentation of the compiler flag says:
""--maxMixedDeterminedIndex
Sets the maximum mixed-determined index that is handled by the initialization.
Integer (default 3).""

These messages should contain a hint about what is meant by a mixed determined system and its index. Based in the brief description of the compiler flag one can guess that it's probably related to the initialization. 

A hint what to look at in the model when this error message is thrown would be important.

In my case I'm not even sure if it's a bug in my model or a bug in OMC."	enhancement	assigned	high	2.0.0	Backend	v1.11.0		mixed-determined