linear solver overflow

peggy

hi. i'm a really new user at tascflow. this is probably a really simple problem, but i can't find anything in my user documentation or on the net:

when i run tascflow3d, my model executes for one time step. then execution is terminated because of 'an overflow in the linear solver', says my OUT file. 1) is the overflow like when there are too many decimals and not enough room to store them? 2) what causes the overflow? i tried allocating more memory to tascflow3d, but that doesn't work. my grid isn't big...it's only about 500,000 nodes.

i'd be grateful for any help. thanks.

peggy