Strange thing about Dll

["Alex" <comtek@solaris.ru>]

Hi everyone!

Using BCB3 I've made an application (.exe file) that calls some functions
from a Dll. That Dll I've also made using BCB3. 
I included .lib file for this Dll in the project for my .exe.

Now strange thing happens sometimes:

I modify some function in my Dll. I DO NOT modify its declaration, return
type, calling convention etc!
I ONLY modify its body! One even does not need to re-link any exe file
which uses that Dll after such modification of the Dll, right?

HOWEVER, when after such modification of my Dll I re-link my .exe file
(which uses that Dll) and try to run it I quite often can't run it at all!
It fails with "Access violation" exception somewhere before WinMain, namely
somewhere near the label VCL_Linkage or something like this.

Am I doing something wrong? Am I mistaken? Has anyone experienced such a
problem?

(I do not use Strings as parameters or return types , be sure :-))