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Hello,

If the value "oLbx:nAt" in a listbox, containing an array, gets a value which is higher then the length of the array, a bound array error occurs.

Is there no possibility to change the Twbrowse class in this way : when "oLbx:nAt" gets a value which is higher then the length of the array in the listbox, "oLbx:nAt" is automatically set to the length of the array. This would prevent the bound array error to occur.

My only problem : I know to little about classes to build this change.

Thank you very much in advance for any help.

Hi Driessen
oLbx: NAT should never exceed the length of the array, this data should be checked every time
is better than a user has control of the length of the array, so we'll know more assurance that the function is working properly,, (sorry my english)
regards

Willi,

Thank you for your answer.

My experience is otherwise though.

If you are positioned on the last line of the array, and you delete this line, then you always have to take care about oLbx:nAt because otherwise the bound error array occurs. To my opinion that should be checked in the class itself.

Driessen:

I agree with your suggestion. A behind the senes check by oLbx: NAT is an excellent idea.

If you are positioned on the last line of the array, and you delete this line, then you always have to take care about oLbx:nAt because otherwise the bound error array occurs. To my opinion that should be checked in the class itself.

Each time you remove an element of an array, you must control the length of the array, if it reaches zero (0), is added an element with empty data ... must use the Asize()
regards

Hi All,

We are also experiencing a bound array access error with TWBrowse FWH version 10.9 but it is hard to reproduce in our application.

The following are extracted from our error log.

20110602;13:25:33
(b)TRY@16
(b)STARTPCR@1590
(b)TWBROWSE@152
TWBROWSE:DRAWLINE@0
Alias PLU
PC/Register+(tm) 5.3-20110518 SN0000000001
Error BASE/1132 Bound error: array access Args: (A:{ ... }) (N:-3)

20110608;10:10:14
(b)TRY@16
(b)STARTPCR@1590
TWBROWSE:DRAWSELECT@464
TWBROWSE:LBUTTONDOWN@1216
Alias PLU
PC/Register+(tm) 5.3-20110518 SN0000000001
Error BASE/1132 Bound error: array access Args: (A:{ ... }) (N:0)

Is this a similar issue?

Do we have a solution or update to TWBrowse Class or any suggestions that may resolve this issue?

Thank you very much,

Jose

Division by Zero:
Actually we are also experiencing a division by zero error with TWBrowse. It is happening randomly when we access the application via Remote DeskTop.

20110602;13:48:12;(b)TRY@16
TWBROWSE:LBUTTONUP@1261
TCONTROL:HANDLEEVENT@1489
TWBROWSE:HANDLEEVENT@1656
Alias CLERK
PC/Register+(tm) 5.3-20110518 SN0000000001
Error BASE/1340 Zero divisor: / Args: (N:0) (N:0.00)

Any idea?

Thank you very much.

Jose

Error BASE/1132 Bound error: array access Args: (A:{ ... }) (N:-3)

Error BASE/1132 Bound error: array access Args: (A:{ ... }) (N:0)

Is this a similar issue?

Do we have a solution or update to TWBrowse Class or any suggestions that may resolve this issue?

hi driessen,
Willy say: oLbx: NAT should never exceed the length of the array.. and is correct, but if you delete the last record, then should be this action:
ADel( YourArray, oLbx:nAt )
ASize( YourArray, Len( YourArray ) - 1 )
oLbx:GoUp()
oLbx:Refresh()

works fine for me !!
regards
paco

Something else,,, every time you make a ASIZE, ADEL, must necessarily indicate a SetArray, example:

Adel (YourArray, oLbx NAT)
ASize (YourArray, Len (YourArray) - 1)
oLbx: SetArray (YourArray) <--------------- this is where the:: nAt is updated ..
oLbx: goup ()
oLbx: Refresh ()

Regards

driessen wrote:
If you are positioned on the last line of the array, and you delete this line...

James Bott wrote:
In the two examples you gave, N=-3 in one and N=0 in the other. I expect the problem is in your code. I'm not sure how you can get a -3 value for the row pointer. The 0 pointer probably means you have a empty array; either it was empty when the browse was initiated, or the user deleted all the records. Please check your code to make sure you are adjusting the array length value in the Browse (oLbx:nAt) when deleting and adding records. I don't know if wBrowse can handle an empty array or not--it should be easy to test.

Jose,

I expect the N is either nRow or ::nColPos. However, since the error is not easy to generate, it will be very hard to find.

Perhaps it would be easier to switch to using xBrowse instead.

James

driessen wrote:Hello,

If the value "oLbx:nAt" in a listbox, containing an array, gets a value which is higher then the length of the array, a bound array error occurs.

Is there no possibility to change the Twbrowse class in this way : when "oLbx:nAt" gets a value which is higher then the length of the array in the listbox, "oLbx:nAt" is automatically set to the length of the array. This would prevent the bound array error to occur.

My only problem : I know to little about classes to build this change.

Thank you very much in advance for any help.

If you are positioned on the last line of the array, and you delete this line, then you always have to take care about oLbx:nAt because otherwise the bound error array occurs. To my opinion that should be checked in the class itself.