WinCC V5.1 HF2 Eating Memory

[Guest Rusty_K]

Hello, I'm running WinCC V5.1 HF2 and I've noticed that in my task manager, the program script.exe (which I believe is the WinCC script runtime engine) seems to be using more and more memory the longer WinCC remains in runtime. I have several global scripts running and I am also using a fair amount of string variables but I only allocate the necessary number of character spaces +1 . I have also implemented self-made DLLs (created in Visual Stuido 6 C++) and have recently learned that they should be configured as "Release" instead of "Debug". I will be rebuilding them soon...is there more I should know about this? I would like to know if anyone has experienced anything remotely similar. The memory seems to increase even when I change pages in the SCADA. Is this an inherent problem with WinCC? Any help would be greatly appreciated. Cheers R.K.

[Guest Rookie]

I have had a similar issue with online Trending with WinCC v5.0 where two processes's related to WinCC memory usage increases dramatically overtime either causing the system to lockup or the HMI becomes very slow in performance, ex) switching screens. I have never found a root cause for the problem but I ended up ordering additional memory since the trending was an important tool for our process. I know this doesnt help but you are not alone.