I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:

Self:Delete()

I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!

Any ideas...thank you,

David

Whats pahhens when you do a lokc() before the delete()
John

Op 19-1-2023 om 19:44 schreef David Linda:
> I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
>
> Self:Delete()
>
> I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
>
> Any ideas...thank you,
>
> David

Most likely you are calling the method in a **recursive loop**.

Need better help?

Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
with all related files, which duplicates the issue.

I suggest you always provide the VO version, Window version, etc.

Also, if a post helps you, then say so. It's a good for others to see if
the issue is resolved in case they run into the same problem.

Jamal

On 1/19/2023 1:44 PM, David Linda wrote:
> I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
>
> Self:Delete()
>
> I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
>
> Any ideas...thank you,
>
> David

On Thursday, January 19, 2023 at 10:41:16 PM UTC-5, Jamal wrote:
> Most likely you are calling the method in a **recursive loop**.
>
> Need better help?
>
> Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
> with all related files, which duplicates the issue.
>
> I suggest you always provide the VO version, Window version, etc.
>
> Also, if a post helps you, then say so. It's a good for others to see if
> the issue is resolved in case they run into the same problem.
>
>
> Jamal
> On 1/19/2023 1:44 PM, David Linda wrote:
> > I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
> >
> > Self:Delete()
> >
> > I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
> >
> > Any ideas...thank you,
> >
> > David

I have a Delete button that contains this code:

Self:Delete()

I am using Virtalbox
windows 3.1
V.O. 1.0

David,
Is the method that contains this code also called Delete ?
In that case:
- you do not need that method at all
- or you change the code to SUPER:Delete()

Robert

> On Thursday, January 19, 2023 at 10:41:16 PM UTC-5, Jamal wrote:
> > Most likely you are calling the method in a **recursive loop**.
> >
> > Need better help?
> >
> > Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
> > with all related files, which duplicates the issue.
> >
> > I suggest you always provide the VO version, Window version, etc.
> >
> > Also, if a post helps you, then say so. It's a good for others to see if
> > the issue is resolved in case they run into the same problem.
> >
> >
> > Jamal
> > On 1/19/2023 1:44 PM, David Linda wrote:
> > > I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
> > >
> > > Self:Delete()
> > >
> > > I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
> > >
> > > Any ideas...thank you,
> > >
> > > David
> I have a Delete button that contains this code:
>
> Self:Delete()
>
> I am using Virtalbox
> windows 3.1
> V.O. 1.0

On Friday, January 20, 2023 at 11:00:21 AM UTC-5, Robert van der Hulst wrote:
> David,
> Is the method that contains this code also called Delete ?
> In that case:
> - you do not need that method at all
> - or you change the code to SUPER:Delete()
>
> Robert
> > On Thursday, January 19, 2023 at 10:41:16 PM UTC-5, Jamal wrote:
> > > Most likely you are calling the method in a **recursive loop**.
> > >
> > > Need better help?
> > >
> > > Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
> > > with all related files, which duplicates the issue.
> > >
> > > I suggest you always provide the VO version, Window version, etc.
> > >
> > > Also, if a post helps you, then say so. It's a good for others to see if
> > > the issue is resolved in case they run into the same problem.
> > >
> > >
> > > Jamal
> > > On 1/19/2023 1:44 PM, David Linda wrote:
> > > > I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
> > > >
> > > > Self:Delete()
> > > >
> > > > I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
> > > >
> > > > Any ideas...thank you,
> > > >
> > > > David
> > I have a Delete button that contains this code:
> >
> > Self:Delete()
> >
> > I am using Virtalbox
> > windows 3.1
> > V.O. 1.0

Holy Crap!

Robert it worked, But I don't understand...Self is my datawindow, super gets me to the app level, as I under stand this, which is why I don't understand. A more detailed explanation would be GREATLY appreciated.

