Applies To:
  • CitectSCADA 6.XX
  • CitectHMI 6.XX

When loading a Process Analyst View (.PAV) file with a large number of trend pens I can see a hardware alarm that states "Object event queue flooded". If I reduce the number of trend pens in the .PAV to a smaller value and reload it the hardware alarm does appear.

This error message is similar to "out of cicode threads".  Every ActiveX event (Process Analyst is an ActiveX control) uses a cicode thread until it is processed, and this may cause Citect to run out of cicode threads.  Increasing the number of cicode threads via the [CODE]Threads is a quick solution to this.

Process Analyst, PAV, hardware alarm, object event queue flooded