fixed it.
I have installed putty session manager (Version 0.50.189.0) recently and have configured the application with pointing to exe path for (putty, psftp, pageant, winscp and conEmu with "Enable ConEmu Support"). Now when I open my first session it opens very well with ConEmu, now if I try to open the second session it gives me an error. Why am i getting the error? Please refer the attached screenshot for more details of what I am receiving. Kindly suggest.