Maximum Numebr Of Session reached error.

Hello Friends,
When we are processing to post the inbound deliveries using the RBDAPP01, the deliveries are getting posted but we also get dumps in ST22 as a CALL_FUNCTION_OPEN_ERROR.
The numbre of dumps are also very high as the file has  also has around 3000 idocs to process.
When we run RBDAPP01 Program in foreground we get the pop up message as Maximun number of sessions are reached.
Not come across such kind of issue.
Any hint to tackle and avoid these dumps.
Best Regards
Prashant

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