Fetch from Dynamic cursor

[Matteo Gattoni]

Hi,
  I'm using Dynamic cursor declared in the following way:

    stmt = 'DECLARE Children' || child || ' CURSOR FOR SELECT E_ACT_K_ACTIVITY2 from 
PSF.ACTIVITY_RELATIONSHIP  '
    ||  '  WHERE E_ACT_K_ACTIVITY1 = ' || child;
    EXECUTE stmt;

 When I try to fetch it using
    
    stmt = 'FETCH Childrens' || child || ' INTO :n_child';
    EXECUTE stmt;

  the variable n_child is always null; even if the select isn't empty.

  I've tried to declare the cursor in a different way:

$CURSOR = 'Children' || child;
DECLARE :$CURSOR CURSOR FOR SELECT E_ACT_K_ACTIVITY2 from PSF.ACTIVITY_RELATIONSHIP 
WHERE E_ACT_K_ACTIVITY1 = :child;

    and using FETCH :$CURSOR INTO :n_child;
    But I'm not able to compile the procedure because MaxDb says General error;-5006 
POS(1223) Missing identifier.

Finally, I've tried like that:

$CURSOR = 'Children' || child;
stmt = 'DECLARE ' || :$CURSOR || ' CURSOR FOR SELECT E_ACT_K_ACTIVITY2 from 
PSF.ACTIVITY_RELATIONSHIP 
WHERE E_ACT_K_ACTIVITY1 = :child';
EXECUTE stmt;

But it says General error;-7045 POS(1084) Parameter spec not allowed during 
compilation.

How could I create cursors with different name depending on a variable? And how could 
I fetch them?

I need this purpose because I have a recursive procedure that every time create a 
cursor, using different name I hope that it wouldn't rewrite the old istance.

Thanks in advance.
Bye,
   Matteo