Hi @jlaps ,

I think you are right.

It's failing because each time it tries to access the same data source → same export set → same MID Server.
If the mid server is slower to respond or if the disk I/O is already busy, subsequent workflow could report “success” prematurely, or fail silently if the underlying process hangs.
To avoid this situation can't you try using staging table instead of directly exporting and then use a scheduled job to export data from this table every few minutes.

Regards,
Mohammad Danish