WARNING: The variable CT in the DROP, KEEP, or RENAME list has never been referenced.

[Desi2003]

DATA Phy_Act1;
	SET	CoImpt.PhysicalActivity;
	RENAME	CT	= TRACT_NAME;
	RUN;

Above is code from a project. When I run this code, here is my log:

 80         %LET CourseRoot = /home/u63571562/BIOS6680_2023;
 81         LIBNAME CoImpt "&CourseRoot/CDPHE Study/Data/2_Import";
 NOTE: Libref COIMPT refers to the same physical library as _TEMP3.
 NOTE: Libref COIMPT was successfully assigned as follows: 
       Engine:        V9 
       Physical Name: /home/u63571562/BIOS6680_2023/CDPHE Study/Data/2_Import
 82         LIBNAME CoAnl "&CourseRoot/CDPHE Study/Data/4_Analysis";
 NOTE: Libref COANL was successfully assigned as follows: 
       Engine:        V9 
       Physical Name: /home/u63571562/BIOS6680_2023/CDPHE Study/Data/4_Analysis
 83         
 84         *Rename CT in physical activity to tract_name*;
 85         DATA Phy_Act1;
 86         SETCoImpt.PhysicalActivity;
 87         RENAMECT= TRACT_NAME;
 88         RUN;
 
 WARNING: The variable CT in the DROP, KEEP, or RENAME list has never been referenced.
 NOTE: There were 1249 observations read from the data set COIMPT.PHYSICALACTIVITY.
 NOTE: The data set WORK.PHY_ACT1 has 1249 observations and 6 variables.
 NOTE: DATA statement used (Total process time):
       real time           0.00 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds
       memory              1198.81k
       OS Memory           26200.00k
       Timestamp           11/08/2023 06:14:15 PM
       Step Count                        413  Switch Count  2
       Page Faults                       0
       Page Reclaims                     154
       Page Swaps                        0
       Voluntary Context Switches        12
       Involuntary Context Switches      0
       Block Input Operations            0
       Block Output Operations           520
       
 
 89         
 90         OPTIONS NONOTES NOSTIMER NOSOURCE NOSYNTAXCHECK;
 100        

Why I am I getting this error when it seems to be working fine, and how do I get rid of it?

[Kurt_Bremser · Accepted solution]

There is no variable named CT in the incoming dataset. Remove the RENAME statement to avoid the WARNING.