[daip] SCMAP infinite loop? (31DEC09; MNJ 2009 July 1)

[Michael Bietenholz]

   SCMAP seems to be getting itself into an infinite loop.
It works fine up untill the last iteration, then it just kept doing this:

SCMAP1 12:37:01 ALGMEM field    1 Ipol gridded model subtraction chns    1-    1
SCMAP1 12:37:01 ALGMEM:   256 - 0 cells, with      115071 Pts
SCMAP1 12:37:01 Field    1 min =   -3.2 MilliJy,max =    4.8 MilliJy
SCMAP1 12:37:01 CLRHIS: NO FIELDS THIS PASS ABOVE MINIMUM FLUX
SCMAP1 12:37:01 Field    1 min =   -3.2 MilliJy,max =    4.8 MilliJy
SCMAP1 12:37:01 CLRHIS: NO FIELDS THIS PASS ABOVE MINIMUM FLUX
SCMAP1 12:37:01 Field    1 min =   -3.2 MilliJy,max =    4.8 MilliJy
SCMAP1 12:37:01 CLRHIS: NO FIELDS THIS PASS ABOVE MINIMUM FLUX
SCMAP1 12:37:02 Field    1 min =   -3.2 MilliJy,max =    4.8 MilliJy
SCMAP1 12:37:02 CLRHIS: NO FIELDS THIS PASS ABOVE MINIMUM FLUX
... etc

till I killed it.  I tried different weightings, solints, clean
boxes, always winds up as above.

The 31DEC07 version runs fine with exactly same input parameters
on same data set.

                           michael b