We have develped our VIRDI integration plug in with Milestone XP MIP SDK 2017 R1 (11.1). However, frequently showing message from access control tab with ‘Error: Object reference not set to an instance of an object’ It is happening only to certain computer. Could you let me know why it is creating this error message? I am attaching related log during the problem. @IT Milestone (Milestone Systems) , @Milestone Developer @Webmaster Milestone (Milestone Systems)
Port 1237 is exposed by the Enterprise recording service, and used by the Event Server to get states and changes. Looks like this service is not running or there is some confusion around IP addresses. Some log messages has 127.0.0.1 and some have a real address.
Try see if you replace any “localhost” definition with a real IP address or computer name.
If you change the machines domain, you might also get into troubble - keep the machine on same network as you installed it.
I dont see any NullReference exceptions anywhere?