need help with FCAT program for HP 42S

[ELye]

In the HP-42S RPN Scientific Programming Examples and Techniques manual, Edition 1 July 1988, page 54, program FCAT line :

50 LBL 14

what is the purpose of this line?

I spent 4 hours keying in this program - GTO A is hardly intuitive. My first and previous calculator was the 32S and the 42S (actually Free42) is several levels more complex. So I am relearning with a view to writing a superior circle-triangle-circle program with all the bells and whistles.

FCAT seemed a good program to learn from but this step has me stumped.

Was there an erratum about this?

Thanks.