After running a somewhat complex stan model that takes a long time to run >2 days I recieve an error

`Error: cannot allocate vector of size 250 Kb`

and when I call the model I get the message

` Stan model 'exemplar_validate' does not contain samples.`

Is there any way to salvage the results of the model fitting? It ran through all the iterations but was not saved in the fit object.

Would be really a bummer to lose all that data. Are there any suggestions for avoiding this kind of problem in the future? Thanks so much