How import assembly doc?

Hi everybody.

I need import assembly doc, but now in X3 V12 this object hasn't active import check.

I try to active and create import template, but all time system says that first line are not completed, and don't create doc.

First, in BBY Object, I active import check, and attach tables SMVTH and SMVTD with this format:

I add 2 lines of SMVTH because Screen BBY0 have 1 line and 1 grid , with NBLIG param.

Next, I create import template with 2 tables SMVTH and SMVTD.

First tests, system returns error, next, i create script to indicate fields like NBLIG and others of screen BBY0 but really saved in SMVTD table, but not works fine...

All time returns this message:

Any have import of assembly doc? any knows if it's possible or not create import template?

Thanks a lot!