Found the following significant warnings:
  crit.h:1272:19: warning: enumeration value 'NoCrit' not handled in switch [-Wswitch]
  crit.h:1358:19: warning: enumeration value 'NoCrit' not handled in switch [-Wswitch]
  mult.h:777:19: warning: enumeration value 'Divide' not handled in switch [-Wswitch]
  predict.h:491:33: warning: enumeration value 'Weighted' not handled in switch [-Wswitch]
  predict.h:445:13: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  predict.h:717:41: warning: enumeration value 'Random' not handled in switch [-Wswitch]
  predict.h:581:13: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  predict.h:909:17: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  dist.h:312:5: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  dist.h:524:13: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  isoforest.h:620:13: warning: enumeration value 'Fail' not handled in switch [-Wswitch]
  isoforest.h:684:13: warning: enumeration value 'Fail' not handled in switch [-Wswitch]
  extended.h:293:13: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  impute.h:557:5: warning: enumeration value 'Prop' not handled in switch [-Wswitch]
  impute.h:583:5: warning: enumeration value 'Same' not handled in switch [-Wswitch]
  crit.h:1554:13: warning: enumeration value 'NoCrit' not handled in switch [-Wswitch]
  crit.h:1641:13: warning: enumeration value 'NoCrit' not handled in switch [-Wswitch]
  extended.h:462:5: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  extended.h:734:13: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  mult.h:959:13: warning: enumeration value 'Divide' not handled in switch [-Wswitch]
  sql.cpp:310:11: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
  sql.cpp:483:15: warning: enumeration value 'NotUsed' not handled in switch [-Wswitch]
See 'd:/Rcompile/CRANpkg/local/4.2/isotree.Rcheck/00install.out' for details.