Dear All,
I was implementing a Brauer character mapping for spin blocks, and
used a loop
Flag := 0
while Flag = 0
...
...
...
od;
The loop worked fine and went around three times, and then at some point
Flag := 1
It got to the od; at the bottom, jumped up to the while and then I got
an error message
error no 1st choice method for '[ ]'with 2 arguments in Flag = 0 called
from .....
What causes such an error? I got it once before, when trying to read
entries in an empty list, but Flag is not a list.
Thanks,
Malka Schaps
Prof. Malka Schaps
partment of Mathematics
Bar-Ilan University
Ramat-Gan,Israel 52900
Office: 03-5318767
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