>SET FILTER TO dmrr >= "01/01/"+ALLTRIM(m.dmryearpick)
>
>dmrr is a date. This is giving me a syntax error. m.dmryearpick is a 4 digit year. Anyone know what the correct syntax for this command should be?

set filter to dmrr >=date(m.dmrYearPick,1,1) && assuming that dmrYearPick is a public variable.

Are you sure you want to go with SET FILTER at all? There may be better alternatives.