ifDollarDefined() and RootPanelOnModule generates Warnings

[moto3101]

Hello together,

In the init of the panel, we are using ifDollarDefined("$foo"), still we are getting warnings about missing $ parameters when loading this panel in a module.

I just wanted to know if there is a way to prevent WinCC OA from generating these warnings when loading panels on modules without providing the respective dollar parameters in the rootPanelOnModule method.

Thanks and with best regards,
moTo

[fmulder]

You probably have something like this in your code:

Code: Select all

string strFoo = $foo;

I've also seen messages like you say when you define the variable as a panel global variable in your Scopelib.

* Do not define the variable with the $ in your scopelib
* Define the variable in your EventInitialize (with or without isDollarDefined)

The better way to do this is, which will keep away the error message is:

Code: Select all

string strFoo;

if( isDollarDefined( "$Foo" ))
{
  strFoo = $Foo;
}

p.s.
I often use this trick to test my panels. When I make an icon then I make sure that it runs with a dollar code or without a dollar code.

Example:

Code: Select all

string strDatapoint = "MYVALVE";  // Use a default datapoint for testing

// This icon can be used with or without the dollar code
if( isDollarDefined( "$datapoint" ))
{
  strDatapoint = $Datapoint;
}

Hope this helps

share the fun
Frenk Mulder

[moto3101]

Hello Frenk,

thanks for your reply.

You probably have something like this in your code:

Code: Select all

string strFoo = $foo;

No we don't, that's the thing that confuses me. We are defining the variable in the scope lib:

Code: Select all

string strDatapoint = "";

and in the init we have

Code: Select all

if( isDollarDefined( "$dp" ))
{
  strDatapoint = $dp;
}

Still, when loading a panel in a module without providing the dp parameters we get the error.

Code: Select all

RootPanelOnModule("Folder/panel.pnl","Foo","BarModule",makeDynString();

CTRL, WARNING, 51, Parameter incorrect, did not find the $-parameter, $dp
PARAM,WARNING, 81, Syntax error, $-Parameter, Module: BarModule

If we are using

Code: Select all

RootPanelOnModule("Folder/panel.pnl","Foo","BarModule",makeDynString($dp:);

the error vanishes.

Personally, I don't see the point in throwing errors if we are checking if the parameter is defined.

Best regards,
moTo

[fmulder]

We do 'string strDP' in the scopelib.
We assign the dollar code in the EventInitialize.

Do not mention "$DP" in the scopelib.

We had the same issue. Our rule now is : no $ codes in the scopelib

Good luck

Frenk Mulder

[moto3101]

Hi Frenk,

its not in the scope lib. Its in the EventInitialize of the panel, as mentioned above.

Best regards,
moTo

[mkoller]

Are we talking about an issue with $-parameters throwing warnings when using XML Panel files, which has been solved in 3.15 P8 ?

[moto3101]

Dear Martin,

we are using .pnl files. However, we are not using 3.15 but 3.14.

Best regards,
moTo