string: finding and marking in custom properties

[Lars Brehmer]

I can't seem to find help in the docs for this one, which is probably  
an extremely simple syntax question.

I have a find script that looks in the custom properties of the cards  
in a stack and marks the cards that match;

do some stuff
mark cds where (the findIt of me) is among the words of the ansP of  
this cd
do some more stuff

Now this works just fine but for several reasons I'd rather be  
looking for a string, not a word or a set of characters, but I can't  
get the syntax right.

mark cds by finding string (the findIt of me) in the ansP of this cd

this doesn't work and neither does any variation that I could come up  
with, same with "mark cds where string "xyz"....  The contents of  
these custom props are in uniEncode UTF8.  What am I doing wrong  
here?  It seems like it shouldn't be a problem.

Cheers,

Lars