messages file memory error

Hi,
Does anyone know if this is a patch error or a real memory problem, its happening a lot and wanted to know what to expect if I reboot it.
prtdiag shows no errors.

the system is anetra running solaris9 5.9 Generic sun4u sparc SUNW,UltraSPARC-IIi-cEngine

Jan 5 15:23:39 t1 last message repeated 2 times
Jan 5 15:23:39 t1 unix: [ID 356634 kern.notice] 0 Intermittent, 0 Persistent, and 256 Sticky Softerrors accumulated
Jan 5 15:23:39 t1 unix: [ID 340762 kern.notice] from Memory Module Lower
Jan 5 15:23:39 t1 unix: [ID 908439 kern.notice] [AFT0] Multiple Softerrors:
Jan 5 15:23:39 t1 last message repeated 1 time
Jan 5 15:23:39 t1 unix: [ID 356634 kern.notice] 0 Intermittent, 0 Persistent, and 256 Sticky Softerrors accumulated

Theres no special software running only ftam vsn 9. I also have another server built for disaster recovery which I an invoke if need be but dont want to invoke a panic : (

log a case with SUN