Field redistribution line by line

[David Squance]

Hello Group,
I'm having trouble with a script which takes individual lines from a field
and places them in various fields on another card (and stack).  The basic
structure involves a repeat loop which works through each line of the
source field, assigning it a variable name, and then is supposed to place
each of those into separate fields in the destination card.  What's the
proper syntax for this?  I can't make the
    do "put tname" & x && "into fld fname" & x
approach work.
Dave