I have now (it was just edited in I think) :

C:\Users\XX\TestSafe>teststeve.pl
ARRAY(0x37c520)
C:\Users\XX\TestSafe>
[download]

My function DataMatrix2d works fine outside of the safe compartment. (Note the last several lines of my code above don't make that much sense - I'm testing the wrong stuff after the code ref check, but my problem comes before then)