Re: typesetting with Texshop

Henry:

> Help ! OPERATION NOT PERMITTED ?

I screen captured and then edited text from the png to get the
attached tex file.  This ran fine for me using latex from the command
line on macOS with:

% latex --version
pdfTeX 3.141592653-2.6-1.40.25 (TeX Live 2023)

If you had a subtle typo in your file I might have corrected it.  So
generally it is best to provide the actual file in addition to a
screen shot.  Then people won't have to rebuild your example.

Also, the most minimal example is best.  Remove all comments except
those relevant to the problem.  You may discover that this solves the
problem!

I suspect the problem is in DeclareGraphicsRule in your particular
operating system.  I was able to remove it and it seemed to have
no effect.  According to

https://tex.stackexchange.com/questions/585490/what-does-declaregraphicsrule-do

there are system calls (probably the ` type quotes).  The problem is
probably with getcwd = get current working directory.  So the call
DeclareGraphicsRule probably called getcwd which failed because it
could not find your current working directory.  Maybe there is none? 
I don't use graphical user interfaces (because in general they get
abandoned over time but command line programs can last much longer).

Deleting DeclareGraphicsRule made no difference.  Maybe you don't need
it?  I guess you removed any call to include a tiff when you prepared
the example ... I would convert a tiff to a postscript for inclusion
to avoid the issue.

Tom

  Thomas D. Schneider, Ph.D.
  Senior Investigator
  National Institutes of Health
  National Cancer Institute
  Center for Cancer Research
  RNA Biology Laboratory
  Biological Information Theory Group
  Frederick, Maryland  21702-1201
  [email protected]
  https://ccr.cancer.gov/staff-directory/thomas-d-schneider
  alum.mit.edu/www/toms
  https://alum.mit.edu/www/toms