If this CU is selected, but no event items are configured, I get the following error(s):

Not enough event trigger node items configured.
Read.Response.ResponseHeader.ServiceResult is Bad: BadNothingToDo (0x800f0000)
called from: D:/OPC/OPCToolboxV5/trunk/Test/CTT_1.4.9.395/CppTestServer/library/ClassBased/UaR.js line: 201
called from: D:/OPC/OPCToolboxV5/trunk/Test/CTT_1.4.9.395/CppTestServer/library/ServiceBased/AttributeServiceSet/Read.js line: 129
called from: D:/OPC/OPCToolboxV5/trunk/Test/CTT_1.4.9.395/CppTestServer/library/ServiceBased/AttributeServiceSet/Read.js line: 67
called from: D:/OPC/OPCToolboxV5/trunk/Test/CTT_1.4.9.395/CppTestServer/maintree/Address Space Model/Address Space Events/Test Cases/initialize.js line: 18

The "Initialize" script DOES stop the CU, but does not stop itself.

Most likely it would be better if it would read like
if (!isDefined(eventTriggerItems) || eventTriggerItems.length === 0) {
addSkipped("Not enough event trigger node items configured."); stopCurrentUnit();
} else {
....
}