Out of pty's error

[twoofy (Greg Saylor)]

ttyrec reports an error when invoking it:

MacBook-Pro:catcher_fix gsaylor$ sudo port uninstall ttyrec
--->  Deactivating ttyrec @1.0.8_1
--->  Cleaning ttyrec
--->  Uninstalling ttyrec @1.0.8_1
--->  Cleaning ttyrec
MacBook-Pro:catcher_fix gsaylor$ sudo port install ttyrec
--->  Fetching archive for ttyrec
--->  Attempting to fetch ttyrec-1.0.8_1.darwin_18.x86_64.tbz2 from https://packages.macports.org/ttyrec
--->  Attempting to fetch ttyrec-1.0.8_1.darwin_18.x86_64.tbz2.rmd160 from https://packages.macports.org/ttyrec
--->  Installing ttyrec @1.0.8_1
--->  Activating ttyrec @1.0.8_1
--->  Cleaning ttyrec
--->  Scanning binaries for linking errors
--->  No broken files found.
--->  No broken ports found.
MacBook-Pro:catcher_fix gsaylor$ ttyrec
Out of pty's
Terminated: 15

the binary build from "brew install ttyrec" works fine