Failed to load DLL IEFCMN, reason code 126

Document ID : KB000110651
Last Modified Date : 10/08/2018
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Client Manager (CM) will not start correctly after upgrade.
Windows 7, Windows 10
We are using own Install shield and after upgrade and start Client Manager (CM) failed with error 'Failed to load DLL IEFCMN, reason code 126. When I send test transaction, it works OK but displays the message "Message load failure, id = 16034, error 1813" 

1-check the PATH settings in WINDOWS>Enviroment settings
2-is your CM deployment directory in the system path? 
3-check your iefcmn.ini file 
4-check the path of MSGDLLNAME is set to

correct all the PATH settings will solve this, in this case it was the incorrect path of MSDLLNAME
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