Can Romans convert camps to cities?

[cdogg2011]

I've been playing as Rome for something like 550 turns now and just beat the long campaign conditions, even though I still have the entire eastern half of the map left to conquer.

One thing I haven't been able to do is convert camps to cities. I read somewhere that some camps can never be converted to cities, whilst others can be converted by destroying the nomadic herd building and then upgrading the sedentary agriculture building to the maximum level.

The problem is that I have already done this, but still have no option to convert the camps to cities. Is it possible for Rome to even do this, or does this only work for other factions?

[Dr Spork]

I am having the same problem with those north african camps as carthage. I have the highest level of sedentary farming but cannon convert anything. I also cannot build any colony there above teh basic trade outpost.