hi,

(I think) If you open a table with pass throught, you must be update table with pass throught.

If you want to update file with browse you must be:
create connection myconnection datasource ....
create sql view myview remote connection myconnection as select ......
*-------------------------
...
keyfield, updatable fields, updatenames descriptions
...
*-------------------------
use myview in 0 alias xxx
browse

if you send me a mail for easyless it I can send you to my functions:

.....
osql.createview("myview","sqltable")
osql.updatable("myview")
osql.keyfield("mykeyfield")
browse