Pangea option sometimes fail -- why?

[Milan's Warrior]

I noticed that the pangea option in sometimes fails to produce a pangea (even when land in maxed out; even with map standard size).

How comes?
Is there any way to get a pangea for sure?

 

[SesnOfWthr]

I've had this happen in both a solo and a SG. Sometimes the algorithms or whatever just seem to fail and there is usually only a one tile gap. No, I don't think there is any way to "guarantee" a pangaea.

 

[Gengis Khan]

Check out DI1 in the SG forum for a spectacular failure in producing a pangea. We had a freaking island big enough to support 2 Civs starting locations in addition to the main mass, plus many other sprinkled islands all about.

Don't know why, but it sure is annoying.