[PyMOL] Problem Opening Session File

[Mike F. <mfe...@ho...>]

I created a session file with Pymol Version 1.5.0.4 that I am unable to open up on my laptop which is running 1.2r5pre. I am able to see the first state but all of the other remaining states are lost.  I haven't had opening session files with saved states in the past so I do not suspect it is a issue of compatibility between versions.  The one difference that I think is causing the problem is that the session contains an electron density map that does not appear to save along with the session.  Below is the message that I receive from when I go to the state containing the density map.  Has anyone else had this issue and been able to resolve it?  If so how?  
 This Executable Build integrates and extends Open-Source PyMOL 1.2r3pre.Warning: This session was created with a newer version of PyMOL (15.04).Warning: Some content may not load completely.ExectiveSetSession-Error: after names.ExectiveSetSession-Warning: restore may be incomplete.ObjectMeshUpdate-Error: map 'Density' has been deleted.
Thanks,Michael