How do I construct a ChannelList/ElementList for use in the CALCYChn arg of the ChnNovHandle function?

[jack__]

I'm trying to maximize the speed of my script that has to separate a contiguous group into multiple groups based on a "cycle counter" channel:

dim sFormula, aSymbols, aValues 
redim aSymbols(4), aValues(4) 
aSymbols(0) = "a" 
aSymbols(1) = "b" 
aSymbols(2) = "c" 
aSymbols(3) = "d" 
aValues(2) = sGroupPattern & "/numCyclesCompleted"
dim intLoop, chnCount, chnIdx
dim oChns

for i = 0 to cycleMax

  sNewGrpName = "Cycle " & i
  set oNewGrp = CreateNewGroup(sNewGrpName)
  oNewGrp.Activate

  sFormula = "Ch(a) = Ch(b) + CTNV(Ch(c) <> d)"
  
  aValues(3) = i
  call LoopInit()
  chnCount = data.Root.ChannelGroups(sGroupPattern).Channels.Count
  chnIdx = 0
  call msglinedisp("Processing Cycle " & i)
  
  set oChns = data.CreateElementList
  
  for each oChn in data.Root.ChannelGroups(sGroupPattern).Channels
    chnIdx = chnIdx + 1
    LoopInc(int((chnIdx/chnCount) * 100))
    set oNewChn = oNewGrp.Channels.AddChannel(oChn)
    if oNewChn.Name <> "DateTime" then
      oChns.Add(oNewChn)
    end if
  next
  
  aValues(0) = oNewGrp.Name & "/DateTime"
  aValues(1) = sGroupPattern & "/DateTime"
  call calculate(sFormula, aSymbols, aValues)
  call ChnNovHandle(oNewGrp.Name & "/DateTime",oChns,"Delete","XY",true,true)
  
  call LoopDeInit()
  
next

However,. the ChnNovHandle() call is not doing anything to the channels in each cycle group, only the DateTime channel.  I have checked the size and contents of the oChns ElementList object, and it has formed how I expect.  ChnNovHandle() says that the CALCYChn argument can take a "ChannelList Variable", and goes on to explain that a Channel List object fits this bill, which is returned from Data.CreateElementList as an ElementList.

Am I missing something simple?  I've searched around the help docs for quite a while and I can't seem to figure out where I'm going wrong.  My alternative to the above is to use CTNV and ChnNovHandle on every channel, but that is many, many times slower than doing each only once per group, since my groups contain >250 channels apiece.

[Brad_Turpin]

Hi jack,

The second to last parameter in the ChnNovHandle() function needs to be FALSE, not TRUE.  Otherwise I don't see anything wrong with your code.

Brad Turpin

DIAdem Product Support Engineer

National Instruments

[jack__]

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 The second to last parameter in the ChnNovHandle() function needs to be FALSE, not TRUE.  

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That... would make a lot of sense, since that's the single/multiple channel flag...

Whoops.  Thank you!  I'll give that a shot and mark your post as a solution if that proves to be where I made the mistake.