I've been using get_iplayer for nearly a year and its has been very reliable.  
Approx 3, 4 weeks ago the --pid-recursive option on a couple of CBBC programs stoped working. In that using the series pid doesnt find any episode info or PIDS. If i use a CBBC program PID it will find and download it no problem.  

Is this a bug or something i need to work around? Anyone have the same problem?

Below are two tests. i've run on WIN10 and WIN7 computers, both running v3.12.0 - results on both computers are identical.  


CBBC
Available Episodes:    https://www.bbc.co.uk/iplayer/episodes/b06qbvnv
> get_iplayer --pid=b06qbvnv --pid-recursive --test

Results in:

get_iplayer 3.12.0, Copyright (C) 2008-2010 Phil Lewis
 This program comes with ABSOLUTELY NO WARRANTY; for details use --warranty.
 This is free software, and you are welcome to redistribute it under certain
 conditions; use --conditions for details.

INFO: Millie Inbetween - CBBC - BBC
INFO: Page 1 of 1
INFO: No episode PIDs found, checking alternate location...
INFO: BBC iPlayer - Millie Inbetween
INFO: Page 1 of 1
INFO: No episode PIDs found for parent PID: b06qbvnv

NONE CBBC
Available Episodes: https://www.bbc.co.uk/iplayer/episodes/b093ypxy

> get_iplayer --pid=b093ypxy --pid-recursive --test

Results in:  

get_iplayer 3.12.0, Copyright (C) 2008-2010 Phil Lewis
 This program comes with ABSOLUTELY NO WARRANTY; for details use --warranty.
 This is free software, and you are welcome to redistribute it under certain
 conditions; use --conditions for details.

INFO: BBC One - Strike - Available now
INFO: Page 1 of 1
INFO:     Career of Evil, Episode 1 (b09trvpn)
INFO:     The Silkworm, Episode 2 (b09608pv)
INFO:     The Silkworm, Episode 1 (b0959ppk)
INFO:     The Cuckoo's Calling, Episode 3 (b094kxgj)
INFO:     The Cuckoo's Calling, Episode 2 (b093vg07)
INFO:     The Cuckoo's Calling, Episode 1 (b093vftv)
INFO:     The Story So Far (p05qr02n

It's not working due to changes at the BBC end. CBeebies programmes are affected as well. It will be fixed in the next release. Until then you will need to download episodes individually.

EDIT: Since you appear to be using get_iplayer outside the UK, this thread is closed - see forum rules.

fixed in v3.13