Invalid subckt definition name

Question

Not sure why the below errors occur. I created the attached IPD135N031.cir file from the OptiMOS3_30V_40V.lib file (changed to a txt file in order to post). I use the IPD135N031.cir file in the Select Simulation model > Load From File step 6 of the Component Wizard. 
------ Checking SPICE netlist for diode driver - Wednesday, May 18, 2011, 1:33:32 PM ------
SPICE Netlist Error in schematic RefDes 'u1', element 'x1':  Invalid subckt definition name 's4_30_h_var'
SPICE Netlist Error in schematic RefDes 'u1', element 'ipd135n03l__mosfet__2':  Due to errors, the subckt instance 'x1' has been omitted from the simulation
SPICE Netlist Error in schematic RefDes 'u1', element 'xu1':  Not enough nodes found
======= SPICE Netlist check completed, 3 error(s), 0 warning(s) =======
Thanks
Attachments:
IPD135N03L.cir ‏2 KB
OptiMOS3_30V_40V.txt ‏489 KB

Answer 1

Hi,
In IPD135N031.cir file you attached, there is a line that starts with:
X1  d1 g s Tj S4_30_h_var
This line is a call command in spice, it's looking for another model called :s4_30_H_H_var.  You did not include the second model and that's why you got the error message.
The attached file is the complete model.  I made one modification to the syntax that you should know about.  In the model, one of the expressions has a log function.  If left that way, Multisim will treat log()expression as ln(), otherwise you have to use log10.  I changed the expresssion to log10.
Tien P.
National Instruments
Attachments:
IPD135N03L_complete.txt ‏5 KB