タイプセットした所エラーが出てdviファイルは出力されませんでした。logファイルは以下のとおりです。

%-----ex.log
This is pTeX, Version 3.141592-p3.1.3 (sjis) (Web2C 7.5.2) (format=platex 2004.3.25)  29 MAY 2005 17:27
**ex
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LaTeX Info: Redefining \mathrm on input line 599.
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LaTeX Info: Redefining \ldots on input line 379.
LaTeX Info: Redefining \dots on input line 382.
LaTeX Info: Redefining \cdots on input line 467.
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LaTeX Info: Redefining \[ on input line 2666.
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No file ex.aux.
\openout1 = `ex.aux'.

LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for JY1/mc/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for JT1/mc/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.

! Package keyval Error: item undefined.

See the keyval package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.4  \begin{rectbox}[item={~ああ~}]
                                   
Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

LaTeX Font Info:    Try loading font information for U+msa on input line 6.
(c:/USR/LOCAL/share/texmf/tex/latex/amsfonts/umsa.fd
File: umsa.fd 2002/01/19 v2.2g AMS font definitions
)
LaTeX Font Info:    Try loading font information for U+msb on input line 6.

(c:/USR/LOCAL/share/texmf/tex/latex/amsfonts/umsb.fd
File: umsb.fd 2002/01/19 v2.2g AMS font definitions
) [1

] (./ex.aux) ) 
Here is how much of TeX's memory you used:
 4487 strings out of 95561
 45381 string characters out of 1191502
 133815 words of memory out of 1500001
 7605 multiletter control sequences out of 10000+50000
 9218 words of font info for 39 fonts, out of 600000 for 2000
 14 hyphenation exceptions out of 2000
 47i,5n,32p,250b,234s stack positions out of 1500i,500n,5000p,200000b,5000s

Output written on ex.dvi (1 page, 544 bytes).

▼関連発言
│
└◆3085:rextbox環境について [PPO] 05/28 16:09
　└◆3086:Re:rextbox環境について [tDB] 05/28 16:34
　　└◆3088:Re[2]:rextbox環境について [PPO] 05/28 17:42
　　　├◆3089:--- [---] 05/28 18:04
　　　└◆3090:Re[3]:rextbox環境について [tDB] 05/28 18:07
　　　　└◆3093:Re[4]:rextbox環境について [PPO] 05/29 12:48
　　　　　└◆3094:Re[5]:rextbox環境について [tDB] 05/29 12:58
　　　　　　├◆3098:Re[6]:rextbox環境について [PPO] 05/29 17:27
　　　　　　└◆3099:Re[6]:rextbox環境について [PPO] 05/29 17:28
　　　　　　　└◆3100:Re[7]:rextbox環境について [tDB] 05/29 17:40
　　　　　　　　├◆3101:Re[8]:rextbox環境について [PPO] 05/29 18:27
　　　　　　　　└◆3102:Re[　8]:rextbox環境について [PPO] 05/29 18:29
　　　　　　　　　└◆3103:Wrapfig & rectbox [tDB] 05/29 19:43<-last