We have a lot of R&S DVMS and sometimes they return NAN on an OID that was supposed to be a number which dataminer displays as NaN

I added exception to the protocol

Whilst my exception gets picked up in the element - it never goes into alarm.

I then looked at the Others\Other Tags

https://docs.dataminer.services/develop/schemadoc/Protocol/Protocol.Params.Param.Interprete.Others.html

So setup a parameter 3312 of string "NAN" and to replace it with value -3 which I can set an alarm template on and it does alarm, however despite most of the time getting real numbers on the stream viewer the parameter is now permanently stuck with the "other" display value.

What am I missing here to get the alarm to generate?