Feature Request: Rate-limit NaN warning

[billdenney]

Is it possible to rate-limit this warning to once per iteration? While estimating a model just now, it showed about 20 times per iteration.

https://github.com/nlmixrdevelopment/nlmixr/blob/4ec38650baa06fa4d5822ebc977c6cad913518f4/src/saem.cpp#L1448

[mattfidler]

I can see the value, but it is a bit low on the priority list.

[mattfidler]

Once per saem problem now

[billdenney]

Thank you!