Published on *OpenMx* (http://openmx.psyc.virginia.edu)

By *sbremer*

Created *08/08/2012 - 09:04*

Wed, 08/08/2012 - 09:04 — sbremer [1]

Hello again :)

I need some assistance:

When running my model (factor analysis with four indicators) with mxRun() I get a negative residual variance. So I used lbound = 0 for the estimate of this variance. The output gives me 0 for the estimate. I wonder whether OpenMx really estimates there or does it try to estimate in the direction of the old, negative estimate and stop at the lower bound of 0.

If this is not detailed enough I could provide my script and full output.

Thanks in advance!

Sophia

**Links:**

[1] http://openmx.psyc.virginia.edu/users/sbremer

[2] http://openmx.psyc.virginia.edu/thread/1530

[3] http://openmx.psyc.virginia.edu/thread/1411

[4] http://openmx.psyc.virginia.edu/forums/openmx-help/openmx-general-help