Underfull \vbox (badness 10000) in tables

Underfull \vbox (badness 10000) in tables

[Aditya Mahajan]

Hi,

I get underfull \vbox badness 10000 in start/stoptable. Is this a 
false alarm, or am I doing something wrong?

\starttext
       \starttable[|ls(1em)|l|p(5cm)|c|]
         \HL[3]
         \BL[4]  \SR
         \NC \ReFormat[cB] {Forward Channel}
         \NC \ReFormat[cB] {Backward Channel}
         \NC \ReFormat[cB] {Equivalent System }
         \NC \ReFormat[cB] {Literature }
         \NC \SR
         \HL[2]
         \NC Noiseless \NC Noiseless/Useless
         \NC Real-Time source coding
         \NC [7]
         \NC \FR
         \NL
         \NC Noisy     \NC Noiseless
         \NC Real-Time joint source-channel coding over DMC with noiseless
             feedback
         \NC [5]
         \NC \MR
         \NL
         \NC Noisy     \NC Useless
         \NC Real-Time joint source-channel coding over DMC with no feedback
         \NC [2-3,5]        \NC \LR
         \HL[3]
       \stoptable
\stoptext

This gives

Underfull \vbox (badness 10000) detected at line 19

\vbox(43.40007+0.0)x142.26378
.\vbox(8.26648+0.0)x142.26378
..\hbox(8.26648+2.33331)x142.26378, glue set 0.88643
...\hbox(0.0+0.0)x0.0
...\*12ptrmtfrm* R
...\*12ptrmtfrm* e
...\*12ptrmtfrm* a
...\*12ptrmtfrm* l
...etc.
..\penalty 2100
..\glue(\baselineskip) 3.8669
..\hbox(8.26648+2.33331)x142.26378, glue set 0.35889
...\*12ptrmtfrm* c
...\kern-0.3264
...\*12ptrmtfrm* h
...\*12ptrmtfrm* a
...\*12ptrmtfrm* n
...etc.
..\penalty 2000
..etc.


Underfull \vbox (badness 10000) detected at line 24

\vbox(43.40007+0.0)x142.26378
.\vbox(8.26648+0.0)x142.26378
..\hbox(8.26648+2.33331)x142.26378, glue set 0.88643
...\hbox(0.0+0.0)x0.0
...\*12ptrmtfrm* R
...\*12ptrmtfrm* e
...\*12ptrmtfrm* a
...\*12ptrmtfrm* l
...etc.
..\penalty 2100
..\glue(\baselineskip) 3.8669
..\hbox(8.26648+2.33331)x142.26378, glue set 0.35889
...\*12ptrmtfrm* c
...\kern-0.3264
...\*12ptrmtfrm* h
...\*12ptrmtfrm* a
...\*12ptrmtfrm* n
...etc.
..\penalty 2000
..etc.


Lines 19 and 24 are end of rows. What is happening here?

Aditya