RNF error on %lookup

 
d additionaldata_Template...                                         
d                 ds                  qualified  based(dummy_ptr)    
d data                                likeds(data_Template) dim(9)   
d                                                                    
d data_Template   ds                  qualified  based(dummy_ptr)    
d name                          32a                                  
d value                         32a                                  
 *;                                                                  
 
 
 
               
 My code is as below , my declaration of DS is as above. The second parameter in lookup I coded an array.
Could you please let me know why I am getting this error and how to fix it. Thanks!
 
w_idx1 = %lookup(*blanks:data_Template);     
w_idxITM = w_idx1-1;   
 
 
The second parameter for %LOOKUPxx is not valid.
 
20
 
Cause . . . . . : The second parameter for built-in function %LOOKUP, %LOOKUPGE, %LOOKUPGT, %LOOKUPLE, or %LOOKUPLT must be the name of an array. In addition, it must be the same type and have the same CCSID as the first parameter. The built-in function is ignored.
 
Recovery . . . : Correct the second parameter for the built-in function. Compile again