"Variable not found" Error. Need Help!

[Easy Rider]

I have a numeric (decimal) session variable, text box on a Web Dialog. I'm using it in a "Calculate" AdvancedButton that adds up the values of some of the controls. Why am I getting the following error?

"Error in event handler code for OnClick event for 'Calculate': Variable "PSALevel" not found."

I used the same technique on a different Dialog, and it worked there. I even deleted the control and put it back with no improvement.

Help! Please!

[Steve Wood]

Re: "Variable not found" Error. Need Help!

In most of your posts you provide too little information to go on.

There is no such thing as a "numeric" session variable. All session variables are character. If your session variable is named session.PSALevel, then the reason your dialog can't find it is because it is named session.PSALevel, not PSALevel.

[Pat Bremkamp]

Re: "Variable not found" Error. Need Help!

Actually, Steve, you can have a numeric session variable. I'm using numeric session variables in an application I'm working on right now.

I think the confustion comes from assigning session variables from the fields on a grid or a dialog (which are character even though they are formatted to look numeric). In that case, they are character.

However, if you assign a numeric value to a session variable with Xbasic, or assign it from a numeric table value, then it is numeric.

Pat

[Easy Rider]

Re: "Variable not found" Error. Need Help!

Thanx for your help Folks:

When I changed the variable names I got a different error:

"Argument is incorrect data type"

Here is the code:
(Suicied and interest are Radio Buttons with values: 0, 1, 2, 3)
DScore is a Label

dim S as n
dim I as n
S = session.Suicide
I = session.Interest

DScore = S + I

[Pat Bremkamp]

Re: "Variable not found" Error. Need Help!

I need to be more clear.

Values in the fields on a web component like a dialog are, like Steve said, character value. If you created the session variables by changing the scope of the radio button field variables to session, then you have character values. So, the formula should be
S = val(session.Suicide)
I = val(session.Interest)
DScore = str(S + I,2,0)

However, if you leave the scope as local, then you can use
session.Suicide=val(currentform.controls.suicide.value)
session.Interest=val(currentform.controls.interest.value)
DScore = str(session.Suicide+session.Interest,2,0)

Pat

[Easy Rider]

Re: "Variable not found" Error. Need Help!

I copied your code into my event script and got a different error:

"Error in event handler code for OnClick event for 'Calculate': Property not found
session.Suicide subelement not found. "

[Steve Wood]

Re: "Variable not found" Error. Need Help!

Pat - OK, seems true. But you know I had to test it!:) The code below produces this output. It seems agnostic about quoting the value:

as n wo quotes: 100.1 (N)
as n w/quotes: 100.1 (N)
as c wo/quotes: 100.1 (C)
as c w/quotes: 100.10 (C)

delete session.num
dim session.num as n
session.num = 100.10
?"as n wo/quotes: " + session.num + " (" + typeof(session.num) + ")"

? "<br>"

delete session.num
dim session.num as n
session.num = "100.10"
?"as n w/quotes: " + session.num + " (" + typeof(session.num) + ")"

? "<br>"

delete session.num
dim session.num as c
session.num = 100.10
?"as c wo/quotes: " + session.num + " (" + typeof(session.num) + ")"

? "<br>"

delete session.num
dim session.num as c
session.num = "100.10"
?"as c w/quotes: " + session.num + " (" + typeof(session.num) + ")"

[Steve Wood]

Re: "Variable not found" Error. Need Help!

EZ,

It's simply means that session.Suicide does not exist at the moment the button is clicked.

You have to ensure that variable has a value when it is needed. When writing code, for safety sake, you also must assume that it DOES NOT exist when needed. Example:

if eval_valid("session.suicide") .and. eval_valid("session.interest")
S = val(session.Suicide)
I = val(session.Interest)
DScore = str(S + I,2,0)
else
?"Sorry, we are missing values"
end if


This still does not guarantee those variables have a value, the eval_valid() means they "exist" but they still could be null values.

[Easy Rider]

Re: "Variable not found" Error. Need Help!

Steve:

How could these variables NOT exist? They are controls in the dialog component, and I'm filling them in before clicking the "Calculate" button.

Another anomaly:
A simple calculation, in another dialog, works fine, in a "Live Preview" or a "Browser" test, of the dialog component alone, but it stops working, when I Publish the page it is on, to the Webroot.

This is my first Alpha project, and I'm very confused! I appreciate your help.

Thanx,
EZ Rider

[gobbligook]

Re: "Variable not found" Error. Need Help!

You may need to make sure you are publishing all of the changed files. I've sometimes had some trouble thinking I've made a change and the published location not reflecting that change because of this. In the publish dialogue you can specify to publish all files, not just the current one.

[Easy Rider]

Re: "Variable not found" Error. Need Help!

Gobbligook:

I have been publishing all files to the Webroot each time, but it makes no difference. I just tried it again now.
Thanx for the suggestion, though.

EZ Rider

[Steve Wood]

Re: "Variable not found" Error. Need Help!

How could these variables NOT exist? They are controls in the dialog component, and I'm filling them in before clicking the "Calculate" button.

That's actually not true. The form is not submitted when you click your AdvancedButton, so the session variables defined by your controls are never created or populated.

If you put your same forumla in the AfterValidate Event, those variables would exist and be populated.

I can't figure out why you want them to be session variables anyway. If the calculation is taking place in the same dialog, just refer to the field controls using the standard reference - currentform.controls.myfield.value.

I have NEVER defined a dialog control as scope=session in all the apps I have built.

[Easy Rider]

Re: "Variable not found" Error. Need Help!

Ooooh! So I have to submit the screen before the variables exist. I'll try that.

I made all the controls session variables because I wanted to refer to some of them, in the calculations made in other dialogs.

If I assign a value to a session variable, in one dialog, how can I put that value on the screen or use it in a calculation, in another dialog of the same session?

Thanx for your help,
EZ Rider

[Pat Bremkamp]

Re: "Variable not found" Error. Need Help!

I can underestand your frustration, so let's try one more time

You are using dialogs, right?

So, in the dialog your calculation is in, set the scope of all the controls to "local".

When you fill in the value in the control, the value exists, and you can refer to it with currentform.contols.whatever.value which will give you a character value.

Now, if you have two of those, Suicide and Interest, and want to do math with them, you have two choices. If all you want to do is display the calculation, then you can define the DScore field as a textbox and put in a calculated Field Expression (that's in the Control Settings Prooperty sheet) of val(Suicide)+val(Interest). I've found that the dialog is smart enough to convert this formula back to string, but you can also do the conversion yourself to be safe.

Now, if you want to let the user override the value in the DScore field, instead you can fill the value in the control using your advanced button with the script
S = val(currentform.contols.Suicide.value)
I = val(currentform.controls.Interest.value)
currentform.controls.DScore.value = str(S + I,2,0)

Now if you want to use those values in another dialog in the same session, add the follwing script below the one just above

session.Suicide=currentform.controls.Suicide.value
session.Interest=currentform.controls.Interest.value
session.DScore=currentform.controls.DScore.value

That creates the session variables as character values

Now, in the dialog you want to use them in, put this in the initialize event

if eval_valid("session.Suicide")=.t.
currentform.controls.whateverfieldname.value = session.Suicide
else
what to do if it doesn't exist
end if

The whatever field name value is now properly a character value

same for the other two.

Pat