Evaluator textual filter with Filter Object

Help & Support
1

If I define a Filter like this:

var filter = DOpus.Create.Filter('=Match(Val("scp:col_search_test/texto"),"m","p")');
if (filter.valid)
	DOpus.Output("Valid");
else
	DOpus.Output("Not valid : " + filter.lasterror.message);

will work. However if I want to define more than one line, using Filter.Add(), the same textual filter will not be valid, but with no error message:

var filter = DOpus.Create.Filter();
filter.Add('=Match(Val("scp:col_search_test/texto"),"m","p")');
if (filter.valid)
	DOpus.Output("Valid");
else
	DOpus.Output("Not valid : " + filter.lasterror.message);

Is there anything I'm overlooking?

Edit: With the first example, I'm going to get an 0x80004005 Error whenever I try to use that Filter (e.g. with the Command.SetFilter method)

2

So it seems that you can't create a Filter object using a textual filter containing Evaluator syntax, right?
So, is there another way to know if an Evaluator clause is valid before using it? The problem is that you cant handle the Evaluator errors that can happen from within the script, which in turn causes an error for each file used by the command.