bash babel code gives error

[Colin Baxter]

Hello,

I have various .tex files and an org file in the same directory. In the
org file is the following simple bash babel-code

#+begin_src bash
  sha256sum *.tex  > CHECKSUM
#+end_src

This code block used to work but no longer. It now gives the error

Error reading results: (beginning-of-buffer)

Yet the babel block

#+begin_src bash
  sha256sum -c CHECKSUM
#+end_src

works satisfactorily, and the command "sha256sum *.tex  > CHECKSUM
<RET>" works in a shell.

I'm using emacs-27.1 with Org mode version 9.3.7
(release_9.3.7-719-gcdfc40). 

Colin Baxter.