Ref: https://communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum/229400/bentley-swmm-engine-failure-when-run-24-hours/
Additional to the above, I tried exporting to MicroDrainage but unfortunately, I was not able, I tried the Rational scenario then I tried another scenario but did not get the exported file.
Regards,
Mohamad