id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
3684	index reduction fails with a singular jacobian	Adam Dershowitz	Willi Braun	"I have run into a problem where one of my models shows no results in OMEdit.  If I run a simulation and then I try to plot results for any variables, I don't see any values, except for variables that don't change at all.  Even ""time"" doesn't show anything.
The model doesn't report any errors, and appears to complete.
To debug I tried to output a csv and then to just view it.  That file has just a single row of data after the header.  My other models seem to work correctly (at least I haven't yet seen this error with other models)
I have tested a number of different versions and I have narrowed down  the problem's appearance:
The problem doesn't occur in 1.9.4~dev-701 but does occur in 1.9.4~dev.beta1-3-g3e511de and all ""beta1"" versions I have tried since then (I haven't tried every one, but I have tried as recent as 1.9.4~dev.beta1-94-g8721141.)
Unfortunate, I can't publicly post the model that is showing this problem.  Any suggestions for what might be wrong?  It seems as though either the simulation just quits early, with no error, or the simulation just doesn't write the data that it should, with no error."	defect	closed	critical	1.9.4	Backend	v1.9.4-dev-nightly	fixed