Tapan,
Our network security team provide me two file, one is .txt with key and .pfx file, they told me to import to webdispatcher. what i have done is i created .pse and cert file in sapwebdisp with below command.
"Sapgenpse.exe gen_pse -p SAPSSLS.pse -x PIN -r SAPSSLS.req", then
i tried to import the certificate with the command
"Sapgenpse import_own_cert -c SAPSSLS.p7b -p SAPSSLS.pse -x PIN"
for SAPSSLS.p7b, i given the path for the key provided by my network team. while executing am getting the only above error.