[slrn+slrnpull] Warning: Could not save list of requested bodies

I am still just setting up slrnpull so I am probably missing something
obvious:

After i have downloaded headers using slrnpull for various groups, I
then use:

slrn --spool

to look at the headers. I then use 'm' to mark those articles for which
I wish to see the bodies.

When I then quit the group the follwing message appears at the bottom of
the screen:

"Warning: Could not save list of requested bodies"

SLRN DETAILS:

Slrn 0.9.8.1-jwk1 [2004-10-07]
S-Lang Library Version: 1.4.9
Compiled at: Aug 12 2007 20:37:20
Operating System: Linux

COMPILE TIME OPTIONS:
Backends: +nntp +slrnpull +spool
External programs / libs: -canlock -inews -ssl -uudeview
Features: +jwk_hack +multi_threading_pull +keep_score_on_expire
-group_subdir +charset_mapping +charset_mapping +decoding
+emphasized_text +end_of_thread +fake_refs +gen_msgid -grouplens
+mime -msgid_cache +piping +rnlock +slang +spoilers -strict_from
DEFAULTS:
Default server object: nntp
Default posting mechanism: nntp
Default character set: isolatin
SUPPORTED CHARACTER SETS:
isolatin ibm850 ibm852 ibm857 ibm737 NeXT koi8

SLRNPULL:

slrnpull version: 0.9.8.1-jwk1
.