Truncating The Package Buffer After Each Table Copy

Hi
I have a SSIS package that I run from dtexec command prompt in parallel. they run completely isolated.
Sometime when I push 3 instance of the packege at the same time, one of the instances will fail.
I have implemented detail Log on the package to see exactly where it's going wrong.

to brife you on what the package does, I can say in nutsheel that it does copy tables between servers.

due to the nature of the problem, the point in failer can is completely random.

if I run just one instance it will work fine (always). if it is more than one that there is a chance that it might fail. (but there is agood chance that they will run successfully).

my guess is, as this packages share resources (CPU,Mempry and disk I/O) sometimes is there is anyshortage on of the packages can fail.
is there anyway to specify how log for example a sql object transfer task will wait before raise and error message.



ALSO is there a way to truncate the memory bufferafter each table copy as it seems like when it is loops for differnet tables they data copy content get's piled up in memory and it get's truncated only when the whole instance is finished not after each table copy

Thanks