Dear Sven , 

                 Thanks for your suggestion. As per your instruction I add the brackets where ever necessary and corrected in my script .

In  gretl version 2023_b , the printf command ( with out brackets) runs and gives the results.

printf"------------------------------------------------------------\n"

This command does not show any error and got the results.

What the problem faced is ,  In gretl version 2025b, for the same script I got the error and halting.

gretl version 2025b

Current session: 2025-06-21 00:35

? clear

Parse error at unexpected token 'printf"'

Error executing script: halting

> printf"------------------------------------------------------------\n"

This command shows an error and halting.

 By adding the brackets , the script  for 2025b runs  without any error and give the results

printf("------------------------------------------------------------\n")

 string F_Bound_LS= sprintf("F_Bound_Calculated :  %.4f\n F_Lower_Bound_I[0]:  %.4f\n\

F_Upper_Bound_I[1]:  %.4f\n",F_Calc_Bound_LS,F_B_I0,F_B_I1)

print "@F_Bound_LS"

string t_Bound_LS= sprintf("t_Bound_Calculated : %.4f\n t_Lower_Bound_I[0]:  %.4f\n\

t_Upper_Bound_I[1]:  %.4f\n",t_Calc_Bound_LS,t_B_I0,t_B_I1)

print "@t_Bound_LS"

Thanks with regards.

Dhanasekaran.