Hi Martychi,
You should not need the registry entry if you are using a recent PSpice version like SPB 16.3 or SPB 16.5
In previous versions, the installer used to create this entry.
If you want to create the entry manually, create the following keys:
Under HKEY_LOCAL_MACHINE\SOFTWARE\Cadence Design Systems - Create key "Interchange"
Under Interchange - Create "<release name>" e.g. create key 16.3.0 for 16.3, 16.5.0 for 16.5, 15.7.0 for 15.7 etc.
Under <release>, create "ProductConfiguration"
Under ProductConfiguration, create "Shared"
Under Shared, create String Value with Name = "PSpiceConfigFile" and Value = "<path to ini file>"
e.g. path may be D:\cadence\SPB_16.5\tools\pspice\pspice.ini
Please let me know if it helps.
Regards,
Abha