For now, the majority of ap_pipe use cases with obs_decam use community pipeline (CP) bias and flat calibration products. It is well known that these require a separate set of processCcd configs, and when running processCcd from the command line, users typically provide the obs_decam/config/processCcdCpIsr.py file.
However, the obs_decam/config/apPipe.py file (which ap_pipe automatically uses! no command-line config specification required!) presently points to obs_decam/config/processCcd.py. This causes the infamous "No locations for get: bias" error because there are no biases, there are instead cpBiases.
This ticket is to switch the default in obs_decam/config/apPipe.py to point to obs_decam/config/processCcdCpIsr.py and add a comment so future ap_pipe users are hopefully less confused than I was.