weee i found it.
topas shows the process id/ application and the memory used.
topas:
app_bg (264688 8.2% PgSp:119.7m user_blah
One of our processes had ~119 used when the alloc error began.
the other processes only need 0 - 2 MB memory.
And with the process Id i found the leaking process of course, now we just need to find the leak
Lazzar