Maximum number of allocation groups

[rblum50]

I recall reading somewhere that depending upon what kind of document you are using, there is a maximum number of allocation classes allowed based upon the number of participants in the plan. For instance, with only 4 plan participants with a prototype document, you might not be able to put each individual into their own allocation group. Can anyone give me a cite as to where to go to get better informed on this?

Thanks

[Belgarath]

http://www.irs.ustreas.gov/pub/irs-tege/lrm_crosstest.pdf