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PROC OPTMILP problem - has anyone used this proc?

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PROC OPTMILP problem - has anyone used this proc?

I'm having a problem running PROC OPTMILP. It keeps running out of
memory and stopping. I've set MEMSIZE high (3145728000), as
instructed in the documentation, but the procedure doesn't seem to be
using that much anyway (1183014k).
.
Has anyone ever successfully used this procedure on a decent sized
problem?
.
SORTSIZE=1048576000
SUMSIZE=1048576000
MAXMEMQUERY=2147483647
MEMBLKSZ=16777216
MEMMAXSZ=2147483648
LOADMEMSIZE=0
MEMSIZE=3145728000
REALMEMSIZE=3145728000
.
The output from the procedure is as follows:
.
NOTE: PROCEDURE OPTMILP used (Total process time):
real time 58.32 seconds
user cpu time 52.20 seconds
system cpu time 4.67 seconds
Memory 1183014k
NOTE: The problem DIVERSIFICATION has 46656 variables (46656 binary, 0
integer, 0 free, 0 fixed).
NOTE: The problem has 23221 constraints (0 LE, 23221 EQ, 0 GE, 0
range).
NOTE: The problem has 93096 constraint coefficients.
NOTE: The OPTMILP presolver value AUTOMATIC is applied.
NOTE: The OPTMILP presolver removed 0 variables and 0 constraints.
NOTE: The OPTMILP presolver removed 0 constraint coefficients.
NOTE: The OPTMILP presolver modified 0 constraint coefficients.
NOTE: The presolved problem has 46656 variables, 23221 constraints,
and 93096 constraint coefficients.
NOTE: The MIXED INTEGER LINEAR solver is called.
Node Active Sols BestInteger BestBound
Gap Time
0 1 0 .
12605.2062347 . 0
0 1 1 1319.1645766 12210.8590933
89.20% 9
0 1 1 1319.1645766 11986.5483478
88.99% 15
0 1 1 1319.1645766 11798.5115050
88.82% 24
0 1 1 1319.1645766 11758.4731385
88.78% 33
0 1 1 1319.1645766 11741.2293249
88.76% 41
0 1 1 1319.1645766 11712.8858308
88.74% 44
NOTE: OPTMILP added 751 cuts with 1812 cut coefficients at the root.
NOTE: Out of memory.
WARNING: Not enough memory for outputting solution.
NOTE: The data set WORK.PRIMALOUT has 46656 observations and 8
variables.
NOTE: Compressing data set WORK.PRIMALOUT decreased size by 59.93
percent.
Compressed is 367 pages; un-compressed would require 916 pages.
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