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PSSE Small Signal Stability NEVA

Can anyone please help me with this. Why am i getting this while executing Eigen Value Analysis from the Dynamics tab?

There may have been an issue running Python file:C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py Executing Python file:C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py

Traceback (most recent call last): File "C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py", line 1351, in PssNeva_Main() File "C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py", line 136, in PssNeva_Main _get_netomac_path() # get netomac path, check installation File "C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py", line 320, in _get_netomac_path strInstallDir = _get_install_dir( "" ) File "C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py", line 275, in _get_install_dir strCurVer = _get_registry_string( "HKEY_CLASSES_ROOT", "SIANetomac.Application\CurVer", "" ) File "C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py", line 265, in _get_registry_string return strValue UnboundLocalError: local variable 'strValue' referenced before assignment

There may have been an issue running Python file:C:\Program Files (x86)\PTI\PSSE34\PSSBIN\pssneva.py