ChnFind-Syntax

[FHM]

Hello,

I am using the search function "ChnFind" in Diadem version 10.2. My function call looks like this:

Dim StartIndex_Hin, MinWinkel

MinWinkel= CCh(Channel,1) ' Search the Minimumvalue in the channel

StartWinkelHin = MinWinkel + 10  ' MinValue + 10

StartIndex_Hin = ChnFind("Ch("&Channel&")>"StartWinkelHin"",0) ' finde the value (StartWinkelHin ) in the Channel

Unfortunately it doesnt work. I get the error that ")" is missing . . . .

When I use the function call:

StartIndex_Hin = ChnFind("Ch(""1/Winkel A"")>10",0)

Everything works good!!!

Can you tell me what am I doing wrong?

thanks for your help!

[Twigeater]

Hello FHM!

Assuming 'StartWinkelHin' is a VBS variable, DIAdem can not access it in ChnFind! One solution is to convert the value to the string reprsentation like this:

StartIndex_Hin = ChnFind("Ch("&Channel&")>" & str(StartWinkelHin),0) ' finde the value (StartWinkelHin ) in the Channel

Another approach is to use a DIAdem variable for the compare value like R1.

Matthias

[FHM]

Thank you for your quick reply. I test both of them but it didnt work. any another idea ?

[Twigeater]

Hello FHM!

I will add my complete code. In my test everything works fine!

Option Explicit
 
Dim StartIndex_Hin, MinWinkel
Dim Channel
Dim StartWinkelHin
 
Channel = 2
 
MinWinkel= CCh(Channel,1) ' Search the Minimumvalue in the channel
StartWinkelHin = MinWinkel + 10  ' MinValue + 10
 
StartIndex_Hin = ChnFind("Ch("&Channel&") > " & str(StartWinkelHin),0) ' finde the value (StartWinkelHin ) in the Channel
 
MsgBox StartIndex_Hin

Matthias

[FHM]

thanks for your reply. You are right it works fine as long you use "Channel=2" if you use "Channel="Test" " it wont work any more. The error tells that ")" is needed.

that was and is still the problem

[Twigeater]

Hello FHM!

If Channel is a string the code has to look like this:

Option Explicit
 
Dim StartIndex_Hin, MinWinkel
Dim Channel
Dim StartWinkelHin
 
Channel = "Test"
 
MinWinkel= CCh(Channel,1) ' Search the Minimumvalue in the channel
StartWinkelHin = MinWinkel + 10  ' MinValue + 10
 
StartIndex_Hin = ChnFind("Ch("""&Channel&""" ) > " & str(StartWinkelHin),0) ' finde the value (StartWinkelHin ) in the Channel
 
MsgBox StartIndex_Hin

Important are the additional double quotes! A good practice is to display the expression in the ChnFind with a Messagebox like this

There it is easier to see the syntax faults.

Call MsgBox("Ch("""&Channel&""" ) > " & str(StartWinkelHin))

Matthias

[FHM]

Thank you very much it works now!

[FuelCellWhisperer]

I would like to resurect this topic for one clarifiation.Is there a way to call out the GROUP using this method? I'm trying to do a very similar thing, except that I'm searching different channels in different groups.

Thanks in advance.

[Brad_Turpin]

Hi FCW,

Yes, you can add the Group syntax in several ways instead of your current Ch("ChannelName") syntax:

Ch("GroupName/ChannelName")

Ch("GroupName/[ChannelIndex]")

Ch("[GroupIndex]/ChannelName")

Ch("[GroupIndex]/[ChannelIndex]")

Brad Turpin

DIAdem Product Support Engineer

National Instruments