Thanks for Ben and Sean to help me solve the CPU problems. I tried different ways. The symptom still exists. It was intermettent. Occationally it might work fine.
I have the labview HMI as OPC client talking to Think&Do OPC server. I have a main screen,which has a few buttons to lead to other screens such as setup screen, control screen, maintenance screen. If I run the main screen after the first time I load the program in, the setup screen was able to run without a CPU problem, so was the maintenance screen. Once I went to the control screen, the CPU went to 100%, sometimes, it did not do it. Once the CPU was 100%, even I exit the control screen, the CPU usage was still 100%, even I stopped the main screen, and restart the main screen again, the CPU would stay 100%. I was skeptical about the memory alocation because sometimes it went fine. I will try to "comment out" the code to debug the program. Thanks. Kimberly
