[Thu May  3 17:40:35 2012] Detection parameters:
  Position = (353.9, 276.1) = 0 24 58.19 64 5 52.1
  Extent = 10.9" x 10.9", rotation angle = 0 degrees
  Source counts = 25065.2 +/- 200.9
  Background counts = 328.1
  Rate = 1 +/- 0.01

[Thu May  3 17:40:54 2012] Off-axis axis estimate = 4.34'
[Thu May  3 18:07:41 2012] Using EEF radius (= 8.60 ")to estimate initial spatial extent for simple fitting
[Thu May  3 18:07:41 2012] Initial guess for spatial extent in simple fitting = 8.60"
[Thu May  3 18:07:41 2012] source mask rpix=2.0, npix_max = 24, mask sum = 25, frac = 1.019
[Thu May  3 18:07:41 2012] Giving source the simple spatial ID 46 for pass 0, mean size = 8.60"
[Sat May 12 14:11:39 2012] fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_src46.ximg exists
[Sat May 12 14:11:39 2012] fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_src46_1.ximg exists
[Sat May 12 14:11:39 2012] Fit fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_src46 appears to have run properly
[Sat May 12 14:11:43 2012] fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_tfrozen_src46.ximg exists
[Sat May 12 14:11:43 2012] Warning: poor agreement between model and actual number of counts may be indicative of a poor fit in csv/fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_tfrozen_src46.csv
[Sat May 12 14:11:43 2012] fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_tfrozen_src46_1.ximg exists
[Sat May 12 14:11:43 2012] Warning: poor agreement between model and actual number of counts may be indicative of a poor fit in csv/fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_tfrozen_src46.csv
[Sat May 12 14:11:43 2012] It looks like the fit did not converge
You should probably delete fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_tfrozen_src46_1.ximg
Either tweak this fit manually starting from fullrun_pn_xmm0511180101_pi300-10000_cl_pass0_tfrozen_src46.ximg or adjust the simplespatial fit parameters in $XASSIST/data/missions/*/*/spatial.dat and re-run simplespatial fitting after setting file recreation parameter to yes