I'm getting the error message "Unable to find changes in a file. This could be due to various reasons. Please retry the operation. Retry the operation. (0x07EF8)"
Event log is pretty sparse. The job starts, two entries stating storage quota is within limits, then the failure, with XML details of:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"><System><Provider Name="CloudBackup" Guid="{abb3d988-13d1-4d34-808e-e53a2a84d97f}" /><EventID>11</EventID><Version>1</Version><Level>2</Level><Task>0</Task><Opcode>1</Opcode><Keywords>0x4000000000000000</Keywords><TimeCreated SystemTime="2016-03-28T17:15:38.024Z" /><EventRecordID>22</EventRecordID><Correlation /><Execution ProcessID="8588" ThreadID="15204" /><Channel>CloudBackup</Channel><Computer>AOCA-SERVER.arcofthecapitalarea.org</Computer><Security UserID="S-1-5-18" /></System><EventData><Data Name="StopInfo"><?xml version="1.0"?> <CBJob><JobId>db561afa-04ef-4e28-b284-95abf05b65c5</JobId><JobType>Backup</JobType><JobStatus><JobState>Aborted</JobState><StartFileTime>131036578798593992</StartFileTime><EndFileTime>131036589380231856</EndFileTime><FailedFileLog></FailedFileLog><ErrorInfo><ErrorCode>32504</ErrorCode><DetailedErrorCode>-2147023504</DetailedErrorCode><ErrorParamList><CBErrorParam><Name>DLS_ERROR_CODE_NAME</Name><Value>32504</Value></CBErrorParam></ErrorParamList></ErrorInfo><DatasourceStatus><CBDatasourceStatus><JobState>Aborted</JobState><LastCompletedJobState>EstimatingSize</LastCompletedJobState><ErrorInfo><ErrorCode>32504</ErrorCode><DetailedErrorCode>-2147023504</DetailedErrorCode><ErrorParamList><CBErrorParam><Name>DLS_ERROR_CODE_NAME</Name><Value>32504</Value></CBErrorParam></ErrorParamList></ErrorInfo><Datasource><DataSourceId>359854649</DataSourceId><DataSourceName>C:\</DataSourceName></Datasource><ByteProgress><Total>172850921472</Total><Changed>0</Changed><Progress>0</Progress><Failed>0</Failed></ByteProgress><FileProgress><CurrentFile></CurrentFile><Total>249262</Total><Changed>0</Changed><Progress>0</Progress><Failed>0</Failed></FileProgress></CBDatasourceStatus></DatasourceStatus></JobStatus></CBJob></Data></EventData></Event>That error code is nowhere to be found, nor is the one listed in the even log detail, 32504.
This is an incremental backup for a full job that ran successfully last week.