I you found this problem when try to enable SNMP refereinf a libxml2.dll missing
When command is send:
C:\Program Files (x86)\VMware\VMware vSphere CLI\bin>vicfg-snmp.pl --server A.B.C.D --username myUser --password myPass -c community_name
SOLUTION: Reboot system (PC with Windows 8)
Missing DLL error during first command execution after installation (Windows). A vSphere SDK for Perl installation on Windows completes successfully. However, when you later run a script, errors about missing DLLs might result. For example:
libxml2.dll wasn't found
Workaround: Reboot your Windows system.
The command will travel and be accepted without problems :P