I'm almost finished with the game so I thought I'd start a new one with a different tribe. I've started 4 tribes but each time the Tech points are stuck at 99 so I've had to delete them. I've got it set at normal speed and haven't tried any time travel or anything. Can I play more than one tribe at a time?

Dunno why yer Tech points are stuck, but yes, you may play several (up to 5 on one puter) tribes at the same time.

Jer

The tech points start out at 99, but should increase as your researchers are successful at the research table. You should also be able to increase them by having the children put duplicate collectibles into the hut. What happens if you do that?

How long do you give the counter to move? IIRC the game starts with 99 points. Remember that your villager may not succeed in researching on the first few attempts, so will get no points. If the counter truly does not move I suggest you post in the support forum. See The games log file...everyone read this! thread for tips, especially about the log file.

I started the fire, caught some fish, found some mushrooms and collectables - no change in the tech count. Exited and came back later, hut is 40% complete, lots of food. No change in tech points. Skills bar has reflected improvement.

u need to drag a villager to table and get them to turn to scuentusts then tech points go up may take couple dragging goes to work

Only researching at the tech table, and duplicate collectibles (ie say you have a white butterfly already and they find another one, the second one would be a duplicate) will give you tech points. Finding food, building huts, etc don't give tech points.