simon@josefsson.org writes:

> Walter Franzini <walter@sys-net.it> writes:
> 
> > > Looks like a corrupted overview file.  Does deleting
> > > ~/News/overview/nnimap/real.address.deleted help ?
> > 
> > Yes, thanks. 
> > But why? Some overview related bug?
> 
> I don't know, only that it seem to happen sometimes to some people.
> Did you keep the old overview file?  Would you mind sending the
> new&old one?
> 

OK the problem is here again.  
I have moved  novcache to novcache.OLD but the problem is still here :-(
The new novcache file is the same (no DIFFerence).

(setq nnimap-nov-is-evil t) 
No more novcache but the same problem :-((

The backtrace:
------------------------------------------------------------------------
Signaling: (wrong-type-argument number-or-marker-p lists\.opensales\.org)
  gnus-sorted-complement((1 2 18 20 21 111 128 140 188 189 280 283 370 379 392 403 405 417 419 437 438 439 441 lists\.opensales\.org [OSDevel]) (1 2 8 9 10 11 12 18 20 21 26 42 43 44 45 46 47 48 70 71 72 83 86 97 98 102 108 109 111 128 135 136 137 138 140 188 189 197 217 227 228 230 231 280 283 370 371 379 392 403 ... . (405 417 419 437 437 438 438 439 439 441 441)))
  gnus-select-newsgroup("nnimap+www.sys-net.it:INBOX.om_devel" nil nil)
  gnus-summary-read-group-1("nnimap+www.sys-net.it:INBOX.om_devel" nil t nil nil nil)
  gnus-summary-read-group("nnimap+www.sys-net.it:INBOX.om_devel" nil t nil nil nil nil)
  gnus-group-read-group(nil t)
  gnus-group-select-group(nil)
  gnus-topic-select-group(nil)
* call-interactively(gnus-topic-select-group)
------------------------------------------------------------------------

Hope this help.

Ciao

-- 
Walter Franzini, e-mail: walter@sys-net.it
SysNet, Via Digione 8, 27100 Pavia - Italy