addexp, lstexp

[johnny_job]

Hello all. I'm trying to play with texis word-breaking algorithm. I use this code:
SET delexp=0;
SET addexp='\alnum{7,99}';
CREATE METAMORPH INVERTED INDEX PlainTextIndex on Documents(PlainText);

Then I call lstexp from another script:
SET lstexp=100;

and it write to me that the only expression is default:
\alnum{2,99}

When I call lstexp from the first script, it writes proper value: \alnum{7,99}. What I do wrong?

[johnny_job]

Thank you.