Jerry,
The array.bas example that I inherited with the 2.1 release from Peter Verhas seems to work as intended under Ubuntu 14.04 64 bit. I added a couple newlines for clarity.
a[5,3]=4
c = a[5]
print a[5,3],"\n",c,"\n"
jrs@laptop:~/sb/source/examples$ scriba array.bas
4
ARRAY@#00A706C8
jrs@laptop:~/sb/source/examples$
Something more fun.
a[1000000,1]="one"
a[1000000,2]="two"
a[1000000,3]="three"
REF b = a[1000000]
PRINT "Simple as ",b[1],", ",b[2],", ",b[3],". (million)\n"
b[1] = 1
b[2] = 2
b[3] = 3
PRINT a[1000000,1] + a[1000000,2] + a[1000000,3],"\n"
jrs@laptop:~/sb/sb22/test$ time scriba reftest.sb
Simple as one, two, three. (million)
6
real 0m0.004s
user 0m0.004s
sys 0m0.000s
jrs@laptop:~/sb/sb22/test$