dbdoctor error, problem with environment variables?

 I'm evaluating a reference design for the Atmel SAM3X (link) but when attempting to open the BRD file with OrCAD PCB Designer Professional 17.4-2019 S026, I get:

So,

C:\Temp>%dbdoctor% .\SAM3X-EK_REVB.brd

Can't open environment file: C:/share/text/env

pcell_lib_path: Variable not defined

Parse error in file C:/CADENCE/SPB_DATA/pcbenv/env, line 10

Unable to find the messaging system module definitions file 'allegro_smi_modules.txt'

ERROR: Could not initialize the Allegro error messaging system.

That path to the environment file is odd because,

1. it's as if C:\ has been assigned root 
2. there is no \text\ directory in C:\Cadence\SPB_17.4\share\ 
3. the env file I edit resides at C:\Cadence\SPB_17.4\share\pcb\text\env

Then the following lines are odd because the pcell_lib_path variable is, in fact, defined in C:/CADENCE/SPB_DATA/pcbenv/env, line 10

My user variable for HOME is set to C:\CADENCE\SPB_DATA\ and I have read that CDS_ROOT is not necessary for a single version 17 install, am I missing some other magic environment variable?