Worksheet failing when reaching a large number of rows

Hi all
I want to say that our incident was solved. It was sufficient to change our
strategy on managing objects. We added another block for objects when
start processing a row of data, and destroy that block at end of processing
that row. In this way, the process does not generate a long stack of
memory. We have worked well in our first test. No other problems
appeared...yet. Next week we will be more assured.
Regarding Don Brown questions it is our question also. I will try to check
your way of solution. I suppose from some example that you required some
action on streamfile as well. But I haven't resources to test until
tomorrow.