ChnAreaDel deleting wrong rows in a string channel

[JFiddie]

I am trying to write a script in DIAdem 2010 SP1 to delete the first row of a group that contains two string channels and one time channel, but the

wrong data is being deleted from the string channels.

I start with a file that contains a group like this:

I run this code expecting the first row to be deleted

Dim logGroup
	Set logGroup = Data.Root.ChannelGroups("Log")

	Call ChnAreaDel(logGroup.Channels("Name"),1,1)
	Call ChnAreaDel(logGroup.Channels("ID"),1,1)
	Call ChnAreaDel(logGroup.Channels("Timestamp"),1,1)

but end up with this:

The first row of the Timestamp channel is deleted, but the Name and ID channels get their last rows deleted.

I have played around a bit and it seems to me that for a string channel ChnAreaDel only deletes from the last row.

Is there another function I should use? 

Any help would be appreciated. 

Thank You,

Joe

[Brad_Turpin · Accepted solution]

Hi Joe,

I've reproduced that ChnAreaDel()  bug you reported in both DIAdem 2010 and 2011-- really odd.  In the meantime, you can use this older approach that uses a string parameter to point to the channel collection to remove the row(s) from:

Set logGroup = Data.Root.ChannelGroups("Noise data results")
ChnStr = ""
FOR Each Channel In logGroup.Channels
  ChnStr = ChnStrAdd(ChnStr, Channel.Properties("Number").Value)
NEXT
Call DataBlDel(ChnStr, 1, 1)

Brad Turpin

DIAdem Product Support Engineer

National Instruments

[JFiddie]

Thank you Brad,

Your alternative worked like a charm.

I had came across the DataBlDel command in Help, but the last note says that you cannot perform block operations on text channels, so I didn't try it.

-Joe