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R optimx, recovering internally stored values after interruption

My optimization code runs for several days, and for external reasons, I have from time to time to interrupt/abort the code, by clicking on “stop” with R-studio.
Is there a possibility to see what is the content of the last optimization iteration, which has not been save in an object (but must be in the computers’ memory), or is this information definitively lost?
traceback() is not helpful.
I use the optimx package.