A new datawindow in our PB2022 application (22.2.0.3289) has a button on it. I have never used a datawindow button before. For several of my users clicking the same button on the same row twice in a row crashes the program. The crash usually occurs in PBDWE.DLL but sometimes it occurs elsewhere. I cannot locate the line where the crash happens but it happens before the first line in the buttonclicked event.
Anyone else have problems with clicking a button on a datawindow?
To clarify - If the user clicks ONCE, the app works correctly? Yes, except when a particular sequence of steps is involved in which case it consistently happens on the first click. The sequence of steps are ones that a user would likely execute, so this is a significant issue.
Have you tested to see if the same error occurs in another, different DataWindow Control? No. The problem doesn't happen after the second click. It happens sometime after the first click. Also, it also always happens on the first click after a particular sequence of steps, but I would need to send you an installation program so you have the entire program to execute the sequence of steps.
The only consistent thing I can say about it is that when I run the debugger, the crash happens after the clicked event exits and before any other debuggable code executes.
Does the app crash when running from the IDE, when compiled/deployed, or both? Both
Is the application running as 32-bit or as 64-bit? 64-bit
Does the user click twice in rapid succession (such as when double-clicking) or is there a pause between clicks? Have you tested to see if there is some threshold (delay) that permits the app to work without crashing? There is a pause between clicks.
Is the app built using a framework, such as the PFC or STD class libraries? We use an old version of the PFC
Is the DW Control a descendant inherited from an ancestor DW control? Yes.
Does the DataWindow Control (or any ancestor DWC) have code present in any of the following events?
//////////////////////////////////////////////////////////////////////////////
// Event: clicked
// Description: DataWindow clicked
//////////////////////////////////////////////////////////////////////////////
// Rev. History Version
// 5.0 Initial version
// 6.0 Added Linkage service notification
// 6.0 Introduced non zero return value
// 7.0 Do not bypass processing on linkage failure.
// 7.0 Linkage service should not fire events when querymode is enabled
//////////////////////////////////////////////////////////////////////////////
// Copyright © 1996-2000 Sybase, Inc. and its subsidiaries. All rights reserved. Any distribution of the
// PowerBuilder Foundation Classes (PFC) source code by other than Sybase, Inc. and its subsidiaries is prohibited.
//////////////////////////////////////////////////////////////////////////////
integer li_rc
boolean lb_disablelinkage
// Check arguments
if IsNull(xpos) or IsNull(ypos) or IsNull(row) or IsNull(dwo) then return
// Is Querymode enabled?
if IsValid(inv_QueryMode) then lb_disablelinkage = inv_QueryMode.of_GetEnabled()
if not lb_disablelinkage then
if IsValid (inv_Linkage) then
if inv_Linkage.Event pfc_clicked ( xpos, ypos, row, dwo ) = &
inv_Linkage.PREVENT_ACTION then
// The user or a service action prevents from going to the clicked row.
return 1
end if
end if
end if
if IsValid (inv_RowSelect) then inv_RowSelect.Event pfc_clicked ( xpos, ypos, row, dwo )
if IsValid (inv_Sort) then inv_Sort.Event pfc_clicked ( xpos, ypos, row, dwo )
//////////////////////////////////////////////////////////////////////////////
// Event: lbuttondown
// Description: Send lbuttondown notification to services
//////////////////////////////////////////////////////////////////////////////
// Rev. History Version
// 5.0 Initial version
//////////////////////////////////////////////////////////////////////////////
// Copyright © 1996-2000 Sybase, Inc. and its subsidiaries. All rights reserved. Any distribution of the
// PowerBuilder Foundation Classes (PFC) source code by other than Sybase, Inc. and its subsidiaries is prohibited.
//////////////////////////////////////////////////////////////////////////////
if IsValid (inv_RowSelect) then inv_RowSelect.event pfc_lbuttondown (flags, xpos, ypos)
//////////////////////////////////////////////////////////////////////////////
// Event: lbuttonup
// Description: Send lbuttonup notification to services
//////////////////////////////////////////////////////////////////////////////
// Rev. History Version
// 5.0 Initial version
//////////////////////////////////////////////////////////////////////////////
// Copyright © 1996-2000 Sybase, Inc. and its subsidiaries. All rights reserved. Any distribution of the
// PowerBuilder Foundation Classes (PFC) source code by other than Sybase, Inc. and its subsidiaries is prohibited.
//////////////////////////////////////////////////////////////////////////////
if IsValid (inv_RowSelect) then inv_RowSelect.event pfc_lbuttonup (flags, xpos, ypos)
Would you be able/willing to include the ButtonClicked event script?
iw_Parent.EVENT ue_LogEvent( THIS, "Event ButtonClicked")
// Open window to prompt for values file
of_LoadCustomValues( Row )
Best regards, John
Hi, Gordon -
Using PB 2022 R3 Build 3356 with the runtime set to Build 3289, I'm unable to replicate the issue as a test case with the information you've supplied.
Can you please list or post a snapshot of the General properties of the Button DWObject, such as what I've included below:
To clarify - If the user clicks ONCE, the app works correctly?
Have you tested to see if the same error occurs in another, different DataWindow Control?
Does the app crash when running from the IDE, when compiled/deployed, or both?
Is the application running as 32-bit or as 64-bit?
Does the user click twice in rapid succession (such as when double-clicking) or is there a pause between clicks? Have you tested to see if there is some threshold (delay) that permits the app to work without crashing?
Is the app built using a framework, such as the PFC or STD class libraries?
Is the DW Control a descendant inherited from an ancestor DW control?
Does the DataWindow Control (or any ancestor DWC) have code present in any of the following events?
Would you be able/willing to include the ButtonClicked event script?
Best regards, John
