Your basic program may contain a first line that looks like the title of this section. This may seem strange for UNIX users, but this is usual under Windows. On Windows systems such a first line is used to transfer the execution of the Windows command interpreter to the end of the command file, where the interpreter is invoked for the same file.
This looks like:
scriptbasic program lines
rem """
:start
@echo off
scriba %0 %1 %2 %3 %4 %5 %6 %7 %8 %9
rem """
@goto start
assuming that scriba is in the path this file named something xxxx.cmd can be started from the command line and will execute the BASIC program. The first line is ignored by the ScriptBasic interpreter, but the Windows command processor will jump to the line containing :start. On this line the ScriptBasic interpreter is started and reads and interprets the lines. The first line is ignored by ScriptBasic, the last few lines are comment at least for ScriptBasic.
To ease portability such a first line is ignored when executing a BASIC program under UNIX.