I had TVH working on DSM and recognizing tv_grab_file for a long time, including .2409 build. Had problems with updating to 2436/2437, eventually causing reinstall. Now with 2437 I cannot get it to recognize tv_grab_file. The script is in .../homes/tvheadend-testing directory, with mode 777, and with a symbolic link in /usr/bin. This used to work fine. I now have added a tv_find_grabbers script with same attributes and link, but it has not resolved the problem.
Any ideas what has changed or what I have forgotten?
[edit] I should also mention that I have restarted TVH and DSM numerous times in the course of trying to solve this.