[Dev-C++] anoying message box

[Vlada D. <dj...@im...>]

Hi.
Sometimes, when I type code in editor, this anoying message box keeps
appearing, saying "List index out of bounds", or something like that. I
noticed that it mostly appears when I use the .(dot) operator for assigning
values to structure members or class members. I use Dev-cpp 4.9.6.0 and
Win2000. What does this message box mean and is there a way to turn it of?

Regards,
Vlada