Memory Error in

WordPress now has an alarming feature that emails you whenever there is an error in a plugin file:

An error of type E_ERROR was caused in line 243 of the file /mypath/wp-content/plugins/s2member-pro/src/includes/classes/](http://mypath/wp-content/plugins/s2member-pro/src/includes/classes/ Error message: Allowed memory size of 268435456 bytes exhausted (tried to allocate 2669467 bytes)

Currently have approximately 15,300 users, which memory setting does need bumped?