Access Violation on Some Computers

Bestware

I am using Delphi 10.3 Rio with RB 19.04. On certain computers, an Access Violation happens on all my reports. They seem to be Windows 7 computers, but some Windows 7 computers work just fine. I am having to roll customers back to the previous version of my software using an older version of Report Builder. Is this a known issue?

nicocizik

Hi David,

We need more information about this specific AV in order to track down the issue. When does the AV occur? Are you able to trace into the RB source when the AV happens? Are you able to recreate this AV with a simple application?

Bestware

My problem is that it only happens on certain Win7 computers. None of my computers here in the office show the issue. I just upgraded from Rio 10.3 to Rio 10.3.2 and updated to ReportBuilder to 20.0 hoping that it would solve the problem. Unfortunately, it does not. The problem still exists. This is critical for me right now because I did some application coding changes for a new customer and now his system is giving this error. I could lose thousands of dollars over this if he is not patient.

Bestware

One of the errors on a customer computer says the following:
Error in fmRep1u.PrintForm at address 016E22BF in module 'Cap.exe'.
Read of address 0000001C.

Cap.exe is my application. I am not using packages.
fmRep1u.PrintForm is my form which holds all the pipelines, Report and Designer component, and it calls Print.

nicocizik

Hi David,

My first suggestion would be to set the Report.PreviewSettings.SinglePageOnly property to True and see if that helps the issue. It's possible the ThreadedPageCache mixed with another aspect of your app is causing the problem.

Beyond that, without a way to recreate the problem or a call stack, it will be extremely difficult to track down.

Bestware

I have a mad except report but it is too long to send as a post. I will send it via email.

Bestware

I sent the exception report by email.

I notice that I can access the report designer fine. I can load reports into the designer fine. When I click the preview tab in the designer, I get the access violation.

Any ideas would be greatly appreciated. I really need to resolve this problem.

Bestware

I found the problem. Totally on me. Sorry to waste your time, but I do appreciate you looking at it for me.

I had a routine that sets the email variables on all the reports for emailing. I had a call that did the following:

if (EmailTLSFlag='') or (EmailPort=25) then
TppSMTPIndy(wEmail.SMTP).IndySMTP.UseTLS:=utNoTLSSupport
else ... ;

For this to work, I had to assign wEmail like this:
wEmail:=TppEmail(Rep.Email);

Problem is that somehow this statement got moved to the else portion and never got called is TLS was not specified, thereby creating an access violation on this statement. The error did not appear on most machines because email variables were setup on them to use TLS and so this statement was never called.