Output format not right in xAct

I started using xAct to perform some computations. I copied the xAct folder in the /.Mathematica/Applications folder in my Ubuntu system. I loaded it and created the manifold and defined the metric. The output however is not coming right on using the ordinary derivative PD[].

PD[-a][PD[-b][T[c, d, -e]]]


Out: $$PD(-a)(PD(-b)(T(c,d,-e)))$$

Does anyone know how to resolve this? Also whenever I click the xAct option in the Addons page of Mathematica, the screen freezes. I am using Mathematica 10.

• IN: PD[-a]@ PD[-b]@T[c, d, -e] is the correct command. – SUMAN KUNDU Oct 31 '19 at 6:24
• @SUMANKUNDU isn't it the same command? – Kuba Oct 31 '19 at 7:01