How to get the value from session field

Hi,

i wanted to reference a satellite Session to the mmt-Session via add.sync.field (because the reference ist an cdf_field).

In the program section of my mmt-Session I added the following code. It doesn't work because the formfield"txsct001.sern" seems to be empty . But it is displayed in the session!! What is my fault??


extern domain tsacm.cact str.cact

after.form.read:

add.sync.fields("tsacm1101m000","str.cact", "tsacm101.cact")

select tsacm101.cact :str.cact
from tsacm101
where tsacm101.cdf_sern = :txsct001.sern
selectdo

endselect

Any advice will make me happy!