SAS .gz文件无法运行.PIPE错误

Question

我正在尝试运行以下代码

filename hw&MONDATETO pipe   "zcat&WTDATADIR.MidMonthly_&DATEFROM._&DATETO..txt.gz";  

但不断收到错误消息：

UNOTE: The infile HW200611 is:                                                                      
  Unnamed Pipe Access Device,                                                                  
  PROCESS=zcat   O:\WTData\Monthly\v4\data\MidMonthly_20061014_20061113.txt.gz,                  
  RECFM=V,LRECL=256                                                                            

Stderr output:                                                                                     
'zcat' is not recognized as an internal or external command,                                       
operable program or batch file.                                                                    
NOTE: 0 records were read from the infile HW200611.                                                
NOTE: The data set WORK.HW200611 has 0 observations and 9 variables.                               
NOTE: DATA statement used (Total process time):                                                    
  real time           0.10 seconds                                                             
  cpu time            0.03 seconds    

我在Windows 2003服务器上以批处理模式运行SAS。任何帮助将不胜感激。