Pardon me from the previous answer, you did help me a lot

After searching for the current vte development at gitlab, found the solution

get_text_range , is depreciated

Using: get_text_range_format, works perfectly

my ($string, $l) = $$self{_GUI}{_VTE}->get_text_range_format('VTE_FORM
+AT_TEXT', 0, 0, 0, 20);
[download]

Thanks a lot