If you're running 2.x make sure you actually have enough free space for 
the operation - I don't recall if we had dynamic memory growth in 2.x 
and unless you specify sufficient memory the VM will start with a 
default allocation (don't remember how much) and not grow. If that isn't 
it, check if you have SmallInts or other objects in there that the VM 
cannot become - this might simply be a bug in your porting process and 
may have nothing to do with the become operation.

Cheers,
   - Andreas

Klaus D. Witzel wrote:
> Hi,
> 
> I'm backporting code to Squeak2.x and an ivocation of 
> #elementsExchangeIdentityWith: which works fine with some 117k elements, 
> fails under the Squeak2.x VM :(
> 
> Searched the list archive to no avail. Was there something in the past, 
> a limit on the # of elements? What directions can there be towards a 
> solution, TIA.
> 
> /Klaus
>