i4SCADA BACnet connector shows error message "Invalid URL, the URL is too long"

Symptom:

• i4SCADA is configured to use the i4BACnet connector
• The i4SCADA server starts properly with approx. 300 BACnet items 
• Starting the i4SCADA server with approx. 350+ items will cause an error message in ActivityAnalyzer "Invalid URL, the URL is too long"

Root Cause:

The “WEBSocket protocol” option is not activated in the IIS (Internet Information Service). As a result, the BACnet communication runs in a fallback mechanism, which limits the number of characters in the URL.

Solution:

Activate the "WEBSocketProtocol" option in IIS.