Applies To:
  • CitectSCADA 5.xx
  • CitectHMI 5.xx
Summary:
OPC Driver Memory Leak. When ran the test for 4 hours and noticed that the 161 KB/hour leak  

Solution:
The problem only happens on connection attempt. If the connection fails and is repeatedly retried then the leak will grow over time. To be precise, CoCreateInstanceEx leaks roughly 100 bytes per call. This is a DCOM issue so there is nothing that can be done. We have searched MS KB for patches without success. 
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