Hey,
for 3650/3850 platforms please check CSCvh56835. If you see this error message you most likely hit out of memory condition due to memory leak. If the switch crashed, you can confirm that by checking crashinfo file from switch-report located under crashinfo:/ filesystem (crashinfo-X: if you have a stack with multiple members).
Due to not implemented CSCvf57922 we don't have yet in switch-report all the necessary information to say what is exactly leaking. The only option is to monitor memory usage on the switch after reload:
show platform resources
show platform software status control-processor brief
show processes memory platform sorted
show platform software process memory R0 all rss sorted
show platform software process memory R1 all rss sorted
show platform software process list R0 sort memory
show platform software process list R1 sort memory
The best option would be to open a TAC case, but if you can't do it please upgrade the software at least to the recommended release (marked with a star on the download page) and monitor memory usage.
Hope that helps,
Dawid
