Good morning, I am trying to run and install RegCM5.0.0, when I try to configure the model I get this error message :

"./configure.ac: line 20: syntax error near unexpected token `[RegCM],'

./configure.ac: line 20: `AC_INIT([RegCM], [5.0.0], [ggiulian@ictp.it])' "

Can someone please help me on how to solve this problem?

Kind regards