These functions are no longer available in secr.
# Defunct in 4.5.9ip.secr()
pfn()
# Defunct in 4.4.2 (2021-05-04)
make.newdata()
# Defunct in 4.4.0 (2021-05-01)
secr.make.newdata()
# Defunct in 4.0.0 (2019-10-27)
read.SPACECAP()
write.SPACECAP()
ip.secr and pfn have been superceded by ipsecr.fit and
proxy.ms in package ipsecr.
Internal functions secr.make.newdata and make.newdata were
replaced with makeNewData generic from 4.4.2.
SPACECAP was removed from the CRAN archive on 2019-08-31.
secr-deprecated