Is there a limit in the size of report's sent from EventLog Analyzer

Is there a limit in the size of report's sent from EventLog Analyzer

We have a report that runs to gather the PCI events for our systems but when the email comes in we get the following

This mail is the result of Eventlog Analyzer Reports Generation Engine.
Problem while sending the report.[Full PCI Daily Summary_Jan_04_2018_08_00_28.pdf] Problem could be of large File size

Any advice would be grateful.

Thanks
John.