Problems using reanimator-lttng

[aemiranda7]

We are doing an academic project using this tracer and we are having some problems using this tool to trace a postgresql server.
We are doing the following command:
lttng-client -s session/ -d pgsql-ds.ds -e $(pg_ctl -D pgsql_data/ start)
But the tracer crashes and generates a corrupted data series file when we stop the server. In reality the tracer only starts when we make the stop command and crash instantly.
We wanted to know how can we do it properly anda also how we can trace the child processes like we do using the strace from linux, we want to have the dataseries output of lttng with information about the childs.
We already sent an e-mail to Lukas and Îbrahim with more details about this issue.