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I'm new to PSS/E. And I want to run dynamic simulation in PSS/E. But encounter some problems when running PSS/E from python/. Here's the error from PSS/E when I try to open .py file in PSS/E:

Traceback (most recent call last): File "C:\Users\Cynthia\Desktop\0312.py", line 11, in <module> redirect.psse2py() File ".\redirect.py", line 147, in psse2py redirect.RedirectError: Python currently sending output to Psse Couldn't open Python file:C:\Users\Cynthia\Desktop\0312.py

And here's my code:

import os,sys

PYTHONPATH = r'C:\Program Files (x86)\PTI\PSSEXplore34\PSSPY27'
sys.path.append(PYTHONPATH)
os.environ['PATH'] += ';' + PYTHONPATH

import psspy
import redirect

# Redirect output from PSSE to Python:
redirect.psse2py()

# Last case:
CASE = r"C:\Program Files (x86)\PTI\PSSEXplore34\EXAMPLE\savnw.sav"
psspy.psseinit(12000)
psspy.case(CASE)

# Convert loads (3 step process):
psspy.conl(-1,1,1)
psspy.conl(-1,1,2,[0,0],[100,0,0,100])
psspy.conl(-1,1,3)

# Convert generators:
psspy.cong()

# Solve for dynamics
psspy.ordr()
psspy.fact()
psspy.tysl()

# Save converted case
case_root = os.path.splitext(CASE)[0]
psspy.save(case_root + "_C.sav")

# Add dynamics data
psspy.dyre_new(dyrefile="C:\Program Files (x86)\PTI\PSSEXplore34\EXAMPLE\savnw.dyr")

# Add channels by subsystem
#   BUS VOLTAGE
psspy.chsb(sid=0,all=1, status=[-1,-1,-1,1,13,0])

# Save snapshot
psspy.snap(sfile="C:\Program Files (x86)\PTI\PSSE32\EXAMPLE\python_test.snp")

# Initialize
psspy.strt(outfile="C:\Program Files (x86)\PTI\PSSE32\EXAMPLE\python_test_1.out")
psspy.run(tpause=1)

# 3-phase fault on bus 201 (default bus fault is a 3phase and there is no bus 200)
psspy.dist_bus_fault(ibus=201)

# Run to 3 cycles
time = 3.0/60.0 + 1
psspy.run(tpause=time)

# Clear fault (assuming only part of bus faults)
psspy.dist_clear_fault()
psspy.dist_branch_trip(ibus=201, jbus=151, id='1')

# Run to 20 seconds
time = 10

Thanks a lot for your help!!!