**ERROR: stack overflow: grid stack

[Daniel Mueller <mueller@xxxxxxxxxxxxxxxx>]

Hi ferret users

I am running in trouble while precessing a large number of netcdf files
with ferret V500beta1.1.
The Problem is that ferret seems to create a new set of grids for every
file which is being opened, even if other previously opened files habe
been canceled using "cancel data 1".
I even tried opening a file, closing it and then opening the exact same
file again which produced another identical set of grids.
Is there a way to prevent this, since (afaik) there is no such thing as
a "cancel grid" command. Or is there a posibility to tell ferret to use
a specific already existing grid for every variable in a file being
opened?
Is there no other way at all to get rid of all those (identical sets of)
grids than exit ferret and restart it?

Any help would be appreciated

Daniel