Search if Channels Exist

[rlbodor]

Running a script over many different versions of data logged, and the problem I'm having is finding channel names.  I run a report after crunching the data, but what happens is for instance in an older version I have a channel named

"Exhaust_Press"
and in the newer version I have a new channel named

"Exhaust_Press_Est" 

I want to determine if a channel doesn't exist, then use a different channel, if no channels exist of the type I want then to make a default channel.  Something like:

if isexist("Exhaust_Press") = 1 then

%process data

else if isexist("Exhaust_Press_Est") = 1 then

%process data

else

Exhaust_Press = ones(1:100)

end

Anybody have a clue how to do this in DIADem??

[Matthew.cf828br]

Have you tried the CNo function? If a channel exists I believe it returns a value >=1 depending on its position in the dataportal else it returns 0.

Hope that helps.

Matthew

[Tenanio]

If Data.Root.ChannelGroups("GroupName").Channels.Exists("ChannelName") Then
  'Process data
End If

 You can use Channels.Exists("ChannelName") to test if a channel is in a channel group but Matthews answer is better if you want to know if a channel exists in the dataportal.

If CNo("ChannelName") > 0 Then 
  'Process data
End If