用COMSOL 4.0 算液体击穿中流注发展出现的问题，求高人帮助解析

lsm2001

Failed to find consistent initial values.
Singular matrix
There are 1964 void equations (empty rows in matrix) for the variable mod1.En
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 void equations (empty rows in matrix) for the variable mod1.En2
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 void equations (empty rows in matrix) for the variable mod1.En3
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 void equations (empty rows in matrix) for the variable mod1.Ne
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 void equations (empty rows in matrix) for the variable mod1.Ne2
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 void equations (empty rows in matrix) for the variable mod1.Ne3
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 degrees of freedom that do not occur in any equation (empty columns in matrix) for the variable mod1.En
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 degrees of freedom that do not occur in any equation (empty columns in matrix) for the variable mod1.En2
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...
There are 1964 degrees of freedom that do not occur in any equation (empty columns in matrix) for the variable mod1.En3
at coordinates: (0,0), (0,0.0001), (6.48062e-005,6.76668e-005), (0.0001,0), (0,0.0002), ...