Programming Challenge: Palindromic Numbers on HP 50g

[Thomas Okken]

(01-14-2018 06:30 AM)Gerald H Wrote:  A faster version, obviating REV

NNTOK

[snip]

I tried running this in m48+ emulating the 49G+, and it doesn't recognize SREV.
The calculator has all the default settings; all I did before entering the program was switch from ALG to RPN mode.

I should obviously read the manual, and I will, but is there a quick fix for this problem?