Many thanks,

David

David,

You are confusing SUPER with OWNER

SUPER is the DataWindow class from which your class inherits.
OWNER is the Shellwindow class (if your window is inside a shellwindow)

Robert

> On Friday, January 20, 2023 at 11:00:21 AM UTC-5, Robert van der Hulst wrote:
> > David,
> > Is the method that contains this code also called Delete ?
> > In that case:
> > - you do not need that method at all
> > - or you change the code to SUPER:Delete()
> >
> > Robert
> > > On Thursday, January 19, 2023 at 10:41:16 PM UTC-5, Jamal wrote:
> > > > Most likely you are calling the method in a **recursive loop**.
> > > >
> > > > Need better help?
> > > >
> > > > Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
> > > > with all related files, which duplicates the issue.
> > > >
> > > > I suggest you always provide the VO version, Window version, etc.
> > > >
> > > > Also, if a post helps you, then say so. It's a good for others to see if
> > > > the issue is resolved in case they run into the same problem.
> > > >
> > > >
> > > > Jamal
> > > > On 1/19/2023 1:44 PM, David Linda wrote:
> > > > > I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
> > > > >
> > > > > Self:Delete()
> > > > >
> > > > > I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
> > > > >
> > > > > Any ideas...thank you,
> > > > >
> > > > > David
> > > I have a Delete button that contains this code:
> > >
> > > Self:Delete()
> > >
> > > I am using Virtalbox
> > > windows 3.1
> > > V.O. 1.0
> Holy Crap!
>
> Robert it worked, But I don't understand...Self is my datawindow, super gets me to the app level, as I under stand this, which is why I don't understand. A more detailed explanation would be GREATLY appreciated.
>
> Many thanks,
>
> David

On Friday, January 20, 2023 at 11:53:58 AM UTC-5, Robert van der Hulst wrote:
> David,
>
> You are confusing SUPER with OWNER
>
> SUPER is the DataWindow class from which your class inherits.
> OWNER is the Shellwindow class (if your window is inside a shellwindow)
>
> Robert
> > On Friday, January 20, 2023 at 11:00:21 AM UTC-5, Robert van der Hulst wrote:
> > > David,
> > > Is the method that contains this code also called Delete ?
> > > In that case:
> > > - you do not need that method at all
> > > - or you change the code to SUPER:Delete()
> > >
> > > Robert
> > > > On Thursday, January 19, 2023 at 10:41:16 PM UTC-5, Jamal wrote:
> > > > > Most likely you are calling the method in a **recursive loop**.
> > > > >
> > > > > Need better help?
> > > > >
> > > > > Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
> > > > > with all related files, which duplicates the issue.
> > > > >
> > > > > I suggest you always provide the VO version, Window version, etc.
> > > > >
> > > > > Also, if a post helps you, then say so. It's a good for others to see if
> > > > > the issue is resolved in case they run into the same problem.
> > > > >
> > > > >
> > > > > Jamal
> > > > > On 1/19/2023 1:44 PM, David Linda wrote:
> > > > > > I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
> > > > > >
> > > > > > Self:Delete()
> > > > > >
> > > > > > I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
> > > > > >
> > > > > > Any ideas...thank you,
> > > > > >
> > > > > > David
> > > > I have a Delete button that contains this code:
> > > >
> > > > Self:Delete()
> > > >
> > > > I am using Virtalbox
> > > > windows 3.1
> > > > V.O. 1.0
> > Holy Crap!
> >
> > Robert it worked, But I don't understand...Self is my datawindow, super gets me to the app level, as I under stand this, which is why I don't understand. A more detailed explanation would be GREATLY appreciated.
> >
> > Many thanks,
> >
> > David
Oh yes...So then similarly my add code should be IF super:Append() = TRUE instead of IF Self:Append() = TRUE which is what I have now
This was also confusing because Self:Append() worked and Self:Delete did not. Thanks again

Hi David,

> On Friday, January 20, 2023 at 11:53:58 AM UTC-5, Robert van der Hulst wrote:
>> David,
>>
>> You are confusing SUPER with OWNER
>>
>> SUPER is the DataWindow class from which your class inherits.
>> OWNER is the Shellwindow class (if your window is inside a shellwindow)
>>
>> Robert
>>> On Friday, January 20, 2023 at 11:00:21 AM UTC-5, Robert van der Hulst wrote:
>>>> David,
>>>> Is the method that contains this code also called Delete ?
>>>> In that case:
>>>> - you do not need that method at all
>>>> - or you change the code to SUPER:Delete()
>>>>
>>>> Robert
>>>>> On Thursday, January 19, 2023 at 10:41:16 PM UTC-5, Jamal wrote:
>>>>>> Most likely you are calling the method in a **recursive loop**.
>>>>>>
>>>>>> Need better help?
>>>>>>
>>>>>> Go the X# forum at www.xsharp.eu and upload and a complete minimal AEF,
>>>>>> with all related files, which duplicates the issue.
>>>>>>
>>>>>> I suggest you always provide the VO version, Window version, etc.
>>>>>>
>>>>>> Also, if a post helps you, then say so. It's a good for others to see if
>>>>>> the issue is resolved in case they run into the same problem.
>>>>>>
>>>>>>
>>>>>> Jamal
>>>>>> On 1/19/2023 1:44 PM, David Linda wrote:
>>>>>>> I find this error to be very curious, I have a data window. My intention is to create a basic add, edit, delete app and the code in my delete button contains the following code:
>>>>>>>
>>>>>>> Self:Delete()
>>>>>>>
>>>>>>> I get a processor stack error. While debugging I see the delete code execute over and over until I get the error. I don't understand why the code executes over nd over, and the delete never occurs!
>>>>>>>
>>>>>>> Any ideas...thank you,
>>>>>>>
>>>>>>> David
>>>>> I have a Delete button that contains this code:
>>>>>
>>>>> Self:Delete()
>>>>>
>>>>> I am using Virtalbox
>>>>> windows 3.1
>>>>> V.O. 1.0
>>> Holy Crap!
>>>
>>> Robert it worked, But I don't understand...Self is my datawindow, super gets me to the app level, as I under stand this, which is why I don't understand. A more detailed explanation would be GREATLY appreciated.
>>>
>>> Many thanks,
>>>
>>> David
> Oh yes...So then similarly my add code should be IF super:Append() = TRUE instead of IF Self:Append() = TRUE which is what I have now
> This was also confusing because Self:Append() worked and Self:Delete did not. Thanks again

The problem with the Delete() method was that you named the method that
was calling Delete(), also "Delete", something like that:

METHOD Delete() CLASS ...
SELF:Delete()

so that code in line 2 was calling the same method itself again and
again. Using SUPER instead of SELF, you tell the compiler that you want
to call the same named method that is called one level lower in the
class hierarchy, so there's no recursive call anymore.

It's the same with Append(), if you were calling it from a same named
method like this:

METHOD Append() CLASS ...
SELF:Delete() // recursive call

then you woudl have again the same problem.

Btw, are you really using VO 1.0 and Win 3.1 (in a virtual machine) as
you mentioned in one of your previous posts?

Chris

On Sat, 21 Jan 2023 10:45:40 +0200, Chris Pyrgas wrote:

>METHOD Append() CLASS ...
>SELF:Delete() // recursive call
>
>then you woudl have again the same problem.
FTR, Chris, this should be:

METHOD Append() CLASS ...
SELF:Append() // recursive call
>
Regards

Karl

Thanks Karl :)

On 22/01/2023 12:18, Karl Faller wrote:
> On Sat, 21 Jan 2023 10:45:40 +0200, Chris Pyrgas wrote:
>
>> METHOD Append() CLASS ...
>> SELF:Delete() // recursive call
>>
>> then you woudl have again the same problem.
> FTR, Chris, this should be:
>
> METHOD Append() CLASS ...
> SELF:Append() // recursive call
>>
> Regards
>
> Karl
>