ERROR: (execution) Numeric argument should be character. operation : = at line 10312 column 1 operands : _TEM1001, *LIT1433 _TEM1001 1 row 1 col (character, size 3) 1 *LIT1433 1 row 1 col (numeric) . statement : IF at line 10312 column 1 ERROR: Row or column names must be character statement : PRINT at line 10312 column 1 NOTE: Exiting IML. here's the code:   proc iml; %include "C:\Users\patrali.chakrabarty\Downloads\processv3\PROCESS\PROCESS v3.0 for SAS\process.sas"; run; %process (data = study1_comp,y = PI,x = TT,m = IM,w = PCE, z = R,cov = Often,plot = 1,moments = 1,model = 9,boot = 10000);run;   Any help will be appreciated. Thanks ... View more