Are you running in a Windows cmd environment? If so, it looks like you may need to escape the ‘>’ symbol, which is a special character for redirection of cmd output. Try ^> i.e. k={6*($^>+1)}
Are you running in a Windows cmd environment? If so, it looks like you may need to escape the ‘>’ symbol, which is a special character for redirection of cmd output. Try ^> i.e. k={6*($^>+1)}