#82 Illegal operation in the Arithmetic Expression Editor

[Olga Faber]

If you use the Logical operators:

X || Y
X or Y

X && Y
X and Y

or the unary Operators:

! X
not X

...

with flags in the 'Arithmetic Expression Editor',
the OK Button accepts the expression:

'Ok, no errors'.

For example: 'l1_flags.LAND_OCEAN and
l1_flags.COASTLINE'.

However, if you try to open the created band, you will
obtain the
following error message:

'An exception occured: (Do your mean
here "EXCEPTION")
Type: com.bc.jexp.EvalExeption (Do your mean
here "EXCEPTION")
Message: illegal operation'.

If this change occurs while the band you have
calculated is still open,
you will not get any warning message but VISAT will
freeze.