Hello ! Everyone, I am back here again to get your help.
But I will try to help others in another way, so please generous.
O.K. let me get started. I got weird error message as shown at the title, while I am reviewing the error_log at /var/log/httpd/ error_log. I never encountered this error message, so I can't figure the point of the error message. Does anyone has any clue to fix this error?

I will post the references.
==== httpd error_log about 10 lines =============…

Hi ! Everyone there ! How are you ?

After the movement a pair of Perl scripts (script_main.pl and script_sub.pl), in which I integrated the minor script_sub.pl into the main part (script_main.pl) by using "require".

In the main script_main.pl, I just inserted the following line,

require 'script_sub.pl';

By this way, two scripts worked as if one. While Perl version was 5.8…