Who can tell me what's wrong

[niliany]

I wanna to simulate a circuit with proteus,but it says:

SIMULATION LOG
==============
Design: D:\Backup\work\Keil\My_Pro_Keil\DigitalTem\51MCU_CPLDV2.0.DSN
Doc. no.: <NONE>
Revision: <NONE>
Author: <NONE>
Created: 07/02/27
Modified: 09/04/10

Compiling source files...
Build completed OK.
Compiling netlist...
Linking netlist...
WARNING [ROOT10] : Parameter <INVERT> not defined in INVERT of U1.
WARNING [ROOT10] : Parameter <INVERT> not defined in INVERT of U2.
Partition analysis...

Simulating partition 1 [3EDA532D]...
PROSPICE Release 6.9 SP4 (C) Labcenter Electronics 1993-2006.
SPICE Kernel Version 3f5. (C) Berkeley University ERL.

Reading netlist...
ERROR: [U12_I1] D1WIO.DLL failed to create DSIM model for primitive type 'D1WIO'.
Reading SPICE models...
Building circuit...
Warning: Net #00082 has no DC path to ground.
Check pins: X1_CS-2, X1_L-1
Warning: Net #00083 has no DC path to ground.
Check pins: X1_L-2, X1_R-1
Warning: Net #00104 has no DC path to ground.
Check pins: U13-X2, U13_ADC#0001-A, X0B39721C#4-*, X0B396970#0-*, X1-1, X1_CP-1, X1_CS-1
Warning: Net #00105 has no DC path to ground.
Check pins: U13-X1, U13_ADC#0002-A, X0B39721C#3-*, X0B396970#1-*, X1-2, X1_CP-2, X1_R-2
Instantiating SPICE models...
Real Time Simulation failed to start
Totaliters=0, Totalsteps=0, Goodsteps=0, Badsteps=0


Simulation FAILED due to fatal simulator errors.

Who can tell me what's with that?
Many thanks!

Added after 1 minutes:

How to solve this problem ?

 

[dipnirvana]

seems that u don't have "ground" in the circuit

also,check if the model for the U2 is properly assigned ! What is "invert" parameter.

 

[logicon]

Yes. Check the connection for U12 and U13 ICs. The simulation sees no ground to complete.
Also, if you develop U13 yourself, the simulation is telling you that the ADC included in the MOD file sees no ground. Review the MOD file or design for U13 and check the ADC cct included for ground reference for the overall IC GND.
Let me know if this works. Good luck!