In some rare cases the error "String index out of range: -128" is shown in the client's browser when calling ITP/OnLine Server. Most likely this error is caused by the computer name of the server being too long.
The NetBIOS name of a computer is limited to 15 bytes. If the computer name of machine has a name longer than 15 characters, the NetBIOS name will be truncated. This causes a mismatch between computer name and NetBIOS name.
ITP/OnLine Server internally uses both the machine name and the NetBIOS name of the server running ITP/OnLine. If due to the name limit of the NetBIOS name a mismatch occurs, the error "String index out of range: -128" is generated.
As a solution the machine name must be changed to a shorter name that matches the NetBIOS requirements.