Hi, I have a loop which runs until one of the tasks finishes. I try to make the chkSaveAOV and the chkSaveV equivalent and would use either of them. However, I found when I have only the chkSaveV box checked, the AOVInFlag changes to True at the ***** commend, which cause a problem for the loop. This happens even though I'm not doing anything with any of the "Save AOV" function.What is stranger, this doesn't happen the other way around. I mean, when I have only the chkSaveAOV box checked, the VInFlag wouldn't change during the run.Could you please look at my code and see what's wrong with it? Thanks a lot! If chkSaveAOV Then DAQmxErrChk DAQmxStartTask(AOVInHandle) If chkSaveV Then DAQmxErrChk DAQmxStartTask(VInHandle) Label13.Caption = "Total bins: " Do DAQmxErrChk DAQmxIsTaskDone(PhotBinHandle, BinFlag) BinFlag = Not BinFlag If chkSaveAOV Then DAQmxErrChk DAQmxIsTaskDone(AOVInHandle, AOVInFlag) AOVInFlag = Not AOVInFlag Else AOVInFlag = False End If If chkSaveV Then***** DAQmxErrChk DAQmxIsTaskDone(VInHandle, VInFlag) VInFlag = Not VInFlag Else VInFlag = False End If DoEvents Loop While (BinFlag Or AOVInFlag Or VInFlag) Best,Yan

Hi Yan, I have tried striping down your code to simply two analog input tasks with the chksave and chksaveAOV, but did not observe the behavior you are describing. Could you perhaps try doing the same and seeing if this problem persists. If you do not wish to troubleshoot the code, maybe we can make some modifications in the hopes of working around this problem. My recommendation is that since you will only be running one of the two input tasks at any given time, you can all task related functions such as creation, configuration, operation and cleanup in one large if statement rather than having multiple if statement checks for each stage. There must be something that we are overlooking, but I believe that this suggestion may help work around the problem, not mentioning the fact the code will also look a lot cleaner.

Measurement Studio for VB6

Unexpected flag change

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Hi Hong,

Thank you for your advice! I cleaned up the code and it works, although I still don't understand what mistake I made accidentally changed a irrelavent flag. I'll just try to write clean code in future...

Yan

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Measurement Studio for VB6

Unexpected flag change

Re: Unexpected flag change