There is not enough main memory available to open a database session or execute the database procedure.
Increase the memory that is available to your database.
You can only open a session when at least one other user has terminated their session. Reduce the number of sessions if possible.
Try to execute the database procedure at a later stage.
Check the system table MEMORYALLOCATORSTATISTICS for details on memory consumption.
System Tables, MEMORYALLOCATORSTATISTICS