I am using following code but getting error
Error on line 136:
(SQR 3710) Unknown argument type.

Given below part of program where i am getting error.......

input $p_region type=char

if ( '$p_region' = 'ESAP' )
let $msg = 'YES'
do log_msg ({PROG_NAME}, {SEV_INFO}, $msg)
else
let $msg = 'NO'
do log_msg ({PROG_NAME}, {SEV_INFO}, $msg)
fi


could you please let me know what is the solution for this.