System Decoding PCREs and Alternate PCREs

v    Recommended for advanced users only v    Edit the Windows Registry at your own risk
Gravity's multi-part recognition PCRE may be confused by certain subjects that contain two numbers separated by a forward slash. Advanced users can edit the PCRE used internally for multi-part recognition.
Note: If Gravity is not recognizing any multi-part binaries automatically, check the fix at the end of this page
Registry Key Location:
Versions 2.9 and higher (major versions will have their own key):
HKEY_CURRENT_USER\Software\MicroPlanet\Gravity 2.9\System
Versions before 2.9:
HKEY_CURRENT_USER\Software\MicroPlanet\Gravity\System

Key Name:  DecodeRE-Parts
Default Value:
([0-9]+)/([0-9]+)

Alternate 1:
If Gravity gets confused by dates or subjects like "B&W Farm 5/31" - this PCRE requires the parentheses
\(([0-9]+)/([0-9]+)\)

Alternate 2:
If you need to capture parts in brackets or parentheses:
[\[|\(]([0-9]+)/([0-9]+)[\)|\]]
Credit and thanks to user AM

Gravity Does Not Recognize Multi-Part Binaries
If you had an old version of Gravity, the old regular expression, (before the switch to PCRE) may be in the registry. The installer does not overwrite most of the user's settings
If you see this, it is the OLD and INCORRECT expression:
   [0-9]+$b/[0-9]+$c
This one is correct:      ([0-9]+)/([0-9]+)