I have a question about stored procedure insert errors.

I have 2 columns:

The default value of RSIGN is NULL, for NO_SIGN it’s 0.

I tried like this:

IF (@RSIGN IS NULL) OR (LEN(@NO_SIGN) = 0)
    INSERT INTO #Errors 
    VALUES (-1, 'Please enter data in RSIGN or NO_SIGN) 
END

However, if no data is entered in these two columns, the error message will not appear.

I want to make it if any one column have value changed, the message does not appear.

Thanks for any help.