Replacing monthly values in Stata

Stata_monthly_replace.do

forvalues year = 2005/2011 {
    forvalues month = 1/12 {
        if `month' < 10 {
            local mo_str = "0`month'"
        } 
        else {
            local mo_str = "`month'"
        }
        local yearmo = "`year'`mo_str'"
        di "`yearmo'"
        capture confirm variable prob`yearmo'
        if !_rc {
            replace prob`yearmo' = 103 if prob`yearmo' == 101
            replace prob`yearmo' = 101 if prob`yearmo' == 111
        }
    }
}