Hello, It seems the R55 new alias definition policy prevents some commands from being find in the PATH:
$ echo $PATH /usr/local/bin:/usr/bin:/bin $ ls /usr/bin/python* /usr/bin/python /usr/bin/python2-config /usr/bin/python-config /usr/bin/python2.7 /usr/bin/python2 /usr/bin/python2.7-config $ hash python; echo $? 0 $ hash python2; echo $? 0 $ hash python2.7; echo $? mksh: alias: python2.7: invalid alias name 1 Even if it seems the dot is in the POSIX Portable Character Set and should hence be allowed, I think an illegaly defined alias should however not stop further searching. Take care! Seb.