(Solution) Star C3 Pro java.lang.NullPointerException error
The system window pops out an error message “An error has com.daimler.wis.client.net.http.DefaultClientCommunicationHandler occurred in: java.lang.NullPointerException ” when using Star C3 Pro with seven cable T30 HDD EPC software.
NullPointerException is one of the common problems and is an Exception thrown by the JVM when you middleware or other parts of your software encounters the following conditions:
1) Try to invoke an instance method of a null object-
2) Try to access or modify a particular field of a null object-
3) Try to obtain the length of such null object as an array
The problem possibly lies on the wrong setting in Java Control Panel. Do as following:
Select "Perform certificate revocation checks on"
Select "Do not check (not recommended)"
Click OK to save setting