sed 1 5 ainclude_directories command a expects followed by text

This error message is indicating that there is an issue with the syntax of the sed command. Specifically, the "a" command (which appends text after a specified line) is expecting a backslash followed by text, but it is not finding it.

Without seeing the specific sed command you are trying to run, it is difficult to provide a more specific solution. However, some possibilities for why this error might be occurring include:

• You may have accidentally omitted the backslash that the "a" command is expecting. Double-check the syntax of your command to ensure that it includes the correct backslashes.
• There may be a typo or other error in the line of code that precedes the "a" command. Double-check the syntax of the entire command to ensure that there are no errors or typos.
• There may be a problem with the file or input that you are trying to modify using sed. Check that the file exists and that you have the necessary permissions to modify it.

Overall, this error message is indicating that there is an issue with the syntax of your sed command. Double-check the command syntax and ensure that you are using the correct options and backslashes as needed