PSSE如何实现小干扰稳定分析？

song222

做小干扰稳定分析时，提示如下内容该如何解决？
. f! Q+ ^( }- q- \5 A7 k" X- ^6 jTraceback (most recent call last):
  File ".\pssneva.py", line 760, in <module>
0 y5 J3 a) k5 g* \3 U+ y0 f& t) s  File ".\pssneva.py", line 85, in _get_netomac_path
6 `% H& r# T8 y6 k4 T. R: gAttributeError: 'module' object has no attribute 'exist'
Couldn't open Python file:C:\Program Files (x86)\PTI\PSSE31\PSSBIN\pssneva.pyc
No such file or directory
Executing Python file:C:\Program Files (x86)\PTI\PSSE31\PSSBIN\pssneva.pyc
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