Is there a maximum size for a Preference created via scripting?

Hello

I've developed a script that saves some information to Preferences file when closing AE. A user had this error:

"Unable to execute script at line 1. After Effects error: Preference [Settings_colorLibrary] 'saved_library' is 2732 bytes, max allowed is 1999 bytes."

Some testing has confirmed this error, as info written to Preferences gets bigger. My question is: Is there a limit to the information I can write to Preferences file? Error message said 2 KB, which is quite low. I had the same problem using bith Mac and Win.

Thanks.