You must have files with the same name in all of them? If you are using 
IDE 4.5 and above in Debug tab of launch configuration check option "Use 
full file path for breakpoints",
on Source tab remove default lookup and add Absolute path lookup. That 
should work assuming you compile sources from IDE.

Oleg Gopov wrote:
> Hello friends. 
>
> I develope three projects and i must to debug  them at the same time.
>  
> When I set breakpoint in the one project , this breakpoint hits in other project.
>
> How to resolve this problem. Thanks in advice.
>
>
>
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> http://community.qnx.com/sf/go/post36468
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