fetch across commit

Listers,

I have a question where I need a little clarification about fetching across commits. Can this happen if the table being committed to is not the same as the tables(s) in the cursors?

For example, if I had :
cursor c1 is select empname form emp where  dept = 100;

open c1
loop
fetch c1 into var;
  exit when c1%notfound
  insert into table some_temp_table;
  commit;
  end loop
  close c1

I have a hunch this is causing 1555's for us. Thanks in advance for input.

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