User Breakpoint Called From Code At 0X7c90120120e

User Breakpoint Called From Code At 0X7c90120120e

Im debugging a code in VS that I wrote in C. For some reason, at some
point it jumps to an assembly window with the following line:
int 3
And a pop up message box appears with the following message:
User Breakpoint Called From Code At 0X7c90120120e
I looked at the stack, and the command that cuased that was MALLOC !
The wierd thing is, when I press OK at the message then F5 to continue
debugging it continues and everything works 100%. But when I try to
execute the code I get a message that my project encountered some problem.
I tried cleaning my project, rebuilding, removing all breakpoints ..
nothing worked.
Would appreciate your help.