• using R version 3.6.2 (2019-12-12)
• using platform: x86_64-apple-darwin15.6.0 (64-bit)
• using session charset: UTF-8
• checking for file ‘stpp/DESCRIPTION’ ... OK
• this is package ‘stpp’ version ‘2.0-4’
• checking package namespace information ... OK
• checking package dependencies ... ERROR
  Package required but not available: ‘rpanel’
  
  See section ‘The DESCRIPTION file’ in the ‘Writing R Extensions’
  manual.
• DONE
  Status: 1 ERROR