"pete.muir(a)jboss.org" wrote : You've probably got the problem described here: | | http://wiki.jboss.org/wiki/Wiki.jsp?page=SeamProblemsFAQ regard @NotNull, @Length etc. Hi, I have the same problem with an @Email annotated field. The problem is that the field can allow null values (so no @NotNull, the field is nullable in the DB). It throws the same error as this thread describes. I looked into the EmailValidator and for a null/empty string it shoul be a valid email. And still I get the InvalidStateException... public boolean isValid(Object value) { | if ( value == null ) return true; | if ( !( value instanceof String ) ) return false; | String string = (String) value; | if ( string.length() == 0 ) return true; | Matcher m = pattern.matcher( string ); | return m.matches(); | } I also have the same problem with a field marked with @Pattern. If the field is empty (and also is not required), when the page is saved I get to the debug page with a stacktrace and again the cause is InvalidStateException I looked into the Pattern isValid method from SVN and it doesn't check if the field is of length 0 ( aka '' - empty string). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4056931#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...