Using V5, I just ran your INP file on a local PbSO4.RAW file and all seemed to have worked; the output I get is:
Non-linear least squares (c) 1992-2014 Alan A. Coelho
Loading C:\c2\t5-ta5\ta-web2\topas.inc
Number of independent parameters : 65
0 Time 0.19 Rwp 99.906 0.000 MC 0.00 0
Loading C:\c2\t5-ta5\ta-web2\topas.inc
Loading C:\c2\t5-ta5\ta-web2\interface.inc
Sparse matrix methods invoked - 66.7% of the A matrix elements are zero
1 Time 0.26 Rwp 95.440 -4.466 MC 0.96 3
2 Time 0.26 Rwp 77.978 -17.462 MC 0.17 1
3 Time 0.26 Rwp 69.862 -8.116 MC 0.04 1
4 Time 0.26 Rwp 69.736 -0.125 MC 2.42 1
5 Time 0.27 Rwp 66.280 -3.457 MC 0.31 1
6 Time 0.27 Rwp 63.230 -3.050 MC 0.07 1
7 Time 0.27 Rwp 59.558 -3.671 MC 0.02 1
8 Time 0.28 Rwp 55.714 -3.845 MC 0.14 1
9 Time 0.29 Rwp 46.998 -8.716 MC 0.04 1
10 Time 0.29 Rwp 43.574 -3.423 MC 0.01 1
11 Time 0.30 Rwp 37.699 -5.875 MC 0.00 1
12 Time 0.31 Rwp 33.413 -4.286 MC 0.00 1
13 Time 0.32 Rwp 29.495 -3.918 MC 0.16 2
14 Time 0.32 Rwp 27.000 -2.495 MC 0.04 1
15 Time 0.34 Rwp 26.919 -0.081 MC 0.01 1
16 Time 0.35 Rwp 26.918 -0.000 MC 2.13 2
--- 0.355 seconds ---
*** Parameter(s) close to limit(s).
Check for LIMIT_MIN and LIMIT_MAX in Grid/Text
File C:\c\t5\test_examples\aac.out updated
with parameters from last iteration
Process Times (secs)
0.02 = Ycalc calculation and Penalties
0.00 = Summing peaks to Ycalc
0.02 = A and Y matrix dot products and derivatives
0.01 = Peak buffer derivatives
0.00 = A and Y matrix dot products
0.00 = Solution to the normal equations
The error seems like a licensing problem. Can you run any of the test examples.