UNABLE TO START SWITCH -ERROR CODE 40

Hi dear, what is your eNSP version? And your OS? Is w10?

maybe need reinstall it...

Hello!

Can you try the steps given in the below post and tell me the result?

 
https://forum.huawei.com/enterprise/en/Reading-or-changing-the-Virtual-Machine-in-eNSP-possible-solution-to-error-code-40/thread/477189-865

try to reinstall

I had the same problem, but the cause was the Windows Update that i did. To solve the problem i switched back my notebook to last Windows version before the update and reinstalled eNSP from zero! I had to search through the folders and delete every eNSP data that wasn't excluded when i uninstalled the program. Also, i had to reset the firewall back to default in order to remove the eNSP polices. Only after doing this i finally put eNSP to work fine again.