recently my pattern terminal ctds me and my crash report states
"PM Description: Rendering screen java.lang.IllegalStateException: Already tesselating!"

http://pastebin.com/4Cazxp2P

all help would be appreciated.

Note I find this problem to be only on one of my pattern terminals...
the one i use the most... not sure why still.

Try removing the ExtendedRenderer mod and/or mpm.

MPM is MorePlayerModels. If you take a look at the mod list in the crash report you posted, you will find a mod called ExtendedRenderer and one called mpm. Try removing either one or both of those to see if they are the culprit.

to the aabove what is "MPM and i dont beleive i have an extended renderer mod and if i do i not know which mod is doing that.

Thank you MPM seemed o be the issue. shame i really liked that mod.

Report this to the MPM devs, maybe they can fix this.