NamLe,
What kind of system are you trying to solve? You can do it with LabVIEW, but it will probably be a compination of hand and computer calculations. You can solve your system by dividing the solution into the two different steps: solve the algebraic system and solve the differential system. Please look through all of the ODE shipping examples for LabVIEW 6.1 (go to Find Examples and search for ODE) as well as the online help for all of the ODE VIs.
Randy Hoskin
Applications Engineer
National Instruments
http://www.ni.com/ask