Good morning,

Sorry, I was wrong when writing the question, effectively what I am receiving is a empty string and what I want to store is an null.

David,
I have been trying to overwrite the Normalize method but it is not working for me, maybe I am not overwriting the method well

ClassMethod myPropertyNormalize(%val As %CacheString) As %String [ CodeMode = generator, ServerOnly = 1 ]
{
s str=""
//s code="%val" //i %parameter("TRUNCATE"),%parameter("MAXLEN")'="" s code="$e(%val,1,"_(+%parameter("MAXLEN"))_")"
//$$$GENERATE(" Q "_code)
$$$GENERATE(" Q "_$tr(code,$c(0),""""))
QUIT $$$OK
}

I am doing it right? (I guess not xD )

Thanks!.