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I am using MySQL Data Access Component (MyDAC) v. 4.00.1.6 / Borland C++ Builder 5

My application slowly "eats up memory" if regularly accessing a field that does not exist even though there is a try ... catch around accessing the nonexisting field.

try
{
GroupID = MyTable->FieldByName("GroupID")->AsInteger;
}
catch (...)
{
GroupID = 0;
}


Would it help to upgrade to latest version of MyDAC ?

We couldn't reproduce described problem using the current MyDAC build. Try downloading current version of MyDAC (4.30.1.15) and test the problem once more. If it persists then send us (evgeniyD*crlab*com) please a complete small sample to demonstrate it, including script to create and fill table.

I have tried MyDAC v. 4.30.1.15 - problem still exists.

I have sent an example to 'evgeniyD*crlab*com'

Regards Hanne

We have thoroughly tested this problem. This is memory leak of C++Builder error handling system. It appears when handling exceptions that are raised from functions in dcu made by Delphi. It can be easily reproduced using ADO components instead of MyDAC or by calling instead of

Does anybody know :
Would it also happen for if upgrading to C++ Builder 6 or Borland Developer Studio 2006?

We can reproduce this problem in C++Builder 6 but not in Borland Developer Studio 2006. We have tested the solution you have sent us by e-mail. Changing to really helps to avoid the memory leak.

I have tested during the last 15 hours. No memory has been lost at all.

Exception has been raised more than 125,000,000 times.

So it is the catch (...) for Borland C++ Builder 5/6 that is the problem and should be substituted by catch (Exception &E).