Subject: Ambiguous redirection (This message is being sent to CPSC 215 Students and TA's) > When I run > ./a.out 4 3 proj.mapp 2> proj.err > I got a error saying ambiguous redirection. As discussed in lab 1 and in class last week there are two common families of command shell in Unix. The sh/bash family supports this form of redirection but the csh/tcsh family does not. You can start up the bash shell by simply entering bash So if you get the ambiguous redirection message, the solution is: bash ./a.out 4 3 proj.mapp 2> proj.err