Applies To:
  • CitectSCADA 5.50, 5.50 Service Pack A, 5.50 Service Pack B, 5.50 Service Pack C, 6.00, 6.00 Service Pack A
  • CitectHMI 5.50, 5.50 Service Pack A, 5.50 Service Pack B, 5.50 Service Pack C, 6.00, 6.00 Service Pack A
Summary:
According to the help “you can set up multiple ‘virtual’ modems in Windows with different settings that use a single COM port. This is useful for dialled devices when you only have one COM port or only wish to use one modem and the devices use different communication settings. This configuration can cause a handle leak that will eventually result in a crash. 
 

Solution:
This problem has been fixed in version 6.10. 
Keywords:
scheduled i/o dialup dialin dialout single  

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