Error(s) in re-building vignettes:
--- re-building ‘Catch_errors.Rmd’ using rmarkdown

Simulation complete. Total execution time: 0.55s

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'Catch_errors.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Catch_errors.Rmd’

--- re-building ‘Fixed_obj_fun.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'Fixed_obj_fun.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Fixed_obj_fun.Rmd’

--- re-building ‘Parallel-computing.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'Parallel-computing.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Parallel-computing.Rmd’

--- re-building ‘Saving-results.Rmd’ using rmarkdown

WARNING: Condition terminated because of consecutive errors; using NA placeholders. 
	 Last error message was: Danger Will Robinson!

Simulation complete. Total execution time: 1.47s

Warning: One or more design rows were fatally terminated. Please inspect/debug row(s): 3

Saving simulation results to file: my-simple-sim.rds
Row 3 in design was terminated because it had 50 consecutive errors. 

Last error message was: 

Manual Error : Danger Will Robinson!

Simulation complete. Total execution time: 1.84s


WARNING:
my-simple-sim existed in the working directory.
                               Using a unique file name instead.


Saving simulation results to file: my-simple-sim-1.rds

Simulation complete. Total execution time: 1.72s


Simulation complete. Total execution time: 0.02s

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'Saving-results.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘Saving-results.Rmd’

--- re-building ‘SimDesign-intro.Rmd’ using rmarkdown

Simulation complete. Total execution time: 4.99s

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'SimDesign-intro.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘SimDesign-intro.Rmd’

SUMMARY: processing the following files failed:
  ‘Catch_errors.Rmd’ ‘Fixed_obj_fun.Rmd’ ‘Parallel-computing.Rmd’
  ‘Saving-results.Rmd’ ‘SimDesign-intro.Rmd’

Error: Vignette re-building failed.
Execution halted