!!!CASA of versions older than 4.7
{{category The entire system}}{{category Data analysis servers(kaim* & kaih*)}}

The OS of all computers in the Multi-wavelength Data Analysis 
System (MDAS) is Red Hat Enterprise Linux 7 (RHEL7).

The earlier versions of CASA than version 4.7 are not supported 
on RHEL7 and the behavior is not guaranteed.

Therefore, they cannot be installed on the MDAS.