[ferret_users] Internal: unexpected modulo jump!

[Ge Peng <gpeng@xxxxxxxxxxxxxxxxxxxxxxx>]

Hello,

I am using a ferret script to remove the seasonal cycles of a variable
with the following method:

set dat climatological_axes
let var = var_mod[d=1]
let var_mon = var[gt=month_irreg@mod]
let var_p=var-var_mon[gt=var]

for several dataset first, and then using the resultant anomalies to
compute variance, to plot the results, and to save the results to a nc
file.

Both figure and output nc file appear to be fine, however, I am getting
the following message a number of times while running the script:

*** NOTE: Internal: unexpected modulo jump!

Does anyone know what does it mean? Is it anything I could do to eliminate
this message?

Thanks,

--- Peng