How can we pass a form field data from a custom session to a standard session in LN CE (MT)? But export() and put.var() functions are not trusted in LN CE as we have also enabled extensibility. We do not want to create any custom table to use as temporary table to store and pass the data by using that table.
In the following session, we have created a CDF field "Date" (Bordered with Red Rectangle), We have added one Custom Form Command as "Reconcile" to call a Custom Session in next screenshot.

In the following screenshot we have called the custom session via custom form command "Reconcile" and we will put the date in this custom session. Then we will click on "OK" then will close the session. At this time we want to pass the same date data into the CDF field of "Cash Flow Transaction" session.
