Several minutes after my submission, I got two links of certificates and letters. But their contents are just both an error report, just as below: <b>Fatal error</b>: Allowed memory size of 268435456 bytes exhausted (tried to allocate 695222272 bytes) in <b>/var/www/html/portal/sites/all/modules/custom/extensions/netacadcertificatesletters/netacadcertificatesletters.allcertletter_download.inc</b> on line <b>208</b><br /> Could you please help me to resolve this Get All Letters & Certificates problem? Thank you very much!