While doing rail analysis of a design, I got an error like this:
Beginning a steady-state analysis of the circuit.
Loading current source data file: .//VDD_25C_avg_6/VDD.tap
Total current loaded = 1A
Starting parallel solve with 1 thread(s)
Using 4 CPU(s) for matrix factorization
******vsdlss Error******
Status:9999
Version:3.2.0
vsdlss0035
vsdlss0035:Negative or zero pivot -2.432995e-07 at row 27. Stiffness matrix
failed to factor
Source File
factorchunkutils.h
Line:2305
******vsdlss Error******
*** Solver error: (level 9999)
*** vsdlss0035:Negative or zero pivot -2.432995e-07 at row 27.
Stiffness matrix failed to factor
Error: Matrix solve failed with error code 9999.
*** Error: In file /tmp/vstorm_28645.cmd at line number 27 :-
Solving the power grid failed.
What could be the possible reason for the error and how can I fix it?? Can anybody please help??