Snapshot Pro results to Internal Server Error on certain (bigger) DB Tables

hey there,

I tried to get a DB backup with Snapshot on my website's DB. It works fine, but always exits on the same table with some statistic data so I create a job only for that table. Every time, regardless of the amount of memory or segment sizing, it stops at about 87 % of the ca. 300.000 entries. Annother table with some 200.000 entries more works fine but is 20MB smaller in size.
Data check on this table is fine, also optimizing, reparing etc.
A dump with phpMyAdmin results to a total 160MB SQL file without probs, except waiting...

furthermore there is no error with # 500 in php or server error log.

how can I fix this?

thanks for your feedback